ISO/TC 17/SC 12 - Continuous mill flat rolled products

This document specifies the requirements for steel sheet, in coils and cut length, metallic-coated by the continuous hot-dip zinc-coated twin-roll cast process of commercial quality. The steel sheet is intended for applications requiring corrosion resistance, formability and paintability. The steel sheet is produced in a number of grades, coating masses, surface treatments and ordering conditions.

This document specifies the requirements for steel sheet, in coils and cut length, metallic-coated by the continuous hot-dip zinc-coated twin-roll cast process, of structural and high strength quality. The product is intended for applications requiring corrosion resistance, and paintability. The steel sheet is produced in a number of grades, coating masses, surface treatments and ordering conditions.

This document specifies the requirements for hot-rolled twin-roll cast steel sheet of structural quality and high strength steel. The product is intended for applications where specific mechanical properties are required. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures, and it is produced on a wide strip mill, not a plate mill. Structural quality twin-roll cast steel sheet is a carbon steel produced to specified mechanical properties and is available in a number of grades. High strength hot-rolled twin-roll cast steel sheet, strengthened by microalloys is produced to specified mechanical properties and is available in a number of grades and classes.

This document specifies the requirements for hot-rolled twin-roll cast steel sheet of commercial quality. The product is intended for applications where the presence of oxide or scale or normal surface imperfections disclosed after removal of oxide or scale are not objectionable. It is not suitable for applications where the surface is of prime importance. This document does not cover steel sheet that is subjected to subsequent rolling.

This document specifies the minimum requirements for steel strip of carbon over 0,25 %, in coils and cut lengths. The product is applicable to highly stressed parts of many different types and is characterized by close dimensional tolerances and controlled surface finishes. The steel strip is produced in a number of types and surface finishes to be compatible with differing applications requirements. This document does not apply to alloy steels or stainless steels.

This document is applicable to the minimum requirements for steel sheet, in coils and cut lengths, metallic-coated by the continuous hot-dip process, with aluminium-silicon alloy coating. The product is intended for heat-resisting applications and also where both corrosion and heat resistance are required. The steel sheet is produced in a number of quality designations and grades, coating mass, surface treatments and coating finish conditions to be compatible with differing application requirements.

This document specifies requirements for steel sheet hot-rolled of structural quality with improved atmospheric corrosion resistance, also known as weather-resistant structural steel. It is produced in the grades and classes listed in Table 1. The product is intended for applications where requirements are for mechanical properties and increased resistance to atmospheric corrosion. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures. This document does not apply to the following steel qualities: — steels intended for boilers and pressure vessels, and steels designated as commercial quality and drawing qualities (see ISO 3573); — steels produced on reversing mills and designated with improved atmospheric corrosion resistance (see ISO 630-5); — steels designated with structural quality (see ISO 4995), and high yield strength structural quality (see ISO 4996); — steels designated with higher yield strength with improved formability (see ISO 5951).

This document is applicable to the minimum requirements for steel sheet used in the manufacture of corrugated steel pipe, in coils, flat cut lengths and corrugated cut lengths metallic-coated by the continuous hot-dip process. This product is intended for storm sewers, culverts, drains and similar uses. Several metallic-coated materials are covered, which relies on users to determine which product best serves their needs. Four different metallic coatings are included: — zinc coated; — zinc-5 % aluminium-mischmetal alloy coated; — 55 % aluminium-zinc alloy coated; — aluminium-silicon alloy coated.

ISO 14788:2017 is applicable to the minimum requirements for steel sheet, in coils and cut lengths, metallic-coated by the continuous hot-dip process, with zinc-5 % aluminium alloy coating. The product is intended for applications requiring corrosion resistance, formability and paintability. The steel sheet is produced in a number of quality designations and grades, coating type, coating mass, surface treatments and coating finish conditions designed to be compatible with differing application requirements.

ISO 20805:2017 is applicable to continuous hot-rolled steel sheet in coils of higher yield strength with improved formability and heavy thickness for cold forming. The steel can be treated to achieve inclusion control. It is generally used in the as-delivered condition. As a result of the combination of higher strength and improved formability, it is possible to obtain savings in mass along with better weldability. The product is intended for applications where parts are to be fabricated requiring better formability than is provided by normal high-yield-strength steel sheet. The steel sheet is produced in a number of grade designations designed to be compatible with differing application requirements. ISO 20805:2017 does not apply to - steels intended for boilers or pressure vessels, - steels designated as commercial quality, drawing quality or structural quality, - steels rolled to cold-reduced products, - steels designated as weathering steels, having increased atmospheric corrosion resistance, or - those products rolled on a plate mill.

ISO 9364:2017 is applicable to the requirements for steel sheet, in coils and cut lengths, metallic-coated by the continuous hot-dip process with 55 % aluminium-zinc alloy coating. The product is intended for applications requiring the corrosion characteristics of aluminium coupled with those of zinc, or heat resistance, or both. The steel sheet is produced in a number of quality designations and grades, coating mass, surface treatments and coating finish conditions designed to be compatible with differing application requirements.

ISO 13887:2017 is applicable to all grades of cold-reduced steel sheet of higher yield strength with improved formability. The steel is made according to fine-grain practice and has a suitable chemical composition to provide improved formability. The product is intended for the fabrication of parts requiring better formability. It is generally used in the delivered condition. ISO 13887:2017 does not apply to steels designated as commercial quality or drawing quality (see ISO 3574), steels of structural quality (see ISO 4997) or steels of high tensile strength and low yield point with improved formability (see ISO 14590).

ISO 13976:2016 applies to hot-rolled carbon/manganese steel sheet in coils of structural quality without the use of microalloying elements. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures. The product is produced on a wide sheet mill. The product is intended for structural purposes where particular mechanical properties are required. The steel sheet is produced in a number of grade designations designed to be compatible with differing application requirements. It does not cover steels intended for boilers or pressure vessels, or steels designated as commercial quality or drawing qualities, or steels rolled to cold-reduced products, or steels designated as weathering steels, having increased atmospheric corrosion resistance, or those products rolled on a plate mill.

ISO 14590:2016 applies to cold-reduced steel sheet of two types that are commercially available in the world. Type 1 represents steels that are produced to mechanical properties only and Type 2 represents steels that are produced to both chemical and mechanical properties. Bake hardening steels are included in both types. It does not cover steels designated as commercial quality or drawing qualities (covered in ISO 3574), steels of structural quality (covered in ISO 4997) or steels of higher strength with improved formability (covered in ISO 13887).

ISO 3575:2016 is applicable to the requirements for steel sheet, in coils and cut lengths, metallic-coated by the continuous hot-dip process, with zinc and zinc-iron alloy coatings. The product is intended for applications requiring corrosion resistance, formability and paintability. The steel sheet is produced in a number of designations, coating masses, surface treatments and coating conditions designed to be compatible with differing application requirements. ISO 3575:2016 does not cover steels designated as structural quality, which are covered in ISO 4998.

ISO 4997:2015 applies to cold-reduced carbon steel sheet of structural quality in grades CR220, CR250, CR320, and CH550, usually without the use of microalloying elements. The product is intended for structures that include bolting, riveting, and welding. It is generally used in the delivered condition for fabricating purposes, such as bending, forming, and welding. ISO 4997:2015 does not cover steels designated as commercial quality or drawing qualities (covered in ISO 3574), cold-reduced carbon steel sheet according to hardness requirements (covered in ISO 5954), cold-reduced steel sheet of higher strength with improved formability (covered in ISO 13887), or cold-reduced steel sheet of high tensile strength and low yield point with improved formability (covered in ISO 14590).

ISO 4996:2014 applies to hot-rolled steel sheet of high yield stress structural quality with the use of microalloying elements. The product is intended for structural purposes where particular mechanical properties are required. It is generally used in the delivered condition and is intended for structures that may include bolting, riveting and welding. ISO 4996:2014 is not applicable to steels intended for boilers or pressure vessels, steels designated as commercial quality or drawing quality (covered by ISO 3573), steels to be re-rolled to cold-reducing products, steels designated as weathering steels, having increased atmospheric corrosion resistance, or steels having improved formability properties compared with those covered by it.

ISO 4995:2014 applies to hot-rolled steel sheet of structural quality in the grades listed in Table 1, usually prepared without the use of microalloying elements. The product is intended for structural purposes where particular mechanical properties are required. It is generally used in the delivered condition and is intended for bolted, riveted, or welded structures. This product is produced on a wide strip mill, not a plate mill. This International Standard does not cover steels intended for boilers or pressure vessels, steels designated as commercial quality or drawing quality (covered in ISO 3573[1]), steels to be re-rolled to cold-reduced products, or steels designated as weathering steels, having increased atmospheric corrosion resistance.

ISO 4998:2014 specifies continuous hot-dip zinc-coated and zinc-iron alloy-coated carbon steel sheet of structural quality. The product is intended for applications where resistance to corrosion is of prime importance. The steel sheet is produced in a number of grades, coating masses, ordering conditions, and surface treatments.

ISO 6932:2014 describes cold-reduced carbon steel strip with a maximum mass fraction of carbon of 0,25 %, furnished to two levels of closer tolerances than cold-reduced carbon steel sheet, with specific quality, specific hardness requirements or mechanical properties, specific edge, and specific finish.

ISO 5954:2014 applies to cold-reduced carbon steel sheet and corresponding hardness requirements. It is suitable for applications where the surface is of prime importance. The following are common hardness ranges (see 6.6): CRH-50: Rockwell B 50 to 70; CRH-60: Rockwell B 60 to 80; CRH-70: Rockwell B 70 to 90; CRH-NN: Any Rockwell B range of 20 points up to and including HRB 90 maximum (designated minimum of specified range will be shown).

ISO 5002:2013 specifies the characteristics of carbon steel sheet of commercial and drawing qualities in cut length or coil form, zinc coated by electrolytic deposition. Electrolytic zinc-coated sheet is intended for the manufacture of formed or of miscellaneous parts, and can be supplied chemically treated to render it more suitable for painting. The zinc coating is expressed in micrometres of thickness per side, for equally coated, differentially coated, or one-side-coated sheets. These sheets are generally produced with coatings, which are not intended to withstand outdoor exposure without chemical treatment and painting. Electrolytic zinc-coated sheet can be produced in thicknesses of 0,36 mm and thicker (normally up to 4,0 mm) and in widths of 600 mm and over in coils or cut lengths. It is recognized that materials thinner than 0,36 mm or thicker than 4,0 mm can be suitable for electrolytic zinc coating, and, if required, be the subject of agreement between the interested parties.

ISO 5951:2013 applies to all grades of hot-rolled steel sheet of higher yield strength with improved formability. The steel is killed, made according to a fine grain practice and has a suitable chemical composition, including microalloying elements, to provide improved formability. The product is intended for the fabrication of parts requiring better formability than is provided by normal high yield strength steel sheet. It is generally used in the delivered condition. Because of the combination of higher strength and improved formability, it is possible to obtain savings in mass along with better weldability. ISO 5951:2013 does not cover steel intended for boilers or pressure vessels, steels designated as commercial quality or drawing quality (covered in ISO 3573), steels designated as weathering steels, having increased atmospheric corrosion resistance, or lower yield strength steels having less formability compared with those in ISO 5951:2013 (covered in ISO 4995 and ISO 4996).

1SO 6316:2012 specifies requirements for hot-rolled steel strip of structural quality, usually without the use of microalloying elements. This product is intended for structural purposes where particular mechanical properties are required. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures. It is commonly rolled on a narrow strip mill. 1SO 6316:2012 does not cover steels designated as commercial quality or drawing quality (covered in ISO 6317) or steels intended for boilers or pressure vessels, or steels to be rerolled to cold-reduced products, or steels designated as weathering steels, having increased atmospheric corrosion resistance.

ISO 3074:2012 applies to cold-reduced carbon steel sheet of commercial and drawing qualities. It is suitable for applications where the surface is of prime importance.

ISO 10384:2012 applies to hot-rolled carbon steel sheet as defined by chemical composition. The product is generally used in the heat-treated condition after hot or cold working, press forming or cutting by the customer. For example, the product is used for general machinery such as sprocket wheels, chain links, washers, knife blades and agricultural implements.

ISO 3573:2012 applies to hot-rolled carbon steel sheet of commercial and drawing qualities. Hot-rolled steel sheet is suitable for many applications where the presence of oxide or scale, or normal surface imperfections disclosed after removal of oxide or scale, are not objectionable. It is not suitable for applications where the surface is of prime importance.

ISO 16160:2012 applies to dimensional and shape tolerances for all hot-rolled steel sheet products.

ISO 5950:2012 applies to cold-reduced carbon steel sheet of commercial and drawing qualities coated in coil or cut length forms by electro-deposition of tin. The product is commonly known as electrolytic tin-coated sheet and is used where solderability is desired, appearance is important, or a degree of corrosion resistance under specific conditions is advantageous and coating mass can be specified. The coating is expressed as the total coating on both surfaces, in grams per square metre. The coating mass specified should be compatible with the desired service life, thickness of the base metal and the forming requirements involved. A designation system includes the coating designation, coating condition and quality. ISO 5950:2012 does not cover tinplate and blackplate.

ISO 16162:2012 applies to dimensional and shape tolerances for all cold-rolled steel sheet products.

ISO 16163:2012 applies to dimensional and shape tolerances for all continuously hot-dipped coated steel sheet products.

ISO 5001:2012 applies to cold-reduced carbon steel sheet of commercial and drawing qualities for vitreous enamelling, where the surface of the sheet and chemical composition of the base metal are of prime importance.

ISO 4999:2014 is applicable to cold-reduced carbon steel sheet of commercial, drawing, and structural qualities coated by a continuous hot-dip terne (lead alloy) coating process. It includes the group of products commonly known as terne plate or terne sheets (or, in the USA, as terne coated). Terne sheets are used where ease of solderability, a degree of corrosion resistance, or amenability to stamping, pressing, or deep drawing would be advantageous. Terne (lead alloy) coated steel sheet can be ordered in one of two ordering conditions: condition A, steel ordered to satisfy mechanical property requirements, and condition B, steel ordered to make an identified part.

This International Standard specifies the characteristics of hot-rolled twin-roll cast carbon steel sheet of commercial quality produced by the twin-roll cast process. Hot-rolled twin-roll cast steel sheet is suitable for many applications where the presence of oxide or scale or normal surface imperfections disclosed after removal of oxide or scale, are not objectionable. It is not suitable for applications where the surface is of prime importance. NOTE A steel sheet that is subjected to subsequent re-rolling is not covered by this International Standard. Commercial quality twin-roll cast steel sheet is intended for general fabrication purposes where sheet is used in the flat condition or for bending, moderate forming and welding operations

This International Standard specifies the characteristics of continuous hot-dip zinc-coated twin-roll cast steel sheet products of structural quality and high strength steel. The product is intended for applications where resistance to corrosion is of prime importance. The steel sheet is produced in a number of grades, coating mass, ordering conditions and surface treatments.

This International Standard specifies the characteristics of hot-rolled twin-roll cast steel sheet of structural quality and high strength steel. The product is intended for applications where specific mechanical properties are required. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures. This product is produced on a wide strip mill, not a plate mill. Structural quality twin-roll cast steel sheet is a carbon steel produced to specified mechanical properties and is available in a number of grades (see Table 5). High strength twin-roll cast steel sheet, strengthened by microalloys, is produced to specified mechanical properties and is available in a number of grades and classes (see Table 6).

This International Standard specifies the characteristics of continuous hot-dip zinc-coated twin-roll cast steel sheet of commercial quality manufactured using the twin-roll cast steel-making process. The product is intended for applications where resistance to corrosion is of prime importance. The steel sheet is produced in a number of coating mass, surface treatments and ordering conditions.

ISO 20805:2011 applies to continuous hot-rolled steel sheet of higher yield strength with improved formability. The steel is killed, made according to a fine-grain practice and has a suitable chemical composition, which includes microalloying elements, to provide improved formability. The steel can be treated to achieve inclusion control. The product is intended for applications where parts are to be fabricated requiring better formability than is provided by normal high-yield-strength steel sheet. It is generally used in the as-delivered condition. This product is commonly produced on a wide strip mill. Because of the combination of higher strength and improved formability, it is possible to obtain savings in mass along with better weldability. This product is commonly produced in the range of thicknesses greater than 6 mm to 25 mm, and widths of 600 mm and over, in coils. Hot-rolled sheet less than 600 mm wide can be slit from wide sheet and will be considered as sheet. ISO 20805:2011 does not cover steels intended for boilers or pressure vessels, or steels designated as commercial quality, drawing quality or structural quality, or steels rolled to cold-reduced products, or steels designated as weathering steels, having increased atmospheric corrosion resistance, or those products rolled on a plate mill.

ISO 5952:2011 applies to continuously hot-rolled steel sheet of structural quality with improved atmospheric corrosion resistance, also known as weather-resistant structural steel. The product is intended for applications where requirements are for mechanical properties and increased resistance to atmospheric corrosion. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures. This product is commonly produced in the range of thicknesses 1,6 mm up to and including 12,5 mm and widths of 600 mm and over, in coils and cut lengths. Hot-rolled sheet less than 600 mm wide can be slit from wide sheet and will be considered as sheet. ISO 5952:2011 does not cover the following steel qualities: steels intended for boilers or pressure vessels, or steels designated as commercial quality or drawing qualities (see ISO 3573); steels produced on reversing mills and designated with improved atmospheric corrosion resistance (see ISO 4952); steels designated with structural quality (see ISO 4995), or high yield strength structural quality (see ISO 4996); steels designated with higher yield strength with improved formability (see ISO 5951).

ISO 4999:2011 is applicable to cold-reduced carbon steel sheet of commercial, drawing and structural qualities coated by a continuous hot‑dip terne (lead alloy) coating process. It includes the group of products commonly known as terne plate or terne sheets (or in the USA as terne coated). Terne sheets are used where ease of solderability, a degree of corrosion resistance, or amenability to stamping, pressing or deep-drawing would be advantageous. Terne (lead alloy) coated steel sheet can be ordered in one of two ordering conditions: Condition A: steel ordered to satisfy mechanical property requirements. Condition B: steel ordered to make an identified part.

ISO 16160:2011 applies to dimensional and shape tolerances for all continuously hot-rolled steel sheet products.

ISO 14788:2011 is applicable to the minimum requirements for steel sheet, in coils and cut lengths, metallic-coated by the continuous hot-dip process, with zinc-5 % aluminium alloy coating. The product is intended for applications requiring corrosion resistance, formability and paintability. The steel sheet is produced in a number of qualities and grades, coating mass, surface treatments and coating conditions designed to be compatible with differing application requirements.

ISO 3575:2011 applies to carbon steel sheet of commercial and drawing qualities coated by the continuous hot‑dip zinc‑coating process. Zinc‑coated sheet is suitable for applications where resistance to corrosion is of prime importance. The steel sheet is produced in a number of qualities, coating mass, surface treatments and ordering conditions. Zinc- and zinc‑iron-alloy-coated steel sheet can be ordered in one of two ordering conditions. Condition A): steel ordered to satisfy mechanical property requirements. Condition B): steel ordered to make an identified part. ISO 3575:2011 does not cover steels designated as structural quality, which are covered in ISO 4998.

ISO 5000:2011 specifies the characteristics of cold-reduced carbon steel sheet of commercial and drawing qualities coated by a continuous hot-dip aluminium-silicon alloy coating process. Aluminium-silicon-coated steel sheets are used for heat-resisting applications and also where both corrosion and heat resistance are required. The steel sheet is produced in a number of qualities, coating mass, grades, surface treatments and conditions designed to be compatible with differing application requirements. Aluminium-silicon-coated steel sheet can be ordered in one of two ordering conditions: a) condition A): steel ordered to satisfy mechanical property requirements; b) condition B): steel ordered to make an identified part.

ISO 4998:2011 applies to continuous hot‑dip zinc‑ and zinc‑iron‑alloy‑coated carbon steel sheet of structural quality. The product is intended for applications where resistance to corrosion is of prime importance. The steel sheet is produced in a number of grades, coating mass, ordering conditions and surface treatments. ISO 4998:2011 does not cover steels designated as commercial quality, or drawing quality, which are covered in ISO 3575.

ISO 16163:2010 applies to dimensional and shape tolerances for all continuously hot-dipped coated steel sheet products.

ISO 16162:2010 applies to dimensional and shape tolerances for all continuously cold-rolled steel sheet products.