ASTM B718-22

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it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B718 − 00 (Reapproved 2016) B718 − 22
Standard Specification for
Nickel-Chromium-Molybdenum-Cobalt-Tungsten-Iron-Silicon
Alloy (UNS N06333) Plate, Sheet, and StripPlate
This standard is issued under the fixed designation B718; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
1.1 This specification covers wrought alloy UNS N06333 plate, sheet, and strip plate intended for heat resisting applications and
general corrosive service.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet
(SDS) for this product/material as provided by the manufacturer, to establish appropriate safety safety, health, and healthenvi-
ronmental practices, and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
B880 Specification for General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys
E8E8/E8M Test Methods for Tension Testing of Metallic Materials [Metric] E0008_E0008M
E10 Test Method for Brinell Hardness of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness,
Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness
E1473 Test Methods for Chemical Analysis of Nickel, Cobalt and High-Temperature Alloys
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 plate, n—material ⁄16 in. (4.76 mm) and over in thickness and over 10 in. (254) mm in width.
This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.07 on Refined
Nickel and Cobalt and Their Alloys.
Current edition approved June 1, 2016April 1, 2022. Published June 2016April 2022. Originally approved in 1983. Last previous edition approved in 20112016 as
B718 – 00 (2011).(2016). DOI: 10.1520/B0718-00R16.10.1520/B0718-22.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B718 − 22
3.1.2 sheet, n—material under ⁄16 in. (4.76 mm) in thickness and 24 in. (610 mm) and over in width.
3.1.3 strip, n—material under ⁄16 in. (4.76 mm) in thickness and under 24 in. (610 mm) in width.
4. Ordering Information
4.1 It is the responsibility of the purchaser to specify all requirements that are necessary for the safe and satisfactory performance
of material ordered under this specification. Examples of such requirements include but are not limited to the following:
4.1.1 Alloy name or UNS number.
4.1.2 Quantity.
4.1.3 ASTM Designation and year of issue.
4.1.4 Form (plate, sheet, or strip).
4.1.4 Dimensions—Dimensions—Thickness, Width,Thickness, width, and Length.length.
4.1.6 Finish (Section 9).
4.1.5 Certification—State if certification is required (Section 16).
4.1.6 Samples for Product (Check) Analysis—State whether samples shall be furnished.
4.1.7 Purchaser Inspection—If a purchaser wishes to witness tests or inspections of material at the place of manufacture, the
purchase order must so state indicating which tests or inspections are to be witnessed.
5. Materials and Manufacture
5.1 All material shall be furnished in the annealed condition.
6. Chemical Requirements
6.1 The material shall conform to the requirements as to chemical composition specified in Table 1.
6.2 If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis
variations in Specification B880.
7. Mechanical and Other Requirements
7.1 The mechanical properties of the material at room temperature shall conform to those shown in Table 2.
TABLE 1 Chemical Requirements
Element Composition Limits, %
Carbon 0.10 max
Manganese 2.0 max
Phosphorus 0.03
Sulfur 0.03
Silicon 1.5 max
Chromium 24.0–27.0
Nickel 44.0–48.0
Molybdenum 2.5–4.0
Cobalt 2.5–4.0
Tungsten 2.5–4.0
A
Iron Remainder
A
Element may be determined arithmetically by difference.
B718 − 22
TABLE 2 Mechanical Properties
Yield Strength, 0.2 % Offset, Min Elongation in 2 in. or 50 mm, or
A
Condition Tensile Strength, Min psi (MPa) Hardness
psi (MPa) 4D, Min %
Annealed 80 000 (551) 35 000 (241) 30 75 to 95 HRB
A
Hardness values are informative only and not to be construed as the basis for acceptance.
8. Permissible Variations in Dimensions
8.1 Sheet, shall conform to the variations in dimensions specified in Tables 3-5, inclusive.
8.2 Cold-Rolled Strip, shall conform to the permissible variations in dimensions as specified in Tables 6-10 inclusive.
8.1 Plate, shall conform to the permissible variations in dimensions specified in Tables 11-3-168, inclusive.
8.2 Sheet, Strip, and Plate—Material with No. 1 finish Plate may be ground to remove surface defects, provided such grinding
does not reduce the thickness, width, or length at any point beyond the permissible variations in dimensions.
9. Workmanship, Finish, and Appearance
9.1 The material shall be uniform in quality and temper, smooth, commercially straight, and free from injurious imperfections.
9.2 Available finishes are:Plate will be supplied in the hot rolled, annealed, and descaled condition.
9.2.1 Sheet—No. 1 finish; hot rolled, annealed, and descaled, and No. 2 D finish; cold rolled, dull finish.
9.2.2 Strip—No. 1 finish; cold rolled, annealed, and descaled.
9.2.3 Plate—Hot rolled, annealed, and descaled.
10. Sampling
10.1 Lot Definitions:
10.1.1 A lot for chemical analysis shall consist of one heat.
10.1.2 A lot for mechanical properties shall consist of material from one heat of the same condition and nominal thickness.
10.2 Test-Material Selection:
10.2.1 Chemical Analysis—Representative samples from each lot shall be taken during pouring or subsequent processing.
A
TABLE 113 Permissible Variations in Thickness for Plates
Width, in. (mm)
Over 84 (2134) Over 120 (3048)
Specified Thickness, in. (mm) To 84 (2134), incl to 120 (3048), to 144 (3658), Over 144 (3658)
incl incl
A,B
Tolerance Over specified Thickness, in. (mm)
3 3
⁄16 (4.76) to ⁄8 (9.52). excl 0.045 (1.14) 0.050 (1.27) . .
3 3
⁄8 (9.52) to ⁄4 (19.05), excl 0.055 (1.40) 0.060 (1.52) 0.075 (1.90) 0.090 (2.29)
⁄4 (19.05) to 1 (25.40), excl 0.060 (1.52) 0.065 (1.65) 0.085 (2.16) 0.100 (2.54)
1 (25.40) to 2 (50.80), excl 0.070 (1.78) 0.075 (1.90) 0.095 (2.41) 0.115 (2.92)
2 (50.80) to 3 (76.20), excl 0.125 (3.18) 0.150 (3.81) 0.175 (4.44) 0.200 (5.08)
3 (76.20) to 4 (101.6), excl 0.175 (4.44) 0.210 (5.33) 0.245 (6.22) 0.280 (7.11)
A 3
Thickness is measured along the longitudinal edges of the plate at least ⁄8 in. (9.52 mm), but not more than 3 in. (76.20 mm), from the edge.
B
For circles, the over thickness tolerances in this table apply to the diameter of the circle corresponding to the width ranges shown. For plates of irregular shape, the over
thickness tolerances apply to the greatest width corresponding to the width ranges shown. For plates up to 10 in. (254.0 mm), incl, in thickness, the tolerance under the
specified thickness is 0.010 in. (0.25 mm).
B718 − 22
A,B
TABLE 124 Width and Length Tolerances for Plates
Tolerance Over Specified Width and Length for Given Width, Length, and Thickness, in.
3 3 1 1
Width, in. Length, in. Under ⁄8 in. ⁄8 to ⁄2 in., incl, in Thickness Over ⁄2 in. in Thickness
Width Length Width Length Width Length
1 3 3 1 5 3
48 and under 144 and under ⁄8 ⁄16 ⁄16 ⁄4 ⁄16 ⁄8
3 1 1 5 3 7
Over 48 to 60, incl ⁄16 ⁄4 ⁄4 ⁄16 ⁄8 ⁄16
1 5 5 3 7 1
Over 60 to 84, incl ⁄4 ⁄16 ⁄16 ⁄8 ⁄16 ⁄2
5 3 3 7 1 9
Over 84 to 108, incl ⁄16 ⁄8 ⁄8 ⁄16 ⁄2 ⁄16
3 7 7 1 5 11
Over 108 ⁄8 ⁄16 ⁄16 ⁄2 ⁄8 ⁄16
3 3 1 1 5 5
48 and under over 144 to 240 ⁄16 ⁄8 ⁄4 ⁄2 ⁄16 ⁄8
1 7 5 5 3 3
Over 48 to 60, incl ⁄4 ⁄16 ⁄16 ⁄8 ⁄8 ⁄4
3 1 7 11 1 3
Over 60 to 84, incl ⁄8 ⁄2 ⁄16 ⁄16 ⁄2 ⁄4
7 9 1 3 5 7
Over 84 to 108, incl ⁄16 ⁄16 ⁄2 ⁄4 ⁄8 ⁄8
1 5 5 7 11
Over 108 ⁄2 ⁄8 ⁄8 ⁄8 ⁄16 1
1 1 5 5 3 3
48 and under over 240 to 360 ⁄4 ⁄2 ⁄16 ⁄8 ⁄8 ⁄4
5 5 3 3 1 3
Over 48 to 60, incl ⁄16 ⁄8 ⁄8 ⁄4 ⁄2 ⁄4
7 11 1 3 5 7
Over 60 to 84, incl ⁄16 ⁄16 ⁄2 ⁄4 ⁄8 ⁄8
9 3 5 7 3
Over 84 to 108, incl ⁄16 ⁄4 ⁄8 ⁄8 ⁄4 1
5 7 11 7
Over 108 ⁄8 ⁄8 ⁄16 1 ⁄8 1
7 1 1 1 5 3
60 and under over 360 to 480 ⁄16 1 ⁄8 ⁄2 1 ⁄4 ⁄8 1 ⁄8
1 1 5 3 3 1
Over 60 to 84, incl ⁄2 1 ⁄4 ⁄8 1 ⁄8 ⁄4 1 ⁄2
9 1 3 3 7 1
Over 84 to 108, incl ⁄16 1 ⁄4 ⁄4 1 ⁄8 ⁄8 1 ⁄2
3 3 7 1 5
Over 108 ⁄4 1 ⁄8 ⁄8 1 ⁄2 1 1 ⁄8
7 1 1 1 5 5
60 and under over 480 to 600 ⁄16 1 ⁄4 ⁄2 1 ⁄2 ⁄8 1 ⁄8
1 3 5 1 3 5
Over 60 to 84, incl ⁄2 1 ⁄8 ⁄8 1 ⁄2 ⁄4 1 ⁄8
5 3 3 1 7 5
Over 84 to 108, incl ⁄8 1 ⁄8 ⁄4 1 ⁄2 ⁄8 1 ⁄8
3 1 7 5 3
Over 108 ⁄4 1 ⁄2 ⁄8 1 ⁄8 1 1 ⁄4
1 3 5 7 3 7
60 and under over 600 ⁄2 1 ⁄4 ⁄8 1 ⁄8 ⁄4 1 ⁄8
5 3 3 7 7 7
Over 60 to 84, incl ⁄8 1 ⁄4 ⁄4 1 ⁄8 ⁄8 1 ⁄8
5 3 3 7 7 7
Over 84 to 108, incl ⁄8 1 ⁄4 ⁄4 1 ⁄8 ⁄8 1 ⁄8
7 3 1 1
Over 108 ⁄8 1 ⁄4 1 2 1 ⁄8 2 ⁄4
Tolerance Over Specified Width and Length for Given Width, Length, and Thickness, mm
Width, mm Length, mm Under 9.5 mm 9.5 to 12.7 mm, incl in Thickness Over 12.7 mm in Thickness
Width Length Width Length Width Length
1219 mm and under 3.2 4.8 4.8 6.4 7.9 9.5
Over 1219 to 1524, incl 3658 and under 4.8 6.4 6.4 7.9 9.5 11.1
Over 1524 to 2134, incl 6.4 7.9 7.9 9.5 11.1 12.7
Over 2134 to 2743, incl 7.9 9.5 9.5 11.1 12.7 14.3
Over 2743 9.5 11.1 11.1 12.7 15.9 17.5
1219 mm and under 4.8 9.5 6.4 12.7 7.9 15.9
Over 1219 to 1524, incl over 3658 to 6096 6.4 11.1 7.9 15.9 9.5 19.1
Over 1524 to 2134, incl 9.5 12.7 11.1 17.5 12.7 19.1
Over 2134 to 2743, incl 11.1 14.3 12.7 19.1 15.9 22.2
Over 2743 12.7 15.9 15.9 22.2 17.5 25.4
1219 mm and under 6.4 12.7 7.9 15.9 9.5 19.1
Over 1219 to 1524, incl over 6096 to 9144 7.9 15.9 9.5 19.1 12.7 19.1
Over 1524 to 2134, incl 11.1 17.5 12.7 19.1 15.9 22.2
Over 2134 to 2743, incl 14.3 19.1 15.9 22.2 19.1 25.4
Over 2743 15.9 22.2 17.5 25.4 22.2 25.4
1524 mm and under 11.1 28.6 12.7 31.8 15.9 34.9
Over 1524 to 2134, incl over 9144 to 12 192 12.7 31.8 15.9 34.9 19.1 38.1
Over 2134 to 2743, incl 14.3 31.8 19.1 34.9 22.2 38.1
Over 2743 19.1 34.9 22.2 38.1 25.4 41.3
1524 mm and under 11.1 31.8 12.7 38.1 15.9 41.3
Over 1524 to 2134, incl over 12 192 to 15 240 12.7 34.9 15.9 38.1 19.1 41.3
Over 2134 to 2743, incl 15.9 34.9 19.1 38.1 22.2 41.3
Over 2743 19.1 38.1 22.2 41.3 25.4 44.3
1524 mm and under 12.7 44.5 15.9 47.6 19.1 47.6
Over 1524 to 2134, incl over 15 240 15.9 44.5 19.1 47.6 22.2 47.6
Over 2134 to 2743, incl 15.9 44.5 19.1 47.6 22.2 47.6
Over 2743 22.2 44.5 25.4 50.8 28.6 57.2
A
The tolerance under specified width and length is ⁄4 in. (6.4 mm).
B
Rectangular plates over 1 in. (25.4 mm) in thickness are not commonly sheared and are machined or otherwise cut to length and width or produced in the size as rolled,
uncropped.
B718 − 22
TABLE 135 Camber Tolerance for Plates
Tolerance = ⁄8 in. (3.2 mm) × [ft(cm) of length/5 ft (152 cm)]
TABLE 146 Flatness Tolerances for Plates, in.
Flatness Tolerance (Deviation from A Flat Horizontal Surface) for Thickness and Width Given, in.
Width, in.
Specified Thickness, in.
Over 48
48 and 60 to 72, 72 to 84, 84 to 96, 96 to 108, 108 to 120, 120 to 144, 144 and
to 60,
Under excl excl excl excl excl excl Over
excl
3 1 3 1 1 3 5 5 7
⁄16 to ⁄4, excl ⁄4 1 ⁄16 1 ⁄4 1 ⁄8 1 ⁄8 1 ⁄8 1 ⁄8 2
1 3 11 3 15 1 3 7 9 7
⁄4 to ⁄8, excl ⁄16 ⁄4 ⁄16 1 ⁄8 1 ⁄8 1 ⁄16 1 ⁄16 1 ⁄8
3 1 1 9 11 3 15 1 1 7
⁄8 to ⁄2, excl ⁄2 ⁄16 ⁄16 ⁄4 ⁄16 1 ⁄8 1 ⁄4 1 ⁄16
1 3 1 9 5 5 13 1 1 1 3
⁄2 to ⁄4
...