SIST EN 3354:2014

SIST EN 3354:2014 is the Slovenian adoption of EN 3354:2013 for aerospace titanium sheet. It specifies the requirements for titanium alloy Ti-6Al-4V in the annealed condition, supplied as sheet for superplastic forming with thickness a ≤ 6 mm. It is written for people who need a procurement, inspection or acceptance basis for this aerospace material.

What does SIST EN 3354:2014 specify?

SIST EN 3354:2014 specifies the requirements for a specific aerospace sheet product: Ti-6Al-4V, annealed, for superplastic forming, within the stated thickness limit. In practice, it is a material specification for buying, making and checking this sheet.

The document is organized with a scope clause, a normative references clause, and then a detailed requirements table. That table covers material designation, chemical composition, melting route, product form, production method, dimensions, delivery condition, mechanical properties, microstructure, grain size, defect checks, surface condition, contamination, marking, dimensional inspection and product qualification.

What are the key requirements of SIST EN 3354:2014?

• Product definition and form - SIST EN 3354:2014 applies to Ti-6Al-4V sheet produced by rolling and intended for superplastic forming. For a user, this fixes the exact material form and prevents confusion with other titanium products or other supply conditions.

• Chemical composition and melting - The standard gives an elemental composition control for the alloy and points the melting route to EN 4800-001. This matters because the supplier must control chemistry and melting practice, not just the final sheet appearance.

• Delivery condition - SIST EN 3354:2014 requires the material to be delivered in the annealed condition, with a specified heat treatment and cooling route, and it assigns the delivery condition code U according to EN 2032-2. In practice, this tells the supplier and purchaser how the sheet is to be supplied and documented.

• Mechanical properties - The standard sets tensile and bending requirements for different thickness bands and for test pieces taken in the L and LT directions at ambient temperature. For the reader, this means acceptance depends on measured performance in the sheet orientation that matters after rolling.

• Microstructure and grain size - SIST EN 3354:2014 requires the microstructure to be checked with the method in EN 3114-004 and grain size with EN 2002-8. The document also links these checks to acceptance criteria for the two-phase titanium structure used in superplastic forming, which is important because forming behaviour depends strongly on microstructure.

• Defects, surface condition and contamination - External defects, internal defects, surface contamination and dimensional inspection are controlled by EN 4800-001, while surface roughness is assessed using ISO 4288. This gives the buyer a way to check not only properties but also sheet quality and cleanability.

• Superplastic forming capability and qualification - The standard states that superplastic forming capability is to be agreed between manufacturer and purchaser, and product qualification is also to be agreed. That means the document gives a framework, but the final forming qualification still has to be defined for the intended application.

What terms does SIST EN 3354:2014 define?

• Ti-6Al-4V - The titanium alloy named by the standard, used here for aerospace sheet.
• a - The sheet thickness used in the thickness limit and in the property bands.
• Delivery condition code U - The code used for the annealed supply condition.
• Rp0,2 - Proof stress at 0.2% permanent strain, used as a tensile acceptance property.
• Rm - Tensile strength, the maximum stress reached in the tensile test.
• A50 mm - Elongation measured on a 50 mm gauge length.
• L and LT - Test-piece directions used to check properties in the rolling direction and the transverse direction.
• Ra - Arithmetic mean surface roughness.

Who uses SIST EN 3354:2014?

SIST EN 3354:2014 is used by aerospace material suppliers, sheet manufacturers, purchasers, quality managers and testing laboratories. They use it for procurement specifications, heat-treatment control, tensile and metallographic testing, surface and dimensional inspection, and product qualification for aerospace sheet.

What changed in SIST EN 3354:2014 from the previous edition?

SIST EN 3354:2014 is the Slovenian adoption of EN 3354:2013.

Which standards are used with SIST EN 3354:2014?

• EN 2002-8 - Gives the grain-size test method used in the document.
• EN 2032-2 - Provides the coding of metallurgical condition in delivery condition.
• EN 2338 - Gives dimensional requirements for titanium and titanium alloy sheet.
• EN 3114-004 - Gives the microstructure test method for sheet for superplastic forming.
• EN 4258 - Sets the general organization of aerospace metallic material standards.
• EN 4500-004 - Gives drafting and presentation rules for titanium and titanium alloy material standards.
• EN 4800-001 - Provides the technical specification framework used for plate, sheet and strip.
• ISO 4288 - Gives the rules for assessing surface texture by the profile method.

What does the SIST EN 3354:2014 document contain?

The document contains a requirements table that ties each property or inspection item to a clause, method or reference standard. It brings together chemistry, heat treatment, tensile properties, bending, microstructure, grain size, defect control, surface roughness, surface contamination, marking, dimensional inspection and qualification in one place.

It also points the reader to the linked test and inspection standards used to verify the sheet. For practical use, that means the document is less about design calculations and more about defining what must be measured, inspected and agreed before aerospace sheet can be accepted.