International Material Cross-Reference Charts for Metal Alloys

International Material Cross-Reference Charts

International material cross-reference charts help engineers, buyers, and quality teams identify potentially similar alloy designations across UNS, AISI, ASTM, AMS, EN, DIN, German material numbers, JIS, and other standards systems.

These charts are intended for preliminary engineering and sourcing review. A listed grade should not be treated as an automatically interchangeable equivalent. Final approval should compare chemistry, product form, heat treatment, mechanical properties, dimensional requirements, testing, supplementary requirements, and service environment.

How to Use Material Cross-Reference Charts

• Match the product form: castings, forgings, plate, bar, tube, sheet, and fasteners may use different standards for nominally similar alloys.
• Compare chemistry: review full element ranges, residual limits, interstitial limits, and special alloy additions.
• Compare condition: annealed, solution treated, aged, quenched and tempered, normalized, or cold-worked conditions may not be equivalent.
• Compare properties: verify minimum tensile, yield, elongation, hardness, impact, fatigue, corrosion, or creep requirements.
• Review testing: NDT, corrosion testing, grain size, ferrite, cleanliness, heat treatment, and supplementary requirements may differ.
• Obtain approval: the design authority or customer should approve any material substitution before production.

Stainless Steel and Duplex Cross-Reference Chart

The designations below are commonly compared, but wrought and cast specifications are shown together only for orientation. Verify the exact product form and governing standard.

See our stainless steel and carbon steel guide, stainless steel machining, and duplex machining resources for additional material and process context.

Nickel Alloy and Titanium Cross-Reference Chart

Trade names such as Inconel and Hastelloy are commonly associated with specific UNS designations, but product-form standards and heat-treatment requirements still require separate verification.

See our superalloys and exotic metals and titanium alloys material guides for manufacturing and specification context.

Ductile Iron and Aluminum Cross-Reference Chart

Strength classes and alloy designations may differ in minimum elongation, tensile properties, chemistry, heat treatment, casting process, and test-bar requirements.

See our aluminum and copper alloys guide, A356-T6 casting, and aluminum die casting resources for additional context.

Material Equivalency Verification Workflow

1. Identify the governing requirement: confirm the original material standard, grade, product form, revision, and supplementary requirements.
2. Compare the proposed grade: review chemistry, properties, condition, dimensions, heat treatment, and testing.
3. Review manufacturing compatibility: confirm casting, forging, machining, welding, heat treatment, and finishing requirements.
4. Define verification: determine whether MTR review, PMI, chemistry, mechanical testing, NDT, or corrosion testing is required.
5. Obtain formal approval: document customer, engineering, or design-authority approval before substitution.

Important Limitations of Cross-Reference Tables

• Nearest equivalent does not mean identical: chemistry and property ranges may overlap without being the same.
• Cast and wrought grades differ: similar alloy families often use different designations and acceptance criteria.
• Standard revisions change: always verify the latest applicable revision named by the purchase order.
• Trade names require care: proprietary names should be tied to the correct UNS and product specification.
• Service requirements control: corrosion, pressure, fatigue, medical, aerospace, nuclear, or sour-service applications may prohibit substitution without formal review.