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Designation Cross-Reference

S31603 — ASTM Equivalent

Holding a datasheet that specifies S31603 (UNS)? The valve-grade equivalent, its properties, and certified supply of the matching ASTM grade.

What is the ASTM equivalent of S31603?

S31603 is a UNS designation corresponding to ASTM A182 Grade F316L / UNS S31603 (Stainless Steel 316L (Low Carbon Forged)) for industrial valve service. The full grade data is below - equivalence is by nominal chemistry and mechanical class, so confirm composition and heat-treat condition against the governing standard before substituting in critical service.

Stainless Steel 316L (Low Carbon Forged) - forged form.

Service temperature-196°C to +870°C
Nominal compositionC ≤ 0.03%, Cr 16–18%, Ni 10–14%, Mo 2–3%, Mn ≤ 2.00%, Si ≤ 1.00%. UNS S31603.

Typical service: Pharmaceutical water systems: WFI, PW, HPW, clean steam; Food and beverage processing: dairy, beverages, edible oils; Chemical plant: organic acids, mild inorganic acids, solvents

Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026

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Need valves in S31603 / its ASTM equivalent?

We supply A182 Grade F316L / UNS S31603 valves - the S31603 equivalent - with EN 10204 3.1 material certification. Share the datasheet for a 24-hour quote.

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