Designation Cross-Reference

S30400 — ASTM Equivalent

Holding a datasheet that specifies S30400 (UNS)? The valve-grade equivalent, its properties, and certified supply of the matching ASTM grade.

What is the ASTM equivalent of S30400?

S30400 is a UNS designation corresponding to ASTM A182 F304 (304 Stainless Steel (Forged F304)) 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.

A182 F304

Stainless Steel

304 Stainless Steel (Forged F304) - forged form.

Service temperature-196°C to +538°C

Nominal compositionC ≤ 0.08%, Mn ≤ 2.00%, Si ≤ 1.00%, Cr 18.00–20.00%, Ni 8.00–11.00%, P ≤ 0.045%, S ≤ 0.030%

Typical service: Food and beverage processing - dairy, beverage, food plants (EHEDG/3-A hygiene compliance); Pharmaceutical utility water - purified water, WFI distribution loops; Mild chemical service - dilute acids, alkalis below corrosion thresholds

Also designated:S30400 [UNS]1.4301 (X5CrNi18-10) [EN]304S31 [BS]SUS304 [JIS]10 Cr 18 Ni 9 [IS]

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

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Engineering references

A182 F304 full grade page304 Stainless Steel (Forged F304)Equivalence MatrixAll 43 grades across 7 systems Designation lookup directoryEvery foreign designation indexed