Designation Cross-Reference

1.7357 — ASTM Equivalent

Holding a datasheet that specifies 1.7357 (EN)? The valve-grade equivalent, its properties, and certified supply of the matching ASTM grade.

What is the ASTM equivalent of 1.7357?

1.7357 is a EN designation corresponding to ASTM A217 Grade WC6 (1¼Cr½Mo Alloy Steel WC6) 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.

A217 Grade WC6

Chrome-Moly / Alloy Steel

1¼Cr½Mo Alloy Steel WC6 - cast form.

Service temperature-29°C to +595°C

Nominal compositionC ≤ 0.20%, Cr 1.00–1.50%, Mo 0.45–0.65%, Mn ≤ 0.70%, Si ≤ 0.60%. Normalised and tempered.

Typical service: Steam service 400–595°C (power generation, refinery steam headers); High-temperature hydrocarbon vapour service; Catalytic reformer and hydrotreater hot section

Also designated:GX12CrMo5 [EN]1.7357 [EN]GS-17CrMo 5 5 [DIN]625 [BS 1504]

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

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A217 WC9 Chrome-Moly

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We supply A217 Grade WC6 valves - the 1.7357 equivalent - with EN 10204 3.1 material certification. Share the datasheet for a 24-hour quote.

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Engineering references

A217 Grade WC6 full grade page1¼Cr½Mo Alloy Steel WC6 Equivalence MatrixAll 43 grades across 7 systems Designation lookup directoryEvery foreign designation indexed