1.4550 — ASTM Equivalent
Holding a datasheet that specifies 1.4550 (EN)? The valve-grade equivalent, its properties, and certified supply of the matching ASTM grade.
What is the ASTM equivalent of 1.4550?
1.4550 is a EN designation corresponding to ASTM A182 F347 (Stabilised 347 Stainless Steel (Forged F347)) 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 F347
Stainless SteelStabilised 347 Stainless Steel (Forged F347) - forged form.
Typical service: Nuclear power (BWR/PWR) - piping valves in reactor coolant auxiliary systems; F347 resists sensitisation in high-temperature radioactive water service; Ethylene cracker and catalytic reformer - sustained temperatures above 450°C where 316L would sensitise; Hot hydrogen service (hydroprocessing) - niobium stabilisation prevents intergranular attack under Nelson curve conditions
Connected Engineering
Need valves in 1.4550 / its ASTM equivalent?
We supply A182 F347 valves - the 1.4550 equivalent - with EN 10204 3.1 material certification. Share the datasheet for a 24-hour quote.