uns S41500 equivalent din 1.4313

UNS S41500 Equivalent: DIN 1.4313 Analysis

Published: November 7, 2025 | Updated: November 7, 2025By Gangsteel Engineering Team – 25+ Years in Stainless Steel Export Excellence

In the world of martensitic stainless steels, UNS S41500—often referred to as F6NM or AISI 415—stands out for its high strength, good weldability, and moderate corrosion resistance, making it a go-to material for pressure vessels, valves, and offshore components. A common question in global sourcing is its equivalence to DIN 1.4313 (also EN 1.4313 or X3CrNiMo13-4), the European designation for a similar soft martensitic steel.

 As a leading producer and exporter in China, Gangsteel has supplied thousands of tons of UNS S41500 with dual certifications to equivalents like DIN 1.4313, helping clients bridge U.S. and European specs seamlessly. This analysis confirms the equivalence, compares properties, and provides practical guidance for substitution, based on industry standards and our mill data.

From our experience, a 2024 European refinery project swapped UNS S41500 for DIN 1.4313 equivalents in valve forgings without retesting, saving 20% on certification while maintaining performance in sour environments. Yes, UNS S41500 is directly equivalent to DIN 1.4313, with nearly identical chemistry, mechanical properties, and applications, allowing interchangeability in most cases under ASTM A240/ASME SA240 and EN 10088-3/EN 10222-5. Minor differences in Mo/Ni ranges don't impact equivalence for general use, but verify for critical corrosion apps. Density remains consistent at 7.85 g/cm³ across both, supporting weight-efficient designs. Let's compare in detail.

Why Are UNS S41500 and DIN 1.4313 Equivalent?

UNS S41500 (U.S. standard) and DIN 1.4313 (German/European) share the same UNS number and are cross-referenced as equivalents in material databases and standards. Both are soft martensitic steels with low carbon for weldability, chromium for passivation, nickel for austenite stabilization, and molybdenum for pitting resistance. The equivalence allows direct substitution in plates under ASTM A240 and EN 10088-3, with similar heat treatment (quench and temper) yielding comparable mechanicals (yield ~620 MPa, hardness <32 HRB). For NACE sour service, both comply when hardness is controlled. Gangsteel's dual-certified stock (1-200mm thick) has enabled seamless swaps, priced at $2,600-2,800/ton FOB.

Property Comparison: UNS S41500 vs. DIN 1.4313

The materials are equivalent in density (7.85 g/cm³), PREN (18-22), and performance, with minor range variances.

Chemical Composition (% by Weight)

Equivalence holds as differences are within tolerance for most apps.

Mechanical Properties (Tempered Min Values)

Corrosion and Other Properties

• PREN: 18-22 for both – Good pitting resistance in chlorides/H2S.
• Density: 7.85 g/cm³ – Identical for weight calcs.
• Weldability: Both excellent with E410NiMo filler; PWHT at 620°C.

Applications: Shared Uses for Equivalents

Both grades suit sour service valves, petrochemical reactors, marine shafts, and power turbines. Gangsteel's dual-cert stock has supported hybrid U.S./EU projects.

Sourcing Equivalents: Practical Advice

Gangsteel offers UNS S41500 / DIN 1.4313 plates at $2,600-2,800/ton FOB, 1-200mm thick. Dual certs save on testing; contact for quotes.

FAQ: S41500 and DIN 1.4313 Equivalence Questions Answered

Q: Is UNS S41500 equivalent to DIN 1.4313?A: Yes, UNS S41500 is directly equivalent to DIN/EN 1.4313 (X3CrNiMo13-4), with similar chemistry, mechanical properties, and applications for high interchangeability.

Q: What are the differences between UNS S41500 and DIN 1.4313?A: Minor: DIN 1.4313 has slightly lower Mo (0.3-0.7% vs. 0.5-1.0%) and Ni (3.5-4.5% vs. 3.5-5.5%), but PREN (18-20 vs. 18-22) and mechanicals (yield 620 MPa) are comparable for equivalence.

Q: Can I substitute DIN 1.4313 for UNS S41500 in ASME specs?A: Yes, with high equivalence; dual-cert material from Gangsteel ensures compliance without issues.

Q: What standards cover S41500 and DIN 1.4313?A: S41500 under ASTM A240/A182; DIN 1.4313 under EN 10088-3/EN 10222-5. Equivalent for plates/forgings.

Q: Are there any limitations in equivalence between S41500 and DIN 1.4313?A: Minor for corrosion-critical apps (slightly lower Mo in 1.4313 may reduce PREN); otherwise, fully equivalent.

Q: What is the density of S41500 and its equivalents?A: 7.85 g/cm³ for both S41500 and DIN 1.4313—identical for weight calculations.

Q: Where can I source S41500 or DIN 1.4313?A: Gangsteel stocks both at $2,600-2,800/ton FOB, 1-200mm thick. Dual certs available.

Q: Is S41500 equivalent to other grades like 410 or 316?A: No—better than 410 in toughness/corrosion, but not as corrosion-resistant as 316; equivalents are specifically 1.4313-like grades.

Others relative stainless data of uns s41500