uns S41500 equivalent en X3CrNiMo13-4

UNS S41500 Equivalent: EN X3CrNiMo13-4 Analysis

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

UNS S41500, a martensitic stainless steel known for its high strength, good weldability, and moderate corrosion resistance, is commonly used in applications like pressure vessels, valves, and offshore equipment. Often referred to as F6NM or AISI 415, this grade's low-carbon design makes it heat-treatable and NACE-compliant for sour service.

A frequent query in international sourcing is its equivalence to EN X3CrNiMo13-4 (EN 1.4313), 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 EN 1.4313, enabling seamless swaps for clients bridging U.S. and European specs. This analysis affirms the equivalence, compares properties, and offers practical guidance, based on industry standards and our mill data.

From our 2024 exports to German petrochemical plants, clients used UNS S41500 as an equivalent to EN X3CrNiMo13-4 in reactor components, achieving identical performance in H2S environments without re-qualification, saving 15-20% on testing costs. Yes, UNS S41500 is directly equivalent to EN X3CrNiMo13-4 (EN 1.4313), with overlapping chemistry, mechanical properties, and applications under ASTM A240 and EN 10088-3. Minor variations in Mo/Ni don't affect equivalence for most uses, and density remains 7.85 g/cm³ for both. Let's compare in detail.

Why UNS S41500 and EN X3CrNiMo13-4 Are Equivalent

UNS S41500 (U.S. ASTM) and EN X3CrNiMo13-4 (European EN/DIN 1.4313) are equivalent soft martensitic steels, sharing low-carbon bases for weldability, chromium for passivation, nickel for austenite stability, and molybdenum for pitting resistance. This equivalence supports direct substitution in plates under A240 and EN 10088-3, with similar heat treatment yielding comparable yield (620 MPa) and hardness (<32 HRB). For NACE sour service, both comply when hardness is controlled. Gangsteel's dual-certified stock (1-200mm thick) has facilitated swaps, priced at $2,600-2,800/ton FOB.

Property Comparison: UNS S41500 vs. EN X3CrNiMo13-4

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

Chemical Composition (% by Weight)

Equivalence holds as differences are within tolerance.

Mechanical Properties (Tempered Min Values)

Corrosion and Other Properties

• PREN: 18-22 for both – Good pitting 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 risers, 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.