uns S41500 equivalent 13Cr-4Ni stainless

UNS S41500 Equivalent: 13Cr-4Ni Stainless Steel Guide

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

UNS S41500 is a martensitic stainless steel that falls under the 13Cr-4Ni family, known for its high strength, good toughness, and moderate corrosion resistance in applications like pressure vessels, valves, and offshore equipment. The "13Cr-4Ni" designation refers to its approximate composition of 13% chromium and 4% nickel, which provides a balance of hardenability, weldability, and resistance to environments like sour gas (H2S) while maintaining a soft martensitic structure after tempering. As a leading producer and exporter in China, Gangsteel has supplied thousands of tons of UNS S41500, often cross-referenced as equivalents within the 13Cr-4Ni category, to global projects where material substitution is key for cost and compliance.

The 13Cr-4Ni family, including UNS S41500, is designed for enhanced performance over basic 13Cr steels like 410, with nickel improving austenite stability and molybdenum (in S41500) boosting pitting resistance (PREN 18-22). Density at 7.85 g/cm³ makes it weight-efficient, and it's NACE MR0175-compliant for sour service when hardness is controlled (<32 HRB). If you're sourcing equivalents for ASTM A240 specs or European EN standards, UNS S41500 aligns closely with grades like EN 1.4313 (X3CrNiMo13-4), which is also a 13Cr-4Ni type. This guide confirms the equivalence, compares properties, and provides sourcing tips for 2025, where prices in China remain competitive at $2,600-2,800/ton FOB for stock plates (1-200mm thick).

Is UNS S41500 Equivalent to 13Cr-4Ni Stainless Steel?

Yes, UNS S41500 is a specific type of 13Cr-4Ni stainless steel, characterized by approximately 13% chromium and 4% nickel, with added molybdenum for improved corrosion resistance. The 13Cr-4Ni family refers to soft martensitic steels with this nominal composition, designed to provide better ductility and weldability than higher-carbon 13Cr grades like 410, while maintaining hardenability for strength (yield ~620 MPa) and toughness (impact 27 J at -18°C). UNS S41500 is the UNS designation for this alloy, often spec'd in ASTM A240 for plates, and it's equivalent to other 13Cr-4Ni variants like EN 1.4313 (X3CrNiMo13-4) or AFNOR Z6CND13-04. This equivalence stems from shared chemistry (low C, ~13% Cr, ~4% Ni, ~0.5% Mo) and properties, allowing substitution in most cases with minor adjustments for Mo content. Gangsteel's dual-cert stock confirms this, used in hybrid U.S./EU projects without issues.

Key Equivalents in the 13Cr-4Ni Family

The 13Cr-4Ni group includes several equivalents to UNS S41500, all soft martensitic steels with similar nominal composition for high interchangeability.

Equivalents Table

Gangsteel's stock includes dual-certified S41500/1.4313 plates (1-200mm thick), priced at $2,600-2,800/ton FOB, for seamless global use.

Property Comparison: UNS S41500 vs. 13Cr-4Ni Equivalents (e.g., 1.4313)

As part of the 13Cr-4Ni family, S41500 shares properties with equivalents, with density 7.85 g/cm³ and PREN 18-22 consistent across.

Chemical Composition (% by Weight)

Mechanical Properties (Tempered Min Values)

Corrosion and Other Properties

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

Applications: Shared for 13Cr-4Ni Equivalents

Both suit sour valves, reactors, marine shafts, power turbines. Gangsteel's dual-cert stock has supported hybrid projects.

Sourcing: Practical Advice

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

FAQ: S41500 and 13Cr-4Ni Equivalence Questions Answered

Q: Is UNS S41500 a type of 13Cr-4Ni stainless steel?A: Yes, UNS S41500 is a 13Cr-4Ni martensitic stainless steel, with ~13% Cr and ~4% Ni for balanced strength and corrosion resistance.

Q: What are the main equivalents for UNS S41500 in the 13Cr-4Ni family?A: Key equivalents include EN 1.4313 (X3CrNiMo13-4), AFNOR Z6CND13-04, JIS SUSF415, BS 416S21, and SS 2385—all 13Cr-4Ni types with similar properties.

Q: How does S41500 compare to other 13Cr-4Ni grades?A: S41500 has similar chemistry (Cr 11.5-14%, Ni 3.5-5.5%) and mechanicals (yield 620 MPa) to equivalents like 1.4313, with minor Mo differences affecting PREN slightly but not equivalence.

Q: Is S41500 better than basic 13Cr steels like 410?A: Yes, the 4Ni addition in S41500 improves toughness and weldability over 410 (13Cr no Ni/Mo), with better impact (27 J at -18°C) and PREN (18-22 vs. 13).

Q: What standards define S41500 as a 13Cr-4Ni steel?A: ASTM A240/A182 for S41500; EN 10088-3 for equivalents like 1.4313—all classify it as 13Cr-4Ni martensitic.

Q: Can I use 13Cr-4Ni equivalents like 1.4313 for S41500?A: Yes, with high interchangeability; Gangsteel's dual-cert material ensures compliance.

Q: What is the density of S41500 as a 13Cr-4Ni steel?A: 7.85 g/cm³, consistent with 13Cr-4Ni equivalents for weight calculations.

Q: Where can I buy S41500 or 13Cr-4Ni equivalents?A: Gangsteel stocks S41500 and equivalents like 1.4313 at $2,600-2,800/ton FOB, 1-200mm thick. Contact for quotes.