STS316H – High-Carbon Austenitic Alloy For High-Temperature Creep Resistance

Overview

STS316H is a high-carbon austenitic stainless steel, specifically designed for high-temperature applications requiring excellent creep strength and oxidation resistance. With a carbon content of 0.04-0.10%, it provides higher high-temperature strength and creep resistance compared to STS316 and STS316L, making it suitable for continuous service at temperatures above 595°C. It retains the molybdenum addition (2.00-3.00%) for corrosion resistance and contains 16.00-18.00% chromium and 10.00-14.00% nickel to maintain a stable austenitic structure. It is non-magnetic, has good weldability, and is widely used in high-temperature industrial equipment such as boilers and heat exchangers.

Chemical Composition (wt%)

C: 0.04-0.10, Cr: 16.00-18.00, Ni: 10.00-14.00, Mo: 2.00-3.00, Mn ≤ 2.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.030, N ≤ 0.10

Typical Mechanical Properties (Annealed Condition)

Tensile Strength (Rm): ≥ 520 MPa; Yield Strength (Rp0.2): ≥ 205 MPa; Elongation (A): ≥ 35%; Brinell Hardness (HB): ≤ 201

Core Advantages

High carbon content enhances high-temperature creep strength and mechanical stability; excellent oxidation resistance at elevated temperatures (continuous service up to 700°C); molybdenum addition ensures corrosion resistance in chloride environments; non-magnetic; good weldability with proper preheating; suitable for high-temperature pressure vessels and heat-resistant components.

Applications

High-temperature boilers, heat exchangers, steam turbines, petrochemical cracking equipment, nuclear power plant components, and other high-temperature industrial equipment requiring creep resistance and corrosion protection.

Equivalent Grades

EN 1.4406, UNS S31609, GB 07Cr17Ni12Mo2, AISI 316H, SUS316H

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.