Grade 316H Austenitic Stainless Steel – High-Temperature Chloride-Resistant Alloy

Description

Grade 316H is the high-carbon variant of Grade 316, engineered to combine the chloride corrosion resistance of 316 with enhanced high-temperature strength and creep resistance. With a carbon range of 0.04-0.10%, it outperforms 316 and 316L in long-term service at temperatures above 500°C, while retaining the molybdenum-enhanced corrosion protection that makes the 316 series ideal for harsh environments. Unlike 304H, 316H offers superior resistance to chloride pitting and crevice corrosion, making it suitable for high-temperature applications in corrosive settings-such as petrochemical plants and power generation facilities. It remains non-magnetic at room temperature, has good weldability, and provides reliable mechanical performance under sustained thermal stress, making it a specialized solution for high-heat, corrosive environments.

Chemical Composition (wt%)

C: 0.04-0.10, Cr: 16.00-18.50, Ni: 10.00-14.00, Mo: 2.00-3.00, Mn ≤ 2.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.030

Mechanical Properties

Tensile Strength ≥ 520 MPa, Yield Strength ≥ 205 MPa, Elongation ≥ 40%, Hardness ≤ 215 HB

Advantages

Superior high-temperature creep strength vs. 316/316L; excellent chloride corrosion resistance; good oxidation resistance at elevated temperatures; non-magnetic; weldable; suitable for high-heat, corrosive pressure components.

Applications

High-temperature chemical piping, petrochemical pressure vessels, boiler tubes, heat exchangers, power generation equipment, and high-heat corrosive industrial systems.

Equivalent Grades

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