STS316 – Molybdenum-Enhanced Austenitic Alloy For Superior Corrosion Resistance In Seawater Environments

Overview

STS316 is a widely used austenitic stainless steel, distinguished by the addition of molybdenum (2.00-3.00%) which significantly enhances its resistance to pitting and crevice corrosion, especially in chloride-containing environments such as seawater and brine. With 16.00-18.00% chromium and 10.00-14.00% nickel, it forms a stable austenitic structure, making it non-magnetic in the annealed state. It offers excellent ductility, formability, and weldability, with no need for post-weld annealing in most cases. Compared to STS304, STS316 provides higher corrosion resistance and mechanical strength, making it suitable for harsh corrosive environments in marine, chemical, and food processing industries.

Chemical Composition (wt%)

C ≤ 0.08, 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

Typical Mechanical Properties (Annealed Condition)

Tensile Strength (Rm): ≥ 520 MPa; Yield Strength (Rp0.2): ≥ 205 MPa; Elongation (A): ≥ 40%; Brinell Hardness (HB): ≤ 187

Core Advantages

Molybdenum addition enhances pitting and crevice corrosion resistance in chloride environments; excellent general corrosion resistance to organic acids, alkalis, and neutral solutions; non-magnetic in annealed state; superior ductility and formability for complex fabrication; good weldability with no post-weld annealing required; higher strength and corrosion resistance than STS304.

Applications

Marine engineering components, seawater treatment equipment, chemical processing tanks and piping, food processing machinery, pharmaceutical equipment, coastal architectural structures, and medical devices requiring high corrosion resistance.

Equivalent Grades

EN 1.4401, UNS S31600, GB 06Cr17Ni12Mo2, AISI 316, SUS316

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.