UNS S31600 – Molybdenum-Alloyed Austenitic Steel For Marine & Chemical Corrosion Resistance

Overview

UNS S31600 is a standard austenitic stainless steel grade, characterized by the integration of molybdenum (2.00-3.00%) to enhance its resistance to pitting and crevice corrosion, especially in chloride-rich environments such as seawater, brine, and chemical solutions. Composed of 16.00-18.00% chromium and 10.00-14.00% nickel, it forms a stable austenitic microstructure that ensures non-magnetic properties in the annealed state. This grade exhibits outstanding ductility, formability, and weldability, allowing for easy fabrication into various product forms including sheets, pipes, bars, and fittings. Unlike ultra-low carbon variants, its carbon content (≤ 0.08%) balances corrosion resistance and mechanical strength, making it a preferred choice for general corrosive environments where post-weld annealing is not always required.

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 provides excellent pitting and crevice corrosion resistance in chloride media; stable austenitic structure ensures non-magnetic properties and high ductility; good weldability with minimal post-processing; balanced carbon content for optimal strength and corrosion performance; versatile for diverse fabrication processes and product forms.

Applications

Marine hardware and components, chemical processing tanks, food and beverage processing equipment, pharmaceutical machinery, coastal architectural structures, and industrial piping systems exposed to mild to moderate corrosive environments.

Equivalent Grades

EN 1.4401, STS316, 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.