S13Cr-95

Stainless Steel

S13Cr-95

Specialty steel grade. Super 13Cr, CO2/H2S resistant OCTG. (API 5CT; equiv 13Cr / S41426 / HP2-13Cr). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.03
CR12
NI3.5
MO1.5
V0.05

Mechanical Properties

Tensile:≥760 MPa;Yield:≥620 MPa;Elong:≥15%

Equivalent Standards

改型13Cr

Applications

超级13Cr，抗CO2/H2S油管。,Pipe

Available Forms

Austenitic stainless steel with excellent corrosion resistance, formability and weldability; non-magnetic in annealed condition. High nickel (≈5%) stabilises the austenite and improves toughness and pitting resistance. Molybdenum (≈2%) enhances resistance to chloride pitting and crevice corrosion — suited to marine and chemical service. Used in food processing, chemical plant, architecture, heat exchangers, kitchenware and medical devices.

Uses

Solution anneal 1010–1150 °C followed by rapid water quench to retain austenite; not hardenable by heat treatment. Sensitization avoided by low carbon or stabilizers (Ti/Nb).

Heat Treatment

Weld with low-carbon or stabilized filler (e.g., 316L, 347) to avoid sensitization; passivate after fabrication. Not hardenable, but work-hardens rapidly — use sharp tools and rigid setups. Avoid chloride contact for 304 in warm service; specify 316/317 for marine or aggressive media.

Precautions

API 5CT S13Cr-95 / S41426 / HP2-13Cr

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