16Cr-4Ni Duplex Stainless (var. 3)

metal

16Cr-4Ni duplex stainless steel is a ferritic-austenitic two-phase stainless steel combining moderate chromium content with nickel and significant silicon and cobalt alloying; the cobalt addition (5.5%) is unusual for conventional duplex grades and suggests enhanced hardness or specialized strengthening. This material variant bridges standard duplex stainless properties with modified phase balance, making it suitable for applications requiring improved wear resistance or elevated-temperature strength where traditional duplex alloys fall short. The dual-phase microstructure provides corrosion resistance typical of stainless steels while maintaining ferromagnetic character and higher strength than austenitic-only grades.

pump impellers and casingsheat exchanger tubesoil and gas downhole equipmentwear-resistant industrial fastenershigh-strength corrosion-resistant shafts

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Elongation at Break(εf)
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-——
Ultimate Tensile Strength(σUTS)
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Pa——
Yield Strength (0.2% offset)(σy)
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Pa——
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Quality & Standards

Industry-Specific

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.