18Cr-4Ni Duplex Stainless (var. 4)
metal18Cr-4Ni duplex stainless steel is a two-phase ferritic-austenitic stainless steel combining moderate chromium content with balanced nickel levels to achieve good corrosion resistance and workability. This variant is used in moderate-corrosion environments where both strength and ductility matter, such as structural fasteners, process equipment, and general industrial piping; it offers better toughness than ferritic grades while remaining more cost-effective than higher-alloyed duplex or super-duplex stainless steels, making it a practical choice when 300-series austenitic grades would be over-specified.
industrial fasteners and boltschemical process equipmentwater treatment systemsgeneral structural applicationsfood processing equipmentoff-shore mild corrosion environments
Compliance & Regulations
?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | — | - | — | — | |
Ultimate Tensile Strength(σUTS) | — | ksi | — | — | |
Yield Strength (0.2% offset)(σy) | — | ksi | — | — |
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.