18Cr-4Ni Duplex Stainless

metal

18Cr-4Ni is a lean duplex stainless steel combining ferritic and austenitic phases to deliver a balanced mix of strength, corrosion resistance, and cost efficiency compared to conventional austenitic stainless steels. It is widely used in chemical processing, desalination plants, pulp and paper production, and offshore equipment where moderate corrosion resistance and good mechanical properties are required without the expense of higher-alloyed duplex grades. Engineers select this grade when weight savings, fabricability, and resistance to chloride stress-corrosion cracking are priorities, and where the lower nickel content offers cost advantages over 304/316L austenitic stainless steels in non-severe corrosive environments.

Chemical processing equipmentDesalination and water treatmentPulp and paper industryOffshore piping and fastenersCost-effective corrosion-resistant structuresHeat exchanger tubes

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.