19Cr-4Ni Duplex Stainless
metal19Cr-4Ni duplex stainless steel is a lean duplex stainless alloy combining chromium and molybdenum for corrosion resistance with a dual-phase microstructure (austenite + ferrite) that enhances strength and toughness. It is widely used in oil and gas pipelines, desalination plants, chemical processing equipment, and marine structures where resistance to pitting and stress-corrosion cracking is critical and cost must be controlled relative to super-duplex grades. Engineers choose this alloy when corrosion resistance and strength must be balanced against material cost and machinability, offering a middle ground between austenitic stainless steels and more expensive duplex variants.
oil and gas pipelinesdesalination and water treatmentchemical processing vesselsmarine heat exchangerspressure equipmentcorrosion-resistant fasteners
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.