19Cr-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.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 12.00 | % | Measured | ||
Ultimate Tensile Strength(σUTS) | 192.1 | ksi | Measured | ||
Yield Strength (0.2% offset)(σy) | 147.4 | ksi | Measured |
Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data