Parameter

Stainless Steel Round bar 430 431 420F 430F Stainless steel SS Round Bar 430 Stainless steel (ferritic stainless steel)

Composition: 16-18% Cr, low carbon (≤0.12% C), nickel free.

Features

Corrosion resistance: medium, suitable for mild environments (such as atmosphere, fresh water), but less than austenitic stainless steel (such as 304).

Magnetic: Has magnetic properties.

Workability: Formability is general, poor welding performance (easy embrittlement).

Heat treatment: cannot be strengthened by heat treatment.

Typical applications

Decorative parts (such as car trim), home appliance parts, tableware, architectural decoration.

Selection suggestion: Suitable for scenarios with limited budget, medium corrosion resistance and no need for high strength.

431 stainless steel (Martensitic stainless)

Composition: 15-17% Cr, 1.25-2.5% Ni, 0.12-0.22% C.

Features

Strength and hardness: High strength and hardness (HRC 35-45) can be obtained by quenching + tempering.

Corrosion resistance: Better than 420 series, but weaker than austenitic stainless steel.

Magnetic: Has magnetic properties.

Workability: After heat treatment, poor weldability.

Typical applications

High stress parts (such as shafts, pump parts), aviation fasteners, surgical instruments.

Selection suggestion: Suitable for engineering parts requiring high strength, wear resistance and certain corrosion resistance.