Grade：210S, 314, 309S, 304, 304L, 316L,321,410,420,430,904etc.

Specifications 
Thickness：0.1mm - 150mm
Width：500mm - 6000mm
Length：500mm - 3000mm
Surface Polishing, Brushed, Annealed, etc.
Standard AISI, ASTM, EN, BS, GB, DIN, JIS etc.
MOQ 1 ton

1. Chemical Composition

The main alloying element of stainless steel is chromium (Cr) (typically ≥10.5%), supplemented by other elements (e.g., nickel, molybdenum, manganese) to achieve different properties. Below are typical classifications and composition examples:

1. Austenitic Stainless Steel (e.g., 304, 316)

Cr: 16–20%
Ni: 8–12% (enhances corrosion resistance and formability)
C: ≤0.08% (low-carbon types like 304L contain C ≤0.03%)
Mo: 2–3% (e.g., 316 contains Mo for improved pitting resistance)
Mn, Si: Trace amounts (improves processability).

2. Ferritic Stainless Steel (e.g., 430, 444)

Cr: 16–18% (e.g., 430)
C: ≤0.12% (low carbon)
Ni: Generally absent (cost-effective)
Mo: Some grades contain it (e.g., 444 contains 1.75–2.5% Mo).

3. Martensitic Stainless Steel (e.g., 410, 420)

Cr: 11.5–18%
C: 0.15–1.2% (high carbon for increased hardness)
Ni: Trace or none.

4. Duplex Stainless Steel (e.g., 2205)

Cr: 21–23%
Ni: 4.5–6.5%
Mo: 2.5–3.5%
N: 0.1–0.3% (improves strength and corrosion resistance).

2. Mechanical Properties

Mechanical properties depend on processing conditions (annealed, cold-rolled, etc.) and heat treatment. Common ranges are as follows:

1. Austenitic Stainless Steel (Annealed Condition)

Tensile Strength (Rm): 500–700 MPa
Yield Strength (Rp0.2): 200–300 MPa
Elongation (A): 40–60%
Hardness: 150–200 HV (Brinell Hardness).

2. Ferritic Stainless Steel (Annealed Condition)

Tensile Strength: 450–600 MPa
Yield Strength: 250–400 MPa
Elongation: 20–30%
Hardness: 160–220 HV.

3. Martensitic Stainless Steel (Quenched + Tempered)

Tensile Strength: 700–2000 MPa (increases with carbon content)
Yield Strength: 550–1800 MPa
Elongation: 5–15%
Hardness: 35–60 HRC.

 Surface Selection