Stainless steel coils are divided into austenite, ferrite, martensite, dual-phase (ferrite-austenite) stainless steel cold-rolled coils and stainless steel hot-rolled coils.

Executive standards: GB/T4238, ASTM/ASME, JIS G4305, EN10088, BSEN10028, GB/T3280, GB/T4237

Specifications: stainless steel hot rolled coil: thickness 1.5-15 width 1000 or 1219 or 1500 or 1800 or 2000 (including burrs)

Stainless steel cold rolled coil: thickness 0.3-3.0 width 1000 or 1219 or 1500 (including burrs)

Stainless steel cold-rolled coil: thickness 0.1-3.0 width 500 or 1600 (including burrs)

Stainless steel coils are widely used in chemical, food, medicine, paper, petroleum, atomic energy and other industries, as well as various parts and components of construction, kitchen utensils,

tableware, vehicles, and household appliances

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).

Specification

Composition of Stainless Steel

Steel is an alloy of iron and carbon. Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon and other alloying elements. Stainless steel’s corrosion resistance and

mechanical properties can be further enhanced by adding other elements, such as nickel, molybdenum, titanium, niobium, manganese, etc.