Cold Rolled 201 J1 J2 J3 J4 Stainless Steel Coil.Video
Apr 16, 2025
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Cold Rolled 201 J1 J2 J3 J4 Stainless Steel Coil.Video
1. What is 201 J1/J2/J3/J4 cold-rolled stainless steel coil?
201 J1/J2/J3/J4 belongs to the 200 series austenitic stainless steel, which is produced into coiled plates through the cold rolling process. It is characterized by high manganese and low nickel (Ni 3.5-5.5%), and the carbon content gradually decreases (J1≤0.15%→J4≤0.03%). It is suitable for scenes such as interior decoration, hardware products, and home appliance shells that do not require high corrosion resistance but require low-cost molding. Each model adjusts the content of Mn, Ni, and C to balance strength, toughness, and processing performance, and implements standards such as GB/T 3280 and JIS G4305.
1. Chemical Composition Comparison (GB/T 24511 Standard)
| Grade | C≤ | Ni | Mn | Cr | Core Characteristics |
|---|---|---|---|---|---|
| J1 | 0.15% | 3.5–5.5% | 12.0–16.0% | 16.0–18.0% | Standard type with higher nickel content, excellent formability, suitable for deep drawing (e.g., sinks, tableware). |
| J2 | 0.15% | 3.0–4.0% | 12.0–16.0% | 16.0–18.0% | Economical type with slightly lower nickel, higher strength, suitable for general bending and punching (e.g., doors, shelves). |
| J3 | 0.12% | 3.5–5.5% | 12.0–16.0% | 16.0–18.0% | Low-carbon design, improved weldability, reduced intergranular corrosion risk, suitable for thin-walled welded parts (e.g., lighting fixtures). |
| J4 | 0.03% | 3.5–5.5% | 12.0–16.0% | 16.0–18.0% | Ultra-low-carbon type with optimal corrosion resistance (close to 304L), suitable for mild corrosion environments (e.g., kitchens, bathrooms). |
2. Mechanical Properties and Processing Advantages
| Property | J1 | J2 | J3 | J4 | vs 304 Cold-rolled Coil |
|---|---|---|---|---|---|
| Tensile Strength (MPa) | ≥520 | ≥550 | ≥530 | ≥500 | 10% Lower (304≥515 MPa) |
| Elongation (%) | ≥40 | ≥35 | ≥45 | ≥48 | 5% Lower (304≥40%) |
| Hardness (HB) | ≤210 | ≤230 | ≤200 | ≤190 | 10% Higher (304≤187 HB) |
| Formability (Deep Drawing r-value) | 1.0 | 0.9 | 1.1 | 1.2 | 15% Lower (304 r≥1.3) |
