A) Material Classification:
200 series: 201, 202 …
300 series: 301,302,304,304L,304H,309S,310S,316,316L,321,347…
400 series: 410,420,430,431,434…
B) Hardness Classification:
Soft | 1/4H | 1/2H | 3/4H | H | EH |SH
C) Surface Classification:
Bright; Gray; Oxidation; Burnishing; Coppering; Lead plating and so on
D) Purpose Classification:
For spring; cold upsetting; welding; wire rope
E )Physical Classification:
Magnetic / Nonmagnetic
F) Shape classification:
Round wire; Half round wire; Square wire; pressure flat wire; precision shaped wire
| Grade | C | Si | Mn | Cr | N | P | S | Ni | Cu | Ti | Mo |
| 201 | ≤0.15 | ≤0.75 | 5.5~7.50 | 16.0~18.0 | ≤0.25 | ≤0.06 | ≤0.03 | 3.5~5.5 | 0.80% |
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| 202 | ≤0.15 | ≤1.0 | 7.50~10.0 | 17.0~19.0 | ≤0.25 | ≤0.06 | ≤0.03 | 4.0~6.0 | – |
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| 301 | ≤0.15 | ≤1.0 | ≤2.0 | 16.0~18.0 | – | ≤0.045 | ≤0.03 | 6.0~8.0 | – |
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| 302 | ≤0.15 | ≤1.0 | ≤2.0 | 17.0~19.0 | – | ≤0.035 | ≤0.03 | 8.0~10.0 | – |
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| 302HQ | ≤0.15 | ≤1.0 | ≤2.0 | 8.0~10.0 | – | ≤0.045 | ≤0.03 | 8.0~10.0 | 3~4 |
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| 304 | ≤0.08 | ≤1.0 | ≤2.0 | 18.0~20.0 | – | ≤0.045 | ≤0.03 | 8.0~11.0 | – |
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| 304L | ≤0.03 | ≤1.0 | ≤2.0 | 18.0~20.0 | – | ≤0.045 | ≤0.03 | 8.0~11.0 | – |
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| 304H | 0.04~0.1 | ≤1.0 | ≤2.0 | 18.0~20.0 | – | ≤0.045 | ≤0.03 | 8.0~11.0 | – |
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| 304N | ≤0.08 | ≤0.75 | ≤2.0 | 18.0~20.0 | 0.1~0.16 | ≤0.045 | ≤0.03 | 8.0~11.0 | – |
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| 316 | ≤0.08 | ≤1.0 | ≤2.0 | 16~18.0 | – | ≤0.035 | ≤0.03 | 10.0~14.0 | – |
| 2.0~3.0 |
| 316L | ≤0.03 | ≤1.0 | ≤2.0 | 16.0~18.0 | – | ≤0.045 | ≤0.03 | 10.0~14.0 | – |
| 2.0~3.0 |
| 321 | ≤0.08 | ≤1.0 | ≤2.0 | 17.0~19.0 | – | ≤0.045 | ≤0.03 | 9.0~12.0 | – | ≤0.7 |
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| 410 | ≤0.15 | ≤1.0 | ≤1 | 11.5~13.5 | – | ≤0.040 | ≤0.03 | – | – |
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| 420 | 0.3~0.4 | ≤1.0 | ≤1 | 12.0~14.0 | – | ≤0.040 | ≤0.03 | ≤0.75 | – |
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| 430 | ≤0.12 | ≤0.75 | ≤1 | 16.0~18.0 | – | ≤0.040 | ≤0.03 | ≤0.60 | – |
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