冷镦钢线材，主要用于汽车紧固件。
SWRCH8A SWRCH10A SWRCH18A SWRCH22A
冷镦钢盘条（Q/BQB 517）Cold Heading Wire Rod
| Grade | C | Si | Mn | P | S | Al |
SWRCH8A | ≤0.1 | ≤0.1 | ≤0.6 | ≤0.02 | ≤0.020 | ≥0.02 |
SWRCH10A | 0.08-0.13 | ≤0.1 | 0.3-0.6 | ≤0.02 | ≤0.020 | ≥0.02 |
SWRCH12A | 0.08-0.15 | ≤0.1 | 0.3-0.6 | ≤0.02 | ≤0.020 | ≥0.02 |
SWRCH18A | 0.15-0.2 | ≤0.1 | 0.6-0.9 | ≤0.02 | ≤0.020 | ≥0.02 |
SWRCH20A | 0.18-0.23 | ≤0.1 | 0.3-0.6 | ≤0.02 | ≤0.020 | ≥0.02 |
SWRCH22A | 0.18-0.23 | ≤0.1 | 0.7-1.0 | ≤0.02 | ≤0.020 | ≥0.02 |
| Grade | ISO | US | EURO |
SWRCH8A | C8C | 1008 | 1.0213 |
SWRCH10A | C10C | 1010 | 1.0214 |
SWRCH12A | C12C | 1012 | - |
SWRCH18A | C17C | 1018 | 1.0434 |
SWRCH20A | C20C | 1020 | 1.0411 |
SWRCH22A | C20C | 1022 | 1.1147 |
