C | Si | Mn | Cr | Ni | Mo | V | P | S |
0.40~0.53 | 0.60~0.90 | 0.4~0.6 | 1.54~2.00 | 0.80~1.20 | 0.80~1.20 | 0.30~0.50 | ≤0.030 | ≤0.030 |
臨界點 | Ac1 | Ac3 | Ar3 | Ar1 | Ms |
溫度(近似值)/℃ | 750 | 874 | 751 | 623 | 243 |
加熱溫度/℃ | 開始溫度/℃ | 終止溫度/℃ | 冷卻 |
1180~1200 | 1140~1160 | 850~900 | 緩冷(坑冷或砂冷) |