鉻是耐熱鋼的主要合金元素之一。鉻鋼是指含鉻的合金鋼﹐質地堅硬﹐耐磨﹐耐腐蝕﹐不生銹﹐可用來製造機器和工具。具有較高的抗氧化性和耐蝕性。為了不同的使用環境,常加入其他元素如鉬、釩、鎢、鈦、鈮、硼等元素。 在碳鋼中添加鉻元素約1%以得到較高的硬化能、高回火抵抗性及強韌的組織。具有優良的抗氧化性、耐蝕性及耐磨性等。
合金具有抗高溫氧化和抗熔蝕性。這種合金已用作製造燃氣輪機的火焰穩定器、乙烯分餾爐中的熱電偶套管等部件。
| 標準代號 | 規格號碼 | 材料號碼 | 記號 |
|---|---|---|---|
| CNS | 3231 | SCr415 | |
| GB | 3077 | 15Cr3 | |
| JIS | G4104 | SCr415 | |
| DIN | 17210 | 1.7015 | 15Cr3 |
| CNS | 3231 | SCr420 | |
| GB | 3077 | 20Cr | |
| JIS | G4104 | SCr420 | |
| AISI | 5120 | ||
| CNS | 3231 | SCr430 | |
| GB | 3077 | 30Cr | |
| JIS | G4104 | SCr430 | |
| AISI | 5130 | ||
| AISI | 5132 | ||
| DIN | 17200 | 1.7033 | 34Cr4 |
| CNS | 3231 | SCr435 | |
| GB | 3077 | 35Cr | |
| JIS | G4104 | SCr435 | |
| AISI | 5135 | ||
| DIN | 17200 | 1.7034 | 37Cr4 |
| CNS | 3231 | SCr440 | |
| GB | 3077 | 40Cr | |
| JIS | G4104 | SCr440 | |
| AISI | 5140 | ||
| DIN | 17200 | 1.7035 | 41Cr4 |
| DIN | 17210 | 1.7035 | 41CrS4 |
| CNS | 3231 | SCr445 | |
| GB | 3077 | 45Cr | |
| JIS | G4104 | SCr445 | |
| AISI | 5147 |
| 碳(C)% | 矽(Si)% | 錳(Mn)% | 磷(P)% | 硫(S)% | 鎳(Ni)% | 鉻(Cr)% | 銅(Cu)% | 硒(Se)% |
|---|---|---|---|---|---|---|---|---|
| 0.13~0.18 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.3 | |
| 0.12~0.18 | 0.17~0.37 | 0.4~0.7 | ≦ 0.035 | ≦ 0.035 | 0.7~1 | |||
| 0.13~0.18 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.3 | |
| 0.12~0.18 | 0.15~0.4 | 0.4~0.6 | ≦ 0.035 | ≦ 0.035 | 0.4~0.7 | |||
| 0.18~0.23 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.3 | |
| 0.18~0.24 | 0.17~0.37 | 0.4~0.7 | ≦ 0.035 | ≦ 0.035 | 0.7~1 | |||
| 0.18~0.23 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.3 | |
| 0.17~0.22 | 0.15~0.3 | 0.7~0.9 | ≦ 0.035 | ≦ 0.04 | 0.7~0.9 | |||
| 0.28~0.33 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.3 | |
| 0.27~0.34 | 0.17~0.37 | 0.5~0.8 | ≦ 0.035 | ≦ 0.035 | 0.8~1.1 | |||
| 0.28~0.33 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.3 | |
| 0.28~0.33 | 0.15~0.3 | 0.7~0.9 | ≦ 0.035 | ≦ 0.04 | 0.8~1.1 | |||
| 0.3~0.35 | 0.15~0.3 | 0.6~0.8 | ≦ 0.035 | ≦ 0.04 | 0.75~1 | |||
| 0.3~0.37 | 0.15~0.4 | 0.6~0.9 | ≦ 0.035 | ≦ 0.035 | 0.9~1.2 | |||
| 0.33~0.38 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.35 | |
| 0.32~0.39 | 0.17~0.37 | 0.5~0.8 | ≦ 0.035 | ≦ 0.035 | 0.89~1.1 | |||
| 0.33~0.38 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.35 | |
| 0.33~0.38 | 0.15~0.3 | 0.6~0.8 | ≦ 0.035 | ≦ 0.04 | 0.8~1.05 | |||
| 0.34~0.41 | 0.15~0.4 | 0.6~0.9 | ≦ 0.035 | ≦ 0.035 | 0.9~1.2 | |||
| 0.38~0.43 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.04 | ≦ 0.25 | 0.9~1.2 | ≦ 0.3 | |
| 0.37~0.44 | 0.17~0.37 | 0.5~0.8 | ≦ 0.035 | ≦ 0.035 | 0.8~1.1 | |||
| 0.38~0.43 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.04 | ≦ 0.25 | 0.9~1.2 | ≦ 0.3 | ≦ 0 |
| 0.38~0.43 | 0.15~0.3 | 0.7~0.9 | ≦ 0.035 | ≦ 0.04 | 0.7~0.9 | |||
| 0.37~0.45 | 0.15~0.4 | 0.5~0.8 | ≦ 0.035 | ≦ 0.035 | 0.9~1.2 | |||
| 0.38~0.45 | 0.15~0.4 | 0.5~0.8 | ≦ 0.035 | ≦ 0.035 | 0.9~1.2 | |||
| 0.43~0.48 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.25 | |
| 0.42~0.49 | 0.17~0.37 | 0.5~0.8 | ≦ 0.035 | ≦ 0.035 | 0.8~1.1 | |||
| 0.43~0.48 | 0.15~0.35 | 0.6~0.85 | ≦ 0.03 | ≦ 0.03 | ≦ 0.25 | 0.9~1.2 | ≦ 0.25 | |
| 0.46~0.51 | 0.15~0.35 | 0.7~0.95 | ≦ 0.035 | ≦ 0.04 | 0.85~1.15 |