M4簡介
USA ASTM Tool Steel And Hard Alloy M4，及該型號鋼材的基本信息、化學元素成分、機械性能、力學性能、熱處理溫度、同等型號參照表等。
基本信息：
| 分類 |
種類 |
型號 |
標準 |
國家 |
應用 |
|---|
| Steel Grades |
|
M4 |
ASTM |
USA |
Molybdenum series High-speed tool steel |
化學成分信息(mass fraction)(wt.%) of the M4：
| 元素名稱 |
含量比例值 |
|---|
| C |
1.25～1.40 |
| Si |
0.20～0.45 |
| Mn |
0.15～0.40 |
| P |
≤0.030 |
| S |
≤0.030 |
| Cr |
3.75～4.75 |
| Mo |
4.25～5.50 |
機械性能信息：
| 屈服強度Rp0.2（MPa） |
抗拉強度Rm（MPa） |
沖擊率 |
伸長率 |
斷面收縮率 |
熱處理狀態 |
布氏硬度（HBW） |
|---|
| 653 (≥) |
318 (≥) |
22 |
41 |
23 |
Solution and Aging, Annealing, Ausaging, Q+T,etc |
213 |
物理性質信息：
| 溫度 |
彈性模量 |
系數 |
熱導率 |
比熱容量 |
比電阻率 |
密度 |
加權系數 |
|---|
| 44 |
- |
- |
|
|
0.22 |
- |
|
| 666 |
211 |
- |
23.3 |
323 |
|
- |
|
| 655 |
- |
34 |
22.2 |
|
|
443 |
231 |
熱處理信息：
| 熱處理溫度區間 |
|---|
| Heat treated : 1524°C - 1527°C |
對照表（同等等級）信息：
| 型號 |
標準 |
國家 |
應用 |
|---|
| SM45 |
|
China |
Plastic mould with flat steel |
| SM50 |
|
China |
Plastic mould with flat steel |
| SM4Cr5MoSiV |
|
China |
Plastic mould with flat steel |
| SM4Cr5MoSiV1 |
|
China |
Plastic mould with flat steel |
| SM4Cr13 |
|
China |
Plastic mould with flat steel |
| SM45A |
|
China |
Plastic mould with Hot-rolled steel plate |
| SM48 |
|
China |
Plastic mould with Hot-rolled steel plate |
| M4 |
ASTM |
USA |
Molybdenum series High-speed tool steel |
| M41 |
ASTM |
USA |
Molybdenum series High-speed tool steel |
| M42 |
ASTM |
USA |
Molybdenum series High-speed tool steel |
| M43 |
ASTM |
USA |
Molybdenum series High-speed tool steel |
| M44 |
ASTM |
USA |
Molybdenum series High-speed tool steel |
| M46 |
ASTM |
USA |
Molybdenum series High-speed tool steel |
| M47 |
ASTM |
USA |
Molybdenum series High-speed tool steel |
| M48 |
ASTM |
USA |
Molybdenum series High-speed tool steel |
| CPM Rex M4 |
AISI |
USA |
Powder metallurgy high-speed tool steel |
| CPM Rex M4HS |
AISI |
USA |
Powder metallurgy high-speed tool steel |
| CPM Rex M42 |
AISI |
USA |
Powder metallurgy high-speed tool steel |
| M40 |
JIS |
Japan |
Carbide for cutting tools |
| BM4 |
|
UK |
Carbide for cutting tools |
