25简介
China GBT Structure Steel 25，及该型号钢材的基本信息、化学元素成分、机械性能、力学性能、热处理温度、同等型号参照表等。
基本信息：
| 分类 |
种类 |
型号 |
标准 |
国家 |
应用 |
|---|
| Steel Grades |
|
25 |
GBT |
China |
China structural steel and alloy steel |
化学成分信息(mass fraction)(wt.%) of the 25：
| 元素名称 |
含量比例值 |
|---|
| C |
0.22-0.29 |
| Si |
0.17-0.37 |
| Mn |
0.50-0.80 |
| P |
0.035 |
| S |
0.035 |
| Cr |
0.25 |
| Ni |
0.3 |
机械性能信息：
| 屈服强度Rp0.2（MPa） |
抗拉强度Rm（MPa） |
冲击率 |
伸长率 |
断面收缩率 |
热处理状态 |
布氏硬度（HBW） |
|---|
| 248 (≥) |
961 (≥) |
34 |
21 |
43 |
Solution and Aging, Annealing, Ausaging, Q+T,etc |
122 |
物理性质信息：
| 温度 |
弹性模量 |
系数 |
热导率 |
比热容量 |
比电阻率 |
密度 |
加权系数 |
|---|
| 41 |
- |
- |
|
|
0.34 |
- |
|
| 698 |
826 |
- |
14.3 |
144 |
|
- |
|
| 418 |
- |
22 |
23.2 |
|
|
233 |
241 |
热处理信息：
| 热处理温度区间 |
|---|
| Heat treated : 1289°C - 1215°C |
对照表（同等等级）信息：
| 型号 |
标准 |
国家 |
应用 |
|---|
| Q255 A |
|
China |
Engineering and welding |
| Q255 B |
|
China |
Engineering and welding |
| H25 |
ASTM |
USA |
Alloy tool steel |
| T20825 |
UNS |
USA |
Alloy tool steel |
| CPM Rex 25 |
AISI |
USA |
Powder metallurgy high-speed tool steel |
| Stellite 25 |
|
|
Stellite alloy |
| Stellite 250 |
|
|
Stellite alloy |
| Stellite 251 |
|
|
Stellite alloy |
| 1.1525 |
|
|
|
| C125W |
|
|
|
| 1.1625 |
|
|
|
| 125Cr1 |
DIN |
Germany |
Cold working alloy tool steel |
| 125Cr2 |
DIN |
Germany |
Cold working alloy tool steel |
| 125CrSi5 |
DIN |
Germany |
Cold working alloy tool steel |
| 1.2510 |
DIN |
Germany |
Cold working alloy tool steel |
| 1.2516 |
DIN |
Germany |
Cold working alloy tool steel |
| 1.2519 |
DIN |
Germany |
Cold working alloy tool steel |
| 1.2542 |
DIN |
Germany |
Cold working alloy tool steel |
| 1.2550 |
DIN |
Germany |
Cold working alloy tool steel |
| 1.2552 |
DIN |
Germany |
Cold working alloy tool steel |
