冷拉异型钢的牌号及力学性能 ( 摘自 GB / T13791 — 1992 )
|
序 号 |
牌 号 |
冷拉状态 |
|
|
压痕直径 / mm |
布氏硬度 ( HBS ) |
||
|
1 |
10 |
≥ 4 . 3 |
≤ 197 |
|
2 |
15 |
≥ 4 . 2 |
≤ 207 |
|
3 |
20 |
≥ 4 . 1 |
≤ 217 |
|
4 |
25 |
≥ 4 . 0 |
≤ 229 |
|
5 |
30 |
≥ 3 . 9 |
≤ 241 |
|
6 |
35 |
≥ 3 . 9 |
≤ 241 |
|
7 |
40 |
≥ 3 . 9 |
≤ 241 |
|
8 |
45 |
≥ 3 . 8 |
≤ 255 |
|
9 |
50 |
≥ 3 . 7 |
≤ 269 |
|
10 |
60 |
≥ 3 . 6 |
≤ 285 |
|
11 |
50Mn |
≥ 3 . 7 |
≤ 269 |
|
12 |
40MnB |
≥ 3 . 7 |
≤ 269 |
|
13 |
50B |
≥ 3 . 7 |
≤ 269 |
|
14 |
20Cr |
≥ 4 . 0 |
≤ 229 |
|
15 |
40Cr |
≥ 3 . 7 |
≤ 269 |
|
16 |
20CrMo ( A ) |
≥ 3 . 9 |
≤ 241 |
|
17 |
35CrMo ( A ) |
≥ 3 . 7 |
≤ 269 |
|
18 |
30CrMnSi ( A ) |
≥ 3 . 7 |
≤ 269 |
|
19 |
12CrNi3A |
≥ 3 . 7 |
≤ 269 |
