等级 |
C |
Mn |
Si |
P |
S |
V |
Nb |
Ti |
Al |
Cr |
Ni |
A |
≦0.20 |
1.00~1.70 |
≦0.55 |
≦0.045 |
≦0.045 |
0.02~0.20 |
0.015~0.060 |
0.02~0.20 |
- |
≦0.40 |
≦0.70 |
B |
≦0.20 |
1.00~1.70 |
≦0.55 |
≦0.040 |
≦0.040 |
0.02~0.20 |
0.015~0.060 |
0.02~0.20 |
- |
≦0.40 |
≦0.70 |
C |
≦0.20 |
1.00~1.70 |
≦0.55 |
≦0.035 |
≦0.035 |
0.02~0.20 |
0.015~0.060 |
0.02~0.20 |
≧0.015 |
≦0.40 |
≦0.70 |
D |
≦0.20 |
1.00~1.70 |
≦0.55 |
≦0.030 |
≦0.030 |
0.02~0.20 |
0.015~0.060 |
0.02~0.20 |
≧0.015 |
≦0.40 |
≦0.70 |
E |
≦0.20 |
1.00~1.70 |
≦0.55 |
≦0.025 |
≦0.025 |
0.02~0.20 |
0.015~0.060 |
0.02~0.20 |
≧0.015 |
≦0.40 |
≦0.70 |
力学性能: |
【抗拉强度】(σb/MPa)
520~680
【伸长率】(δ5/%)
等级 |
δ5/% |
A |
≧18 |
B |
≧18 |
C |
≧19 |
D |
≧19 |
E |
≧19 | 【屈服点】(σs/MPa)
厚度(直径、边长)/mm |
≦16 |
>16~35 |
>35~50 |
>50~100 |
σs/MPa |
≧420 |
≧400 |
≧380 |
≧360 | 【冲击吸收功】(Akv(纵向)/J)
等级¦温度 |
+20℃ |
0℃ |
-20℃ |
-40℃ |
A |
|
|
|
|
B |
≧34 |
|
|
|
C |
|
≧34 |
|
|
D |
|
|
≧34 |
|
E |
|
|
|
≧27 | 【主要特性】
| |