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Chemical composition:
|
Trademark |
Chemical composition |
|||||||
|
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Cu |
|
|
≤ |
||||||||
|
15Mn |
0.12~0.18 |
0.17~0.37 |
0.70~1.00 |
0.035 |
0.035 |
0.30 |
0.25 |
0.25 |
|
20Mn |
0.17~0.23 |
0.17~0.37 |
0.70~1.00 |
0.035 |
0.035 |
0.30 |
0.25 |
0.25 |
Mechanical Properties:
|
Trademark |
Blank sample |
Heat Treatment |
Mechanical Properties |
Hardness of steel delivery status/HBS |
|||||||
|
Normalizing |
Quench |
Tempering |
σb/MPa |
σs/MPa |
δ5(%) |
ψ(%) |
Ak/J |
≤ |
|||
|
≥ |
No heat |
Annealed steel |
|||||||||
|
15Mn |
25 |
920 |
|
|
410 |
245 |
26 |
55 |
|
163 |
|
|
20Mn |
25 |
910 |
|
|
450 |
175 |
24 |
50 |
|
197 |
|
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