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1. The applicable scope
The technology conditions apply to 205 mm thickness and 210 mm thick ASTM A588CrB-T especially thick steel plates.
2. Of the steel plate size and shape, weight and deviation should be allowed to meet ASTM A6 / A6M of the provisions of the standard.
3. Technical conditions
3.1 chemical composition (melting analysis) shall conform to the provisions of the table 1.
Chart 1 Wt％
|
C |
Si |
Mn |
P |
S |
Cu |
Ni |
Cr |
V |
|
≤0.20 |
0.15～0.50 |
0.75～1.35 |
≤0.035 |
≤0.035 |
0.20～0.40 |
≤0.50 |
0.40～0.70 |
0.01～0.10 |
3.2 delivery status:normalized
3.3 mechanical properties shall conform to the provisions of the table 2.
Chart 2
|
σsu MPa |
σb MPa |
δ5 % |
bend180° |
room temperature AKV(Longitudinal )J |
|
≥260 |
≥485 |
≥19 |
d=3a |
≥27 |
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