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1,Applicable scope
The technology conditions apply to more than 100 mm thickness of 25 CrMo steel plates.
2, size, shape, weight and deviation should be allowed to meet the provisions of the GB709-88.
3, technical requirements
3.1 the chemicalcomposition of steel (melting analysis)
|
C |
Si |
Mn |
Cr |
Mo |
P |
S |
Cu |
Ni |
|
0.22 ～ 0.29 |
0.15 ～ 0.40 |
0.50 ～ 0.80 |
0.9 ～ 1.20 |
0.15 ～ 0.30 |
≤0.035 |
≤0.035 |
≤ 0.30 |
≤ 0.30 |
3.2 delivery status: the annealing or high temperature normalized.
3.3 machinery and process performance
3.3.1 hardness of steel plate after annealing or high temperature tempering ≤212 HB.
3.3.2 Provide mechanical properties after conditioning (σb, σs, the delta 5, ψnormal temperature AKV)
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