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1, applicable scope
The technology conditions apply to no more than 100 mm thickness of A709M-HPS 485 W high strength steel bridge g syndrome of resistance.
2, size, shape, weight and allow deviation
The steel plate size and shape, weight and deviation should be allowed to meet ASTM A6 / A6M rules.
3, chemical composition (melting analysis)
The chemical composition of steel (melting analysis) should be in accordance with table 1.
Table 1 wt%
|
Steel grade |
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Mo |
V |
Cu |
Al |
N |
|
A709M-HPS 485W |
≤ 0.11 |
0.30 0.50 |
1.10 1.35 |
≤ 0.020 |
≤ 0.006 |
0.25 0.40 |
0.45 0.70 |
0.02 0.08 |
0.04 0.08 |
0.25 0.40 |
0.010 0.040 |
≤ 0.015 |
4、mechanical property
The mechanical properties of the steel plate test results should comply with the provisions of thetable 2table 2 mechanical property
|
specification （mm） |
Rp0.2
（MPa） |
Rm （MPa） |
A （landscape ，50mm，%） |
Akv （-23℃，lengthways ，J） |
ψz （％） |
|
8-100 |
≥485 |
585-760 |
≥17 |
≥34（average） |
≥25（average） |
Note: according to need additional Z to performance requirements, Z to performance should comply with the GB5313-85 Z25 regulation, specific specifications and number in indicated in the contract.
5, manufacturing process and delivery status
5.1 steel should be calm steel, in line with the A6 / A6M austenitic grain size requirement;
5.2 the liquid steel must be vacuum processing;
5.3 steel plate to the tempering state delivery.
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