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1.applicable scope
The technology conditions apply to the SA387Gr11c12 steel plate with gasifier hydrogen production and inspection.
2. The reference standard (slightly)
3. The size, shape, weight and deviation should be allowed to meet the standard of the provisions of the GB6654 only.
4. Mechanical properties
|
Rm（MPa） |
Rp0.2（MPa） |
A （％） |
Z （％） |
Cold bend test |
Thickness tensileZ(%) |
hardness（HB） |
High temperature tensile |
|
515 ～620 |
310～517 |
≥22 |
≥45 |
180。 A |
≥35 |
≤225 |
B |
|
10℃charpy impact test energy C J |
-10℃harpy impact test energy C J |
|
≥55（average value） ≥48（single value） |
≥55（average value） ≥48（single value） |
A：The apex diameter of steel test rules as follows
Steel plate thickness T（mm） Apex diameterd（mm）
25≤T＜100 d＝2.0T
T≥100 d＝3.0T
B：425℃Rp0.2≥224.4MPa；provide 450℃Rp0.2
C: impact test, shall be recorded lateral expansion value and fibrous fracture shape percentage.
4.1 the steel should have level 5 or more fine grain degrees.
4.2 ultrasonic inspection: the steel plate driven by zhang JB4730-94 standard for ultrasonic inspection check, inspection qualified for the level I level.
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