SA612M pressure vessel steel plate
SA612M is a low welding pressure vessels calm the C-Mn-Si steel sheet
Its main conditions are as follows
1 Scope This technical agreement applies to the maximum thickness of 25mm in the low-temperature welding pressure vessel production of the sedative C-Mn-Si steel sheet and
Test.
2 Normative references (omitted)
The size, shape, appearance and allow deviation steel plate size, shape, appearance and tolerances for the implementation of the requirements of SA 20M.
4 technical requirements
Nb in the melting analysis of the content can be increased to not more than 0.05%, the content of the product analysis can be increased to not more than 0.06%.
Delivery status: normalizing
4.1 Mechanical Properties
Performance of project performance (12.5mm) (12.5mm to 25mm)
Tensile strength (MPa) 570 725 560 695
Yield strength (MPa) ≥ 345 ≥ 345
Elongation (gauge 200mm) ≥ 16 ≥ 16
Elongation (gauge length 50 mm) ≥ 22 ≥ 22
-40 ℃ V lateral impact energy, J the average of ≥ 20 ≥ 27 single value
4.2 plate batch inspection of grain size, austenite grain size should be ≥ 5.
Steel plate surface defects, edge defects, repair welding quality requirements such as SA-20M (2005 additions) "pressure
Power vessel steel plate universal requirements 9.
Ultrasonic testing: the steel plate of the testing standards and conformity level specified in the contract.
7 implementation of the identification of steel SA 20M standard requirements, which should be steel plant name or factory standard furnace number and slab number and materials
Standards that the standard number, grade of materials, class number and model, the distance from the edge of each steel plate not less than 300mm of the two, marked a clear
The stamp.
Quality certification file steel quality documents should be consistent with the relevant provisions of the SA 20M standard, and provided quality certification
Document should be of aluminum, niobium, and titanium content.
9 Matters not covered in the SA 20M standard requirements.
|
