Manufacturing Notes:
Steel Plate under ASTM A537 Class 1, 2 and 3 shall be killed steel and comply with fine austenitic grain size requirement of Specification A20/A20M.
Heat Treatment Methods
All plates under ASTM A537 shall be heat treated as follows:
ASTM A537 Class 1 plates shall be normalized.
Class 2 and Class 3 plates shall be quenched and tempered. The tempering temperature for Class 2 plates shall not be less than 1100°F [595°C] and not less than 1150°F [620°C] for Class 3 plates.
A: Applies to both heat and product analysis.
B: Manganese may exceed 1.35% on heat analysis, up to a maximum of 1.60%, and nickel may exceed 0.25% on heat analysis, up to a maximum of 0.50%, provided the heat analysis carbon equivalent dose not exceed 0.57^ when based upon the following equation:
CE = C + Mn/5 + (Cr+Mo+V)/5 + (Ni+Cu)/15
When this option is exercised, the manganese and nickel contents on product analysis shall not exceed the heat analysis content by more than 0.12% and 0.03%, respectively.
Mechanical Requirements for A537 CL1, CL2, CL3
Tensile strength and yield strenght: The material as represented by the tension-test specimens shall conform to the requirements shown in Table 2.
For Class 2 and Class 3 plates with a nominal thickness of 3/4 in. [20 mm] and under, the 1 1/2-in. [40 mm] wide rectangular specimen may be used for the tension test, and the elongation may be determined in a 2-in. [50 mm] gage length that includes the fracture and that shows the greatest elongation.
Our Strength
Group has 8 subsidiary corporations, located in Anyang, Tianjin, Hongkong and Singapore countries and districts.
Leaning on Angang, border to HBIS in north, neighbor to Wuyang steel in south, next to Shandong steel and Rizhao steel in east, Gnee has abundant and diverse supply sources. Our main products: steel plate series including shipbuilding plate, pressure vessel plate, bridge Corten steel, mining wear resistant plate, high strength structural plate, stainless steel plate, cold rolled steel plate, galvanized steel plate etc.; Pipe series contain: seamless pipe, welded pipe, API pipe, square pipe etc.; Bar series cover: carbon round bar, alloy round bar, stainless steel round bar etc.; Profile ranges from H beam, angle, channel beam, flat bar to I beam etc.; Further steel processing involves: project design and manufacture, garden design and Corten steel material processing-production.
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