Certificates

WYJ041-2001                       30Mn2

1. The technology conditions apply to 30 Mn2 structure steel plates for fujian sea source.

2. The size, shape, weight and allow deviation

2.1 the roughness steel plate should be no more than 5 mm/m.

2.2 plate thickness tolerance: + 3 mm/  -0 mm

2.3 steel plate size and shape the rest, weight and deviation should be allowed to meet the provisions of the GB709-88 standard.

3. Technical requirements

3.1 the chemical composition of steel (melting analysis) should comply with the relevant provisions of the table 1.

Chart 1

 

C	Si	Mn	P	S
0.27～0.34	0.17～0.37	1.40～1.80	≤0.035	≤0.035

3.2 delivery status:normalized

3.3 mechanical properties: σb quartile 520 MPa, and provide σs, the delta 5 and normal temperature impact energy of the measured value.