Certificates

WYJ027-2001                   30CrMnSiA

1. This technical agreement with reference to GJB2150-94 standard, mechanical performance requirements for two kinds of steel plate, apply to more than 100 mm thickness of 30 CrMnSiA steel plates.

2. The size, shape, weight and allow deviation

2.1 the size of the steel plate, shape, weight and deviation should be allowed to meet the provisions of the GB709.

2.2 steel plate roughness not more than GB709 function of the provisions of the eight 1.5 times.

3. Technical requirements

3.1 chemical composition

3.1.1 The chemical composition of the steel plate (melting analysis) shall conform to the provisions of the table 1

Chart 1                               WT％

 

C	Si	Mn	P	S	Cr	Ni	Cu
0.28～0.34	0.90～1.20	0.80～1.10	≤0.025	≤0.025	0.80～1.10	≤0.30	≤0.25

3.1.2 Residual elements Mo should be analysis, the content should be write into the quality certificate, but element W do not participate in analysis.

The chemical composition of the finished product 3.1.3 pruning steel deviation should be allowed to meet GB222 table 2 regulations.

3.2 delivery status: normalized

3.4 mechanical properties

3.4.1 track of the mechanical properties of the steel plate should comply with the regulations of the table 2

Chart 2

 

tensile strength  σb  MPa	elongation δ，％
540～880	≥19

3.4.2 More than 18 mm of thickness steel plate, elongation at break allows a table 2 provisions reduce 1% (absolute value).