Certificates

WYJ015-2005                         21CrMo10

1, this technical agreement applies only to S25-267-1 of the production of the contract, the contract after the end of the agreement to be automatic invalid.

2, the size of the steel plate, appearance and allow deviation

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

2.2 steel plate roughness should comply with the provisions of the GB709.

3, main technical requirements

3.1 chemical composition

Steel smelting composition should comply with the provisions of the table (wt %).

 

 

C	Si	Mn	P	S	Cr	Mo
0.16～0.23	0.20～0.40	0.20～0.40	≤ 0.015	≤ 0.010	2.30～2.60	0.30～0.45

3.2 delivery status: the hot rolling.

3.3: mechanical properties

Provide sample after tempering mechanical properties test results.

The inspection items: room temperature tension 1 A (Re, Rm, A, ψ), normal temperature shock.