Certificates

WYJ035-2005                           15CrMoR

1, applicable scope

The technology conditions apply to thickness not greater than 60 mm in 15 CrMoR fine grain calm hydrogen steel plates.

2, technical requirements

2.1 chemical composition: the chemical composition of steel (melting analysis) should be in accordance with table 1 (wt %)

Table 1

 

C	Si	Mn	P	S	Cr	Mo	Cu	Ni	Sb*	Sn*	As*
0.12/ 0.18	0.15/ 0.40	0.40/ 0.70	≤0.012	≤0.010	0.80/ 1.20	0.45/ 0.60	≤0.20	≤0.20	≤0.003	≤0.015	≤0.016

Note: (1) melting analysisaccording to each furnace (pot), sampling, finished product analysis should be according to the steel rolling by piece to take a sample, the deviation should be allowed to meet the provisions of GB222, P≤0.015%,S≤0.012%,Cu≤0.20%,Ni≤0.25%。

 (2) * residual element analysis with melting finished product requirement analysis, the results only do records, does not make the acceptance conditions.

(3) embrittlement of tempering sensitivity modulus (X) should meet the following requirements:

X＝（10P+5Sb+4Sn+As）×10^-2≤15PPm

Type of element are in PPm content replace into, such as the 0.01% to 100 PPm replace into.

2.2 delivery status: steel to normalizing + tempering state delivery.

2.3 mechanical properties

2.3.1 sample to simulate the mechanical properties of welding heat treatment should comply with the provisions of the table 2.

Table 2

 

specification	σs MPa	σb MPa	δ5 %	ψ %	-10℃AKV （transverse）J	0℃AKV （transverse ）J	Cold bend 180°
≤60	≥295	450～590	≥19	≥45	average value≥31	average value≥55 average value≥41	b=2a d=3a

2.3.2The tensile test plate  high temperature (sample for simulation of heat treatment after welding state), steel plate heat temperature 300 ℃tensile test,σ_0.2≥210Mpa(or shall be separately prescribed high temperature in the contract,).