Certificates

WYJ005-2003                  15CrMoR/H

1. The technology conditions apply to 8 ~ 50 mm thickness coke tower with 15 CrMoR (H) of steel production and inspection.

2. Technical requirements

2.1 chemical composition

The chemical composition of steel (melting analysis) should be in accordance with table 1 (Wt %)

Chart 1

 

C	Si	Mn	P	S	Cr	Mo	Cu	Ni
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

 

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

Ni≤0.25％。

2.2 delivery status: the steel plate to normalizing + tempering state delivery

2.3 the after welding steel by simulating the mechanical properties of the heat treatment should comply with the provisions of the table 2.

 

Chart 2

 

σs MPa	σb MPa	δ5 ％	ψ %	Room temperature horizontalAKU J	0℃transverseAKV J	cold bend 180° b=2a
≥295	450～590	≥19	≥45	average≥80 single value≥60	average≥60 single value≥45	D＝2a