Certificates
WYJ019-2005 1.25Cr－0.5Mo－Si
1. The applicable scope
This technical condition applies only to sinopec Beijing yanshan branch catalytic gasoline desulfurization with adsorption device
The hydrogen 1.25 Cr-0.5 Mo-Si steel plates.
2. The size, shape, quality and allow deviation
The size of the steel plate, appearance, quality, and deviation should be allowed to meet SA387 / SA387M ASME of the provisions of the standard.
3. Technical requirements
3.1 the chemical composition of the steel plate should be in accordance with table 1
Table 1 Wt％
|
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
Ni
|
Cu
|
Sb
|
Sn
|
As
|
[H]*
|
|
Mealtime analysis
|
≤0.17
|
0.10～0.50
|
1.00～1.60
|
≤0.020
|
≤0.010
|
0.60～1.00
|
0.20～0.40
|
0.20～0.40
|
0.005～0.020
|
≤0.003
|
≤0.015
|
≤0.016
|
≤2ppm
|
|
Product analysis
|
≤0.17
|
0.05～0.56
|
0.95～1.70
|
≤0.025
|
≤0.010
|
0.55～1.05
|
0.15～0.44
|
0.15～0.45
|
0.001～0.025
|
≤0.003
|
≤0.015
|
≤0.016
|
≤2ppm
|
* record the results of analysis of elements, not as an acceptance conditions.
Steel product analysis (including the X factor) according to rolling out a sampling inspection.
A) embrittlement of tempering sensitivity modulus should comply with the following requirements:
X = (10 P + 5 Sb + 4 Sn + As) X 10-2 than 15 PPM
Type of element to the content of PPM generation, such as 0.01% to 100 PPM
3.2 delivery status: the steel plate to normalized(allows cooling) + tempering state delivery.
3.3 to the steel plate with try everything all inspection simulation billet after welding heat treatment process system for:
The biggest simulation after welding heat treatment: 690 + 14 ℃×20 + 20 h
Minimum simulation welding heat treatment: 690 + 14 ℃x 6 + 20 h
3.4 mechanical properties should be consistent with the provisions of the table 2 (sample for simulation of heat treatment after welding state).
Table 2
|
Rm （Mpa）
|
Rp0.2 （Mpa）
|
A50
（%）
|
Z
（%）
|
cold impact test
|
A single high yield strength
Rp0.2 （Mpa）
|
＋10℃charpy impact test energy
J
|
－20℃charpy impact test energy
J
|
|
515～690
|
≥310
|
22
|
45
|
A
|
B
|
≥54
(average)
≥48
(single value)
|
≥43
(average)
≥34
(single value)
|
注：A:thicknessT≤25mm，d=1.5T，25mm＜T≤100mm，d=2.0T。
B:satisfy at the same time470℃Rp0.2＞214.0 Mpaand 538℃Rp0.2＞194.5 Mpa。
;)
