Certificates

WYJ009-2005                      SA387Gr22C12

1. The applicable scope

This technology can be used in making conditions such as hydrogenation reactor reforming the hydrogen use SA387Gr22C12 equipment steel plate.

2. Steel plate size, shape, quality, and deviation should be allowed to meet ASME SA20/20 M of the provisions of the standard.

3. Technical requirements

3.1 chemical composition

The chemical composition of the steel plate should be in accordance with table 1

Table 1  Wt％

 

composition

C

Si

Mn

P

S

Cr

Mo

Ni

Cu

Sb*

Sn*

As*

[H]*

Melting analysis

0.05～0.15

≤0.10

0.30～0.60

≤0.010

≤0.010

2.00～2.50

0.90～1.10

≤0.20

≤0.20

≤0.003

≤0.015

≤0.015

≤2ppm

Produce analysis

0.05～0.15

≤0.15

0.25～0.66

≤0.012

≤0.012

1.88～2.62

0.85～1.15

≤0.20

≤0.20

≤0.003

≤0.015

≤0.015

≤2ppm

Note: (1) * * residual trace element analysis results do only records, does not make the acceptance conditions.

(2) smelting furnace, finished product analysis according to analysis by rolling a sampling inspection.

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

J = (Si + Mn) (P + Sn) x 104 or 120 (%)

Type of element to percentage content

X = (10 P + 5 Sb + 4 Sn + As) X 10-2 than 15 PPM

Type of element to the content isPPM

3.2 delivery status

Steel plate to normalized(allows cooling) + tempering state delivery.

3.3 all steel plate with its inspection simulate billet doingPWHT

 process system for:

The biggest simulation after welding heat treatment: Max,PWHT

 PWHT: 690 ±14 ℃×26 + 20 Hr

Minimum PWHT : the Min, PWHT: 690 ±14 ℃x 8-2 Hr

3.4 mechanical properties

The mechanical properties of the steel plate should comply with the provisions of the table 2 (sample for simulation of heat treatment after welding state)

Table 2

 

Rm（Mpa）	Rp0.2（Mpa）	A5（％）	Z％	cold impact test b＝2a	－30℃charpy impact test A,J
515~690	≥310	18	40	B	≥54(average) ≥48(single valute)

 

Note: 1. The high temperature stretching temperature and performance should be indicated in the contract

2. A: impact test, shall be recorded lateral expansion value and fibrous fracture percentage for reference

B: no more than 100 mm thickness T, d = 3 a; T > 100, d = 3.5 a