Certificates

WYJ050-2005                                 WPHY70

1, steel brand: WPHY70.

2, suitable for: the technology conditions suitable for pressure vessel pipe specifications with thickness no more than 42 mm WPHY70 steel production and inspection.

3, delivery status: the hot rolling condition.

4 and the production process: steel smelting furnace and the vacuum to take off the gas, calcium and the treatment of the fine grain pure titanium calm steel, and mechanical control using the hot rolling process (TMCP) production.

5, chemical components (melting and finished product) (wt %) :

 

C

Si

Mn

P

S

Cr

Mo

Ni

Nb

V

Ti

B

Cu

N

Ceq

0.08 ～0.12

0.20 ～0.35

1.30 ～ 1.60

≤0.018

≤0.005

≤0.15

0.15 ～ 0.25

0.15 ～ 0.30

0.04 ～0.08

≤0.05

≤0.025

≤0.003

≤0.30

≤0.01

≤0.44

Note ：Ceq=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15

6、Provide mechanical performance measured value of steel plate：σ_t0.5(σs)、σb、δ、AKV(-30℃)、cold bend、HV10。

7, each furnace every thickness specifications batch sample coating performance, and accord with:

σt0.5 (σs) ≥485 Mpa;

Horizontal 30 ℃quartile impact≥60 J;

The impact of the fracture shear ≥50%.

8, inclusion level: A, B, C, D each not greater than 3.0 magnitude.

9, delivery status steel plate grain degrees: frequency 8.5 magnitude.

10, steel plates roughness: no more than 8 mm/m.

11, sampling method, inspection method, inspection rule, dimension tolerance executive ASTM A20.

12, matters not confirmed according to executive ASTM A20.