chemical analysis

C:0.17-0.23;Si:0.17-0.37;Mn:0.35-0.65;P: 0.025; S: 0.015

C:0.17-0.23;Si:0.17-0.37;Mn:0.70-1.00;P: 0.025; S: 0.015;

C:0.22-0.27;Si: 0.17-0.37;Mn: 0.17-1.00;P: 0.025; S: 0.015

C:0.08-0.15;Si: 0.17-0.37;Mn: 0.40-0.70;P: 0.025; S: 0.010;Cr:0.90-1.20;Mo:0.25-0.35;V:0.15-0.30

C:0.12-0.18;Si: 0.17-0.37;Mn: 0.40-0.70;P: 0.025; S: 0.015; Cr:0.80-1.10;Mo:0.40-0.55

Tensile Strength

410-550MPa

415-560MPa

485-640MPa

470-640MPa

440-640MPa

Yield strength

245

240

275

255

295

Standard

GB5310

Length

As customer s request

Packaging

Standard export packing, packed in woven bags, with two nylon slings, or can be customized as request

Heat Treatment/      Delivery Condition

1. Cold finished and stress-relieved annealing BKS(+SR)

Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.

1. Annealed    GBK(+A)

The last Cold forming process is followed by annealing in a controlled atmosphere.

1. Normalized   NBK(+N)

2. The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Delivery Time

Within 35-50 days from receiving deposit

Payment Term

100% L/C at sight or 30% deposit, 70% balance against copy of B/L

Usage/Application

Pipes for high pressure boiler

Main Market

Asia, Middle East, Europe, etc.