GB3639 Steel Pipe

  • Description
Product Detail

Changzhou Hongtai Precision Steel Pipes Co. specializes in steel pipes manufacturing and trading for many years, enjoys a great reputation in China. Our products are famous for their high quality and wide size range.

Product Name

10# steel pipe

20# steel pipe

35# steel pipe

45# steel pipe

Q345B steel pipe

chemical analysis

C:0.07-0.13;Si:0.17-0.37;Mn:0.35-0.65;P: 0.035; S: 0.035;Ni 0.30;Cr: 0.15;Cu 0.25

C:0.17-0.23;Si:0.17-0.37;Mn:0.35-0.65;P: 0.035; S: 0.035;Ni 0.25;Cr: 0.25;Cu 0.25

C :0.32~0.40;Si:0.17~0.37; Mn:0.50~0.80;S : 0.035; P : 0.035;Cr: 0.25;Ni: 0.25;Cu: 0.25

C:0.42~0.50;

Si:0.17~0.37

Mn:0.50~0.80

P:  0.035

S:  0.035

Cr: 0.25

Ni: 0.25

Cu: 0.25

C:  0.20;

Si: 0.55;

Mn: 1.70;

P:  0.040

S:  0.040

V:0.02-0.15

Nb:0.015-0.060;

Ti: 0.02-0.20

Tensile Strength

+C, 430MPa;+LC 380MPa;+SR, 400MPa;+A, 335MPa;+N,320-450MPa

+C, 550MPa;+LC 520MPa;SR, 520MPa;+A, 390MPa;+N,440-570MPa

+C, 590MPa;+LC 550MPa; +A, 510MPa;+N, 460MPa

+C, 645MPa;+LC 630MPa; +A, 590MPa;+N, 540MPa

+C, 640MPa;+LC 580MPa;  SR, 580MPa;+A, 450MPa;+N,490-630MPa

Yield strength

+SR, 300MPa; +N, 215MPa

+SR, 375MPa; +N, 255MPa

+N, 280MPa

+N, 340MPa

+N, 355MPa

Standard

GB3639

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 (hard)   BK(+C)

Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation

  1. Cold finished (soft)    BKW(+LC)

The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding)

  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)

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 automobile and motorcycle

Main Market

Asia, Middle East, Europe, etc.

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Changzhou Hongtai Precision Steel Pipe Co.,Ltd

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