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Hollow Black Iron Q235 Welded Square Steel Pipe

Welded Square tube is also be used widely same as round tube, usually square tube for structure be used in industry and decorate field. This kind of tube finish can be varied much, such NO.4, HL, Grit600, Colored, Mirror.

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Hollow Black Iron Q235 Welded Square Steel Pipe
We will wholeheartedly provide you with high cost-effective Stainless Steel Sheet, stainless steel tube profiles, Duplex stainless steel wire and meticulous after-sales service. Our company keeps the principle of 'people-oriented, excellence', in the spirit of 'concentration, focus, and professionalism'. We always adhere to the service concept of maximizing the interests of customers, serve attentively, and customer first! As the core position in the industry, our company must be in line with international standards and operate in good faith in order to be invincible in the competition.

Product Description

Welded Square tube is also be used widely same as round tube, usually square tube for structure be used in industry and decorate field. This kind of tube finish can be varied much, such NO.4, HL, Grit600, Colored, Mirror.


Production Standard:

ASTM A554, JIS G3446, DIN17457, GB/T 12770, JG/T3030, YB\T 5363


Main grade mechanical property in different standard

201

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

260

515

40

-

95

217

-

JIS

275

520

40

241

100

-

253

GB

205

515

30

- 

99

-

- 

202

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

260

620

40

-

-

241

-

JIS

275

520

40

-

95

207

218

GB

-

-

-

-

-

-

-

304

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

205

515

40

-

92

201

-

JIS

205

520

40

187

90

-

200

GB

205

515

40

-

92

201

210

316L

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

170

485

40

-

95

217

-

JIS

175

480

40

187

90


200

GB

170

485

40

-

95

217

220

409

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

-

-

-

-

-

-

-

JIS

175

360

22

162

80

-

175

GB

-

-

-

-

-

-

-

409L

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

170

380

20

-

88

179

-

JIS

175

360

25

162

80

-

175

GB

170

380

20

-

88

179

200

410S

Y.S./Mpa ≥

T.S./Mpa ≥

E.L./% ≥

HB ≤

HRB ≤

HBW ≤

HV ≤

ASTM

205

415

22

-

89

183

-

JIS

205

410

20

-

88

183

200

GB

205

415

20

-

89

183

200


Production Process and Feature

About square and rectangle tube producing, the first step we make round tube, then reform to square or rectangle tube, sometime do the surface process.


Application

It's widely used on industry structure and building decorative


We have a comprehensive quality management system and are fully capable of customizing and developing a variety of new Hollow Black Iron Q235 Welded Square Steel Pipe according to our customers' needs. The core of our company's development is to keep up with the pace of the times, grasp the pulse of the market, create first-class quality and do eternal business. We firmly believe that implementing a rational style of doing things is the foundation of a company's healthy growth.
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