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Square Stainless Steel Tube

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Square Stainless Steel Tube
Square Stainless Steel Pipe
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Name
Square Stainless Steel Tube
Grade
ASTM201;ASTM304/304L;ASTM310S;ASTM316/316L;ASTM321
Standard
ASTM/DIN/GB/JIS/AISI
Surface
No.1/2B/BA/NO.4/6K/8K/HL(Hairline)/Matting
Payment Term
T/T;L/C;WesternUnion;Paypal
Delivery Time
7-15 days upon receipt of the deposit
Package
Standard Export Packing or As Customers Requirement
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Product introduction

SUBTITLE

Stainless steel square tube:

Introduction:

The stainless steel square tube is a hollow long steel bar. Because the cross section is square, it is called a square tube. A large number of pipelines used to transport fluids, such as petroleum, natural gas, water, gas, steam, etc. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structures.

Classification:

Stainless steel square tube classification: square tube is divided into seamless steel pipe and welded steel pipe (seam pipe). According to the shape of the section, it can be divided into square and rectangular tubes. Round steel tubes are widely used, but there are also some semi-circular, hexagonal, equilateral triangle, octagonal and other special-shaped steel tubes.

For stainless steel square pipes that are subjected to fluid pressure, hydraulic tests are required to check their pressure resistance and quality. No leakage, wetting or expansion under the specified pressure is qualified. Some steel pipes are also rolled according to standards or demander requirements Side test, flaring test, flattening test, etc.

Square tube specification: 5*5~150*150 mm thickness: 0.4~6.0 mm

Material of square tube: 304, 304L, TP304, TP316L, 316, 316L, 316Ti, 321, 347H, 310S [1]

Production Process:

Round steel preparation → heating → hot rolling piercing → cutting head → pickling → grinding → lubrication → cold rolling → degreasing → solution heat treatment → straightening → pipe cutting → pickling → finished product inspection.

Performance analysis:

Metals can react with oxygen in the atmosphere to form an oxide film on the surface. The iron oxide formed on ordinary carbon steel will continue to oxidize, causing rust to continue to expand and eventually form holes. This can use paint or oxidation-resistant metal for electroplating to protect the carbon steel surface, but this protective layer is just a thin film, if the protective layer is damaged, the underlying steel will begin to rust again. Whether the stainless steel pipe is corroded is related to the chromium content in the steel. When the chromium content in the steel reaches 12%, a layer of passivated, dense chromium-rich oxide is formed on the surface of the stainless steel pipe in the atmosphere to protect the surface and prevent it Further reoxidized. This oxide layer is extremely thin, through which you can see the natural luster of the steel surface, giving stainless steel a unique surface. If the chromium film is destroyed, the chromium in the steel and the oxygen in the atmosphere regenerate a passive film and continue to play a protective role. In some special environments, stainless steel will also fail due to some local corrosion, but stainless steel and carbon steel will not fail due to uniform corrosion, so the corrosion margin is meaningless for stainless steel pipes.

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Product details

Product details

  Square Stainless Steel Tube

 ASTM 304/304L Stainless Steel Tube/Pipe
Product: ASTM 304/304L Stainless Steel Tube/Pipe
Material:Stainless Steel 200 series,300series,400series
Standard:ASTM/AISI/DIN/JIS/GB….
Dimension:Thickness:0.3MM-6MM,OD:8MM-325MM
Length:Random Length
Surface Finish:No.1/2B/No.4/4K/6K/8K/HL/Matt
Tchnology:Cold Rolled ,Hot Rolled 
MOQ:1TON
Package:Standard Export Packing,Or As Per Your Requirement
Application:Railings,Staircase Railing Balustrade,Windows,Balustrsde System,Equipment Manufacturing and Maintenance,etc.

Product area display

Mechanical Property
ASTMTS(Mpa)≥YS(Mpa)≥EL(%)≥Hardness
HBHRB
20152027540241100
2025202754020795
3015202054020795
304520205402090
304L4801754018790
309S5202054018790
3105202054018790
310S5202054018790
3165202054018790
316L4801754018790
316Ti5202054018790
317L4801754018790
3215202054018790
4304502052218388
904L49021635

2205640
25

Chemical Composition


Chemical Composition(%)
CSiMnPSNiCrMoCuNOther
1Cr17Mn6Mi5N2010.151.00 5.5-5.70.06 0.03 3.3-3.516-18__0.05-0.25
1Cr18Mn8Mi5N2020.151.00 7.5-100.06 0.03 4.0-6.017-19__0.05-0.25
1Cr18Mn8Mi5N3010.151.00 2.00 0.07 0.03 6.0-8.016-18__0.10 
0Cr18Ni93040.071.00 2.00 0.0350.03 8.1-10.017-19___
0Cr18Ni9309S0.081.00 2.00 0.0350.03 12.0-15.022-24___
0Cr25Ni20310S0.081.00 2.00 0.0350.03 19.0-22.024-26___
0Cr17Ni12Mo23160.081.00 2.00 0.0350.03 10.0-14.016-18.52.0-3.0__
00Cr17Ni14Mo2316L0.081.00 2.00 0.0350.03 12.0-15.016-182.0-3.0__
0Cr18Ni12Mo3Ti316Ti0.081.00 2.00 0.0350.03 11.0-14.016-192.5-3.5__Ti≥5C
0Cr18Ni12Mo3Ti317L0.031.00 2.00 0.0350.03 11.0-15.018-203.0-4.0__
1Cr18Ni9Ti3210.121.00 2.00 0.0350.03 8.0-11.017-19___Ti5C-0.70
1Cr124300.121.00 2.00 0.0350.03 0.60 16-18___
00Cr20Ni25Mo4.5Cu904L0.021.00 2.00 0.0350.03 23.0-28.019-234.0-5.01.0-2.00.14-0.20
00Cr2Ni5Mo3N22050.031.00 2.00 0.0350.02 4.5-6.521-232.5-3.5__
Stainless steel national standard _ stainless steel implementation standard _ national stainless steel grade comparison table

No

China GB

Japan

United States

Korea

EU

India

Australia

Taiwan, China

Old grade

New grade(07.10)

JIS

ASTM

UNS

KS

BS EN

IS

IS

CNS

Austenitic stainless steel

1

lCrl7Mn6Ni5N

12Crl7Mn6Ni5N

SUS201

201

S20100

STS201

1.4372

10Crl7Mn6Ni4N20

201-2

201

2

lCrl8Mn8NI5N

12Crl8Mn9Ni5N

SUS202

202

S20200

STS202

1.4373

 

-

202

3

lCrl7Ni7

12Crl7Ni7

SUS301

301

S30100

STS301

1.4319

10Crl7Ni7

301

301

4

0Crl8Ni9

06Crl9Nil0

SUS304

304

S30400

STS304

1.4301

07Crl8Ni9

304

304

5

00Crl9Nil0

022Crl9Nil0

SUS304L

304L

S30403

STS304L

1.4306

02Crl8Nill

304L

304L

6

0Crl9Ni9N

06Crl9Nil0N

SUS304N1

304N

S30451

STS304N1

1.4315

-

304N1

304N1

7

0Crl9Nil0NbN

06Crl9Ni9NbN

SUS304N2

XM21

S30452

STS304N2

-

-

304N2

304N2

8

00Crl8Nil0N

022Crl9Nil0N

SUS304LN

304LN

S30453

STS304LN

-

-

304LN

304LN

9

lCrl8Nil2

10Crl8Nil2

SUS305

305

S30500

STS305

1.4303

-

305

305

10

0Cr23Nil3

06Cr23Nil3

SUS309S

309S

S30908

STS309S

1.4833

-

309S

309S

11

0Cr25Ni20

06Cr25Ni20

SUS310S

310S

S31008

STS310S

1.4845

-

310S

310S

12

0Crl7Nil2Mo2

06Crl7Nil2Mo2

SUS316

316

S31600

STS316

1.4401

04Crl7Nil2Mo2

316

316

13

0Crl8Nil2Mo3Ti

06Crl7Nil2Mo2Ti

SUS316TI

316TI

S31635

-

1.4571

04Crl7Nil2MoTi20

316Ti

316TI

14

00Crl7Nil4Mo2

022Crl7Nil2Mo2

SUS316L

316L

S31603

STS316L

1.4404

~02Crl7Nil2Mo2

316L

316L

15

0Crl7Nil2Mo2N

06Crl7Nil2Mo2N

SUS316N

316N

S31651

STS316N

-

-

316N

316N

16

00Crl7Nil3Mo2N

022Crl7Nil3Mo2N

SUS316LN

316LN

S31653

STS316LN

1.4429

-

316LN

316LN

17

0Crl8Nil2Mo2Cu2

06Crl8Nil2Mo2Cu2

SUS316J1

-

-

STS316J1

-

-

316J1

316J1

18

00Crl8Nil4Mo2Cu2

022Crl8Nil4Mo2Cu2

SUS316J1L

-

-

STS316J1L

-

-

-

316J1L

19

0Crl9Nil3Mo3

06Crl9Nil3Mo3

SUS317

317

S31700

STS317

-

-

317

317

20

00Crl9Nil3Mo3

022Crl9Nil3Mo3

SUS317L

317L

S31703

STS317L

1.4438

-

317L

317L

21

0Crl8Nil0Ti

06Crl8NillTi

SUS321

321

S32100

STS321

1.4541

04Crl8Nil0Ti20

321

321

22

0Crl8NillNb

06Crl8NillNb

SUS347

347

S34700

STS347

1.455

04Crl8Nil0Nb40

347

347

Austenitic-ferritic stainless steel (duplex stainless steel)

23

0Cr26Ni5Mo2

-

SUS329J1

329

S32900

STS329J1

1.4477

-

329J1

329J1

24

00Crl8Ni5Mo3Si2

022Crl9Ni5Mo3Si2N

SUS329J3L

-

S31803

STS329J3L

1.4462

-

329J3L

329J3L

0Crl8Nil0Ti ferritic stainless steel

25

0Crl3AI

06Crl3Al

SUS405

405

S40500

STS405

1.4002

04Crl3

405

405

26

-

022CrllTi

SUH409

409

S40900

STS409

1.4512

-

409L

409L

27

00Crl2

022Crl2

SUS410L

-

-

STS410L

-

-

410L

410L

28

lCrl7

10Crl7

SUS430

430

S43000

STS430

1.4016

05Crl7

430

430

29

lCrl7Mo

10Crl7Mo

SUS434

434

S43400

STS434

1.4113

-

434

434

30

-

022Crl8NbTi

-

-

S43940

-

1.4509

-

439

439

31

00Crl8Mo2

019Crl9Mo2NbTi

SUS444

444

S44400

STS444

1.4521

-

444

444

Martensitic stainless steel

32

lCrl2

12Crl2

SUS403

403

S40300

STS403

-

-

403

403

33

lCrl3

12Crl3

SUS410

410

S41000

STS410

1.4006

12Crl3

410

410

34

2Crl3

20Crl3

SUS420J1

420

S42000

STS420J1

1.4021

20Crl3

420

420J1

35

3Crl3

30Crl3

SUS420J2

-

-

STS420J2

1.4028

30 Crl3

420J2

420J2

36

7Crl7

68Crl7

SUS440A

440A

S44002

STS440A

-

-

440A

440A

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