Cold Rolled Mechanical Steel Tubes

Mechanical steel pipes are used in machined or formed parts for industrial, automotive, agricultural machinery, aircraft, transportation, material handling and household equipment. It is produced to exact outside diameter and wall thickness dimensions.

Products Details

Product Introduction

Mechanical tubes are used in mechanical and light structural applications. Mechanical tubing is produced to meet specific end-use requirements, specifications, tolerances and chemical properties. Piping for mechanical and light structural applications. This allows for a more specific uniformity of properties throughout the pipe compared to standard pipes or ducts. Mechanical tubes can be produced to standard specifications when required, but are usually produced to "typical" performance, with a primary focus on yield strength for precise dimensions and wall thickness. In some heavily formed applications, the yield strength may not even be specified, and the production of mechanical tubes is "fit for use". Mechanical piping includes a wide range of structural and non-structural applications. We apply our metallurgical and production expertise to manufacture high-performance seamless mechanical tube products to meet your needs. This includes carbon, alloys and even custom steel grades; annealed, normalized and tempered; stress relieved and stress free; and quenched and tempered. Seamless steel pipes for machinery and automobiles, used in the manufacture and processing of automobile trunk and rear axle pipes, precision equipment, instruments and instruments.

Scope of Application

Car frame and rear axle tube. Manufacture and processing of precision equipment, instruments and instruments. Delivery terms: GBK, BKS, BK, BKW, NBK.

Product Display

Grade and Chemical Composition (%)

Grade

C

Mn

P≤

S≤

Si

Cr

Mo

1010

0.08-0.13

0.30-0.60

0.04

0.05

-

-

-

1020

0.18-0.23

0.30-0.60

0.04

0.05

-

-

-

1045

0.43-0.50

0.60-0.90

0.04

0.05

-

-

-

4130

0.28-0.33

0.40-0.60

0.04

0.05

0.15-0.35

0.80-1.10

0.15-0.25

4140

0.38-0.43

0.75-1.00

0.04

0.05

0.15-0.35

0.80-1.10

0.15-0.25

Typical Mechanical Properties

Grade

Condition

Tensile strength

Yield stength

Elongation

Mpa(min)

Mpa(min)

%(min)

1020

CW

414

483

5

SR

345

448

10

A

193

331

30

N

234

379

22

1025

CW

448

517

5

SR

379

483

8

A

207

365

25

N

248

379

22

4130

SR

586

724

10

A

379

517

30

N

414

621

20

4140

SR

689

855

10

A

414

552

25

N

621

855

20

Special Configurations

Tubular Products special seamless tubing configurations start with the highest quality steels. Grade, chemical analysis and surface condition are carefully considered, and production processes are tailored to achieve the best tubing for the end use. The configurations are formed from round tube by cold drawing. The tube is drawn over a shaped mandrel or through a shaped die, or both. Improved tolerances, finishes and mechanical properties result. Seamless and welded tubes for mechanical and general engineering applications. Tubes for construction and structural purposes such as civil structures, foundations, etc.

Standard

Steel Grade

EN

10297

E355

10210-1/2

S235JRH, S275JOH, S275J2H, S355JOH, S355J2H

10219-1/2

DIN

1629/2448

St-52

ASTM

A500

Gr. A, Gr. B

A501

A618

Gr. I, Gr. II, Gr. III

Dimensional Tolerance

Supply Conditions

Steel Tubes Provided according to Outside Diameter and Wall Thickness

Steel Pipes Provided according to Outside Diameter, Inside Diameter and Wall Thickness

Steel Tubes with the Outside Diameter of 77 mm, Inside Diameter of 57 mm and the Wall Thickness of 10 mm

Allowable Deviation of Diameter and Wall Thickness Size (mm) Allowable Deviation (%) Size Allowable Deviation Size Allowable Deviation
Outside Diameter ±1.0 Outside Diameter ±1.0% Outside Diameter +1.0 mm-0.55 mm
Wall Thickness ≤ 7

6

﹥7-15

2.5

Inside Diameter ±1.75% Inside Diameter +1.5 mm-0.5 mm
﹥15

5

Wall-Thickness-Difference ≤ 15% of Nominal Wall Thickness Wall-Thickness-Difference ≤ 15% of Nominal Wall Thickness

Check and Surface Treatment

Check and test: Chemical composition, mechanical properties, appearance and dimensional testing, non-destructive testing, particle size testing. Surface treatment: Oil immersion, varnish, shot peening.

ASTM Standards for Mechanical Tubing

Abbr

Corresponding

Application

A511 ASTM A511 / A511M Specification for Seamless Stainless Steel Mechanical Tubing
A512 ASTM A512 / ASME SA512 Specification for Cold-Drawn Buttweld Carbon Steel Mechanical Tubing
A513 ASTM A513 / A513M Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing
A519 ASTM A519 / A519M Specification for Seamless Carbon and Alloy Steel Mechanical Tubing
A554 ASTM A554 Specification for Welded Stainless Steel Mechanical Tubing

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