Project Description

Commitment to You

We are committed to integrate steel resources in china and serve the global steel market. We have 15+ years of experience in steel researching, production, managing and sales.

Our ability to purchase materials directly from leading mills will give you the competitive edge. Any Questions Just Call +86-731-89903933

Specifications

1.A519 4130 steel tube
2.100% NDT
3.ISO9001, ISO/TS 16949
4.meet American standards
5.high accuracy

ASTM A 519 Chemical requirements

Chemical requirements of Grade 4130:

Carbon, %                           0.28-0.33

Manganese, %                        0.40-0.60

Phosphorus, max,  %                  0.040

Sulfur, max,  %                      0.040

Silicon, %                           0.15-0.35

Chromium, %                        0.80-1.10

Molybdenum, %                      0.15-0.25

 

Mechanical Properties

Grade

Designation

 Condition Ultimate

Strength, MPa

 Yield

Strength, MPa

 Elogation

in 2 in. or

50 mm, %
4130 SR 855 689 10
A 552 414 25
N 855 621 20

Your accurate descriptions in inquiry will help us give you what you need to make your search successful.

Designation Symbol Description
Cold finished (hard) BK Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.
Cold finished (soft) BKW 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).
Cold finished and stress-relieved BKS 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.
Annealed GBK The last cold forming process is followed by annealing in a controlled atmosphere.
Normalized NBK The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

 

  • Mill test certificates will be issued according to EN10204/3.1B
  • Packing:Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.
  • Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test, No-destructive Test, Hydrostatic Test.
  • Surface treatment:Oiled, black painted, hot dipped galvanized or phosphate coating as required.
  • Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

 Tests we apply to the tubes:

1) Chemical Composition Analysis

2) Mechanical Properties (Tensile strength, Yield strength,, Elongation, Hardness)

3) Technological Test (Flattening test, Flaring Test, Bending Test, Hydraulic pressure test)

4) Surface quality detection

5) Eddy-current examination

6) Visual test

Experienced 15+ Years

Our ability to purchase materials directly from leading mills at the best possible price will give you the competitive edge. This coupled with a skilled workforce dedicated to embracing the demands of the markets.

We Can Supply Follows Products with High Quality:

  1. Cold Rolled Steel Tube
  2. Cold Drawn Steel Tube
  3. Hollow Bar
  4. Honed Tube
  5. Plated Tube
  6. Plated Bar
  7. Boiler Tube

All Products According Quality Standard Strictly:

  1. ASTM: ASTM A519, ASTM A513.
  2. JIS:JIS G3441, JIS G3445, JIS G3466, JIS G3459.
  3. DIN: DIN1626, DIN1629, DIN2391, DIN2393, DIN2448, DIN2458.
  4. EN: EN10305.
  5. BS: BS6323.

Wide Range of Pipes to Fit Your Industry:

  1. OD from 5mm to 820mm.
  2. Wall Thickness from 0.1 to 100mm.
  3. Length up to 50mtr per pc.

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