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