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Zhangjiagang Huadian Import & Export Co., Ltd.
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A519 seamless carbon and alloy steel mechanical tubing
Seamless precision steel tubes are used variously:
• equipment engineering
• elevator tubes
• gas cylinders
• pit props
• hydraulic lines
• chain pipes
• bicycle/ motorcycle frames
• rivets
• pumps
• technical machinery
• cylinder, piston and telescopic tubes
• stabiliser tubes
• gear box tubes
• drive shaft tubes
Tubes for automotive industry:
• axles for gearboxes
• fuel injection lines
• piston bolts
• ball cages
• steering wheel shafts column tubes
• power-assisted steering tubes
ASTM A 519 Chemical requirements
Grade Designation | Chemical Composition Limits, % | |||
Carbon | Manganese | Phosphorus, max | Sulfur, max | |
MT 1010 | 0.05-0.15 | 0.30-0.60 | 0.040 | 0.050 |
MT 1015 | 0.10-0.20 | 0.30-0.60 | 0.040 | 0.050 |
1008 | 0.10 max | 0.30-0.50 | 0.040 | 0.050 |
1010 | 0.08-0.13 | 0.30-0.60 | 0.040 | 0.050 |
1020 | 0.18-0.23 | 0.30-0.60 | 0.040 | 0.050 |
1025 | 0.22-0.28 | 0.30-0.60 | 0.040 | 0.050 |
1035 | 0.32-0.38 | 0.60-0.90 | 0.040 | 0.050 |
1045 | 0.43-0.50 | 0.60-0.90 | 0.040 | 0.050 |
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, % |
1020 | CW | 483 | 414 | 5 |
SR | 448 | 345 | 10 | |
A | 331 | 193 | 30 | |
N | 379 | 234 | 22 | |
1025 | CW | 517 | 448 | 5 |
SR | 483 | 379 | 8 | |
A | 365 | 207 | 25 | |
N | 379 | 248 | 22 | |
1035 | CW | 586 | 517 | 5 |
SR | 517 | 448 | 8 | |
A | 414 | 228 | 25 | |
N | 448 | 276 | 20 | |
1045 | CW | 621 | 552 | 5 |
SR | 552 | 483 | 8 | |
A | 448 | 241 | 20 | |
N | 517 | 331 | 15 | |
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