Heavy Thick Wall Steel Tubing For Auto Parts 1010 1020 STKM11A STKM12A 12B
1010 1020 1045 4130 4140 Heavy Thick Wall Steel Tubing For Auto parts
China Precision Steel Tube leading supplier, choose the high quality Hydraulic Precision Steel Tube, Precision Carbon Steel Tube, Precision Seamless Steel Tube, CDS Steel Tube, CDW Steel Tube
Wall thickness 4-50mm
Diameter 16.5-350mm
Length 5-6m Upon request
| Material | 45# 16Mn 35# 20# 10# 40Cr 20Cr 20CrMo 20CrMnTi 40MnMoV 42CrMo 10Mn2 15Cr 30CrMnSi STKM11A STKM12A STKM12B SAE1010 1020 1045 |
| Stanard | ASTM A519 ASTM A500 ASTM A501 JIS G3441 JIS G3444 ASTM A53 DIN1629 GOST8734-75 and others |
| Tolerance | The common difference of inner diameter could be controlled i the scope of 0.1mm |
| Heat Treatment | Annealing, Quenching and tempering, Hot rolled |
| Surface | Pickling and Phosphating |
Application :Diesel(compression-ignition)engines
Produce method: shall be manufactured from unalloyed quality steel or an equivalent steel produced by a steel-making process that ensures a very homogeneous structure.
The final reduction of the tube shall be followed by treatment to achieve the specified mechanical properties. Please advise.
Characteristic:Precision,Smooth finish,Cleanliness,High mechanical properties.
Delivery condition: NBK/GBK.
Tolerance:
Inside diameter ,d
d≤4mm:±0.05mm for class2 (for diesel (compression-ignition)engines)
±0.025mm for class 1(for fuel injection pump testing)
d＞4mm:±0.10mm
Outside diameter,D
D＜8mm:±0.06mm
D≥8mm: ±0.10mm
For Class 1 and Class2 Please refer above explain.
The maximum value of the concentricity of the tube outside diameter relative to inside diameter shall be proportional to the wall thickness, as shown in Figure1.
QUALITY CONTROL:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking
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