TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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DIN2393-2 St52.3 Welded Precision Carbon Car Shock Absorber Steel Tube
1. Quick Detail:
Black Phosphated Hydraulic Tubes with High Precision
EN10305-1, EN10305-4, DIN2391,
E235, E355, ST37.0, ST44.0, ST52.0
Steel Pipes with high precision for Hydraulic Systems Black Phosphating
2. Production process:
DIN series tubes, cold drawn and bright annealed precision seamless steel tube is used as the tube to be phosphated. The phosphorization is realized with the imported chemical fluid to form a black film. The antirust oil is absorbed by means of the micropore on the film to prevent the tubes from getting rust.
Chemical composition:
|
Standard
|
Steel Grade
| C(%) | Si(%) | Mn(%) | S(%) | P(%) |
| DIN 2391 DIN2393-2 | St35 | ≤0.17 | ≤0.35 | ≥0.40 | ≤0.025 | ≤0.025 |
| St37 | ≤0.17 | ≤0.35 | ≥0.40 | ≤0.025 | ≤0.025 | |
| St37.4 | ≤0.17 | ≤0.35 | ≥0.40 | ≤0.025 | ≤0.025 | |
| St45 | ≤0.21 | ≤0.35 | ≥0.40 | ≤0.025 | ≤0.025 | |
| St44 | ≤0.21 | ≤0.35 | ≥0.40 | ≤0.025 | ≤0.025 | |
| St52 | ≤0.22 | ≤0.35 | ≥1.60 | ≤0.025 | ≤0.025 |
Mechanical Properties:
| Standard | Steel Grade | Mechanical Performance | ||||
| GBK(+A) | NBK(+N) | |||||
| Tensile Strength (Rm mpa) | Elongation rate (A5 %) | Tensile Strength (Rm mpa) | Yield Strength (Reh mpa) | Elongation rate (A5 %) | ||
| DIN 2391 DIN2393-2 | St35 | ≥315 | ≥25 | 346-478 | ≥235 | ≥25 |
| St37 | ≥315 | ≥25 | 346-478 | ≥235 | ≥25 | |
| St37.4 | ≥315 | ≥25 | 346-478 | ≥235 | ≥25 | |
| St45 | ≥390 | ≥21 | 440-570 | ≥255 | ≥21 | |
| St44 | ≥390 | ≥21 | 440-570 | ≥255 | ≥21 | |
| St52 | ≥490 | ≥22 | 490-630 | ≥355 | ≥22 | |
3. Main Features:
Bright black color is homogeneously distributed on the tube surface. The tube has good property of antirust.
4. Main Application:
For auto industry, machinery use, oil cylinder, motorcycle shock absorber.
5. Our products are widely used in:
Engineering machinery Machine tool industry Hydraulic industry Special vehicle
Automobile pipeline Heavy machinery Compressor Shipbuilding industry
Railway locomotive Diesel engine Utility boiler Injection molding machine
Power equipment Heavy duty automobile Forging and stamping machine
6. Main Characteristics:
No Oxidation Layer on the Outer and Inner Walls
No Crack under Flaring and Flattening
No Leakage under High Pressure
No Distortion after Cold Bending
High Precision High Cleanness Excellent Brightness
Packing: Seamless steel tube packed in bundles, in wooven bags.
Products from production line:
For application of Shock Absorbers: