20 # Precision Steel Pipe
Automobiles, machine parts, etc. have high requirements on the precision and finish of steel pipes. The current users of 20# precision steel pipes are not only users who require relatively high precision and smoothness. Because the precision of the precision bright tube is high, the tolerance can be maintained at 2--8 wire, so many machining users in order to save labor, material, and time. The loss of seamless steel pipes or round steel is slowly turning into precision bright pipes.
The production process of precision steel pipes is the same as that of ordinary seamless pipes, except for the final pickling and cold rolling process.
Precision steel pipe process
Tube billet-inspection-peeling-inspection-heating-piercing-pickling passivation-grinding-lubrication and air drying-cold rolling-degreasing-cutting-inspection-marking- -Product packaging
20# precision steel pipe inner and outer walls have no oxide layer, withstand high pressure, no leakage, high precision, high finish, cold bending without deformation, flaring, flattening without cracks, surface anti-rust treatment, widely used in precision steel pipes for hydraulic systems, injection molding Precision steel pipes for machinery, precision steel pipes for hydraulic presses, steel pipes for shipbuilding, EVA foam hydraulic machinery, seamless steel pipes for precision hydraulic cutting machines, shoemaking machinery, hydraulic equipment, high-pressure tubing, hydraulic tubing, compression fittings, steel pipes Joints, rubber machinery, forging machinery, die-casting machinery, construction machinery, high-pressure steel pipes for concrete pump trucks, sanitation vehicles, automotive industry, shipbuilding industry, metal processing, military industry, diesel engines, internal combustion engines, air compressors, construction machinery, agricultural and forestry machinery Etc., it can completely replace the imported 20# precision steel pipe GB/T3639-2018 of the same standard.
20# Precision Steel Tube Executive Standard Tensile Strength Knowledge Table
Precision steel pipe standard
GB/T3639------Chinese National Standard
GB/T8713------Chinese National Standard
Precision steel pipe use
Used in the manufacture of mechanical structures, hydraulic structures, hydraulic and pneumatic cylinders.
Mainly produce precision steel pipe grades
10, 20, 35, 45 etc.
Chemical composition, mechanical properties-refer to the corresponding national standards or foreign standards for chemical composition.
| Grade | Delivery Status | |||||
| Cold Working/Hard (y) | Cold Working/Soft (r) | Stress Relief Annealing (t) | ||||
| Tensile Strength (Mpa) | Elongation(%) | Tensile Strength (Mpa) | Elongation(%) | Tensile Strength (Mpa) | Elongation(%) | |
| ≥ | ||||||
| 10#Steel | 412 | 6 | 373 | 10 | 333 | 12 |
| 20#Steel | 510 | 5 | 451 | 8 | 432 | 10 |
| 35#Steel | 588 | 4 | 549 | 6 | 520 | 8 |
| 45#Steel | 647 | 4 | 628 | 5 | 608 | 7 |
