Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of alloy steel round bar 20cr2ni4a in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.
Production
20 Cr2Ni4A is widely used for large cross-section carburized parts, such as large gear, shaft, and conditioning components requiring high strength, and good toughness.
20Cr2Ni4A chemical composition %:
| Grade | Chemical composition %: | ||||||
| C | Si | Mn | P | S | Cr | Ni | |
| 20Cr2Ni4A | 0.17-0.23 | 0.17-0.37 | 0.30-0.60 | ≤0.03 | ≤0.03 | 1.25-1.65 | 3.25-3.65 |
Production
20Cr2Ni4A mechanical properties:
| Grade | Mechanical properties: | |||||
| Tensile strengthσb (Mpa) | Yield strengthσ0.2 (Mpa) | Elongationσ5 (%) | reduction of area ψ (%) | Hardness | Notched bar impact strength αkv (J/cm2) | |
| min | min | min | min | max | min | |
| 20Cr2Ni4A | 1483 | 1292 | 13 | 57 | 434HB | 75 |
Production Introduction
20Cr2Ni4A condition of delivery:
heat treatment(Normalizing, Annealing, or high temperature tempering) or do not heat treatment state.
Tensile strength b (MPa)1175
Yield strength s (MPa)1080
Elongation 5 (%)10
Section shrinkage (%)45
Impact energy Akv (J)63
Impact toughness kv (J / cm2)78
Hardness269HB
Production
20Cr2Ni4A heat treatment process:Quenching temperature: the first heating 880 ºC; the second heat 780 ºC; coolant: Oil
Tempering heating temperature: 200 ºC; Coolant: water, air
20Cr2Ni4A purposes:
For the manufacture of small and medium sized cars, tractor engine and transmission in gear, manufacture of high performance core part of carburized parts, cyanide parts, such as oil drilling and metallurgical open pit with claws and teeth cone body.
Packaging & Shipping
In order to avoid the finish products rusted and damaged during the transportation ,we will design the right packing according to the shape,size and usage of the products.
Production Introduction
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