spring steel
Spring steel refers to special steel grades for manufacturing various springs and other elastic components. Springs mainly include leaf springs, coil springs and other elastic elements. The main function is to absorb impact energy and ease mechanical vibration and impact.
Spring steel is divided into non-alloy spring steel (ie carbon spring steel) and alloy spring steel. Alloy spring steel: generally contains 0.45%~0.70% carbon and a certain amount of alloying elements such as Si, Mn, Cr, V, W and B. The addition of alloying elements improves the anti-relaxation properties of the spring steel and improves the toughness of the steel. Carbon spring steel: The steel contains 0.60%~0.90% carbon and 0.3%~1.20% manganese, no other alloying elements are added, and the cost is low.
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| Steel Grade | GB | ISO | AISI | JIS | DIN | NF |
| 20Cr | GB20Cr | 20Cr4 | 5120 | SCr22,SCrl20 | 20Cr4 | - |
| 30Cr | GB34Cr4 | 34Cr4 | 5130 | SCr2,SCr430 | 34Cr4 | 34Cr4 |
| 35Cr | GB35Cr | 34Cr4 | 5132 | SCr3,SCr435 | 34Cr4 | 34Cr4 |
| 40Cr | GB40Cr | 37Cr4 | 5140 | SCr4,SCr440 | 41Cr4 | 41Cr4 |
| 45Cr | GB45Cr | 41Cr4 | 5145 | SCr5,SCr445 | 41Cr4 | 41Cr4 |
| 50Cr | GB50Cr | - | 5150 | SCr445 | - | - |
| 20CrMo | - | 18CrMo4 | - | SCM22.SCM430 | - | 25CrMo4 |
| 30CrMo | GB30CrMo | 25CrMo4 | 4130 | SCM2,SCM430 | 25CrMo4 | 25CrMo4 |
| 30CrMoA | GB30CrMoA | 34CrMo4 | 4130 | SCM430 | 34CrMo4 | 34CrMo4 |
| 35CrMo | GB35CrMo | 34CrMo4 | 4137 | SCM3,SCM435 | 34CrMo4 | 34CrMo4 |
| 42CrMo | GB42CrMo | 42CrMo4 | 4140 | SCM440 | 42CrMo4 | 42CrMo4 |
| Steel Grade | Chemical Composition (%) | |||||||
| C | Mn | Si | S | P | Cr | Cu | Ni | |
| # 45 | 0.42-0.50 | 0.50-0.80 | 0.17-0.37 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.30 |
| # 50 | 0.47-0.55 | 0.50-0.80 | 0.17-0.37 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.30 |
| # 55 | 0.52-0.60 | 0.50-0.80 | 0.17-0.37 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.30 |
| # 60 | 0.57-0.65 | 0.50-0.80 | 0.17-0.37 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.30 |
| # 70 | 0.67-0.75 | 0.50-0.80 | 0.17-0.37 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.30 |
| 65Mn | 0.62-0.70 | 0.90-1.20 | 0.17-0.37 | ≤0.035 | ≤0.035 | ≤0.25 | - | - |
| 55Si2Mn | 0.52-0.60 | 0.60-0.90 | 1.50-2.00 | ≤0.035 | ≤0.035 | ≤0.35 | - | - |
| 60Si2Mn | 0.56-0.64 | 0.60-0.90 | 1.50-2.00 | ≤0.035 | ≤0.035 | ≤0.35 | - | - |
| 60Si2MnA | 0.56-0.64 | 0.60-0.90 | 1.60-2.00 | ≤0.03 | ≤0.03 | ≤0.35 | - | - |
| 55CrMnA | 0.52-0.60 | 0.65-0.95 | 0.17-0.37 | ≤0.03 | ≤0.03 | 0.65-0.95 | - | - |
| 60CrMnA | 0.56-0.64 | 0.70-1.00 | 0.17-0.37 | ≤0.03 | ≤0.03 | 0.70-1.00 | - | - |
| 50CrVA | 0.46-0.54 | 0.50-0.80 | 0.17-0.37 | ≤0.03 | ≤0.03 | 0.80-1.10 | - | - |
| 60CrMnBA | 0.56-0.64 | 0.70-1.00 | 0.17-0.37 | ≤0.03 | ≤0.03 | 0.70-1.00 | - | - |
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Heavy Forging Press Capacity
Our heavy-duty forging presses support open-die forging and deformation of large-section forgings, including discs, shafts, blocks, and custom components. This capability enables us to meet the demanding forming requirements of heavy industrial applications.
Heat Treatment Capability
Heat treatment is a critical step in achieving the mechanical properties required for heavy-duty forgings. Our process capabilities meet the strength, toughness, and structural stability requirements for forged components used under demanding operating conditions.
Heavy Shaft Machining
We offer machining capabilities for large forged shafts and long cylindrical components, supporting both rough and finish machining. This capacity is suitable for stepped shafts, rotor shafts, rollers, and other heavy-duty forged shaft components.
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Our machining facilities are capable of handling large ring-shaped forgings and circular parts that require precise turning, face machining, boring, and contour control. This capability is suitable for industrial ring blanks, heavy-duty circular parts, and machined ring forgings.
Cylindrical Forging Machining
We offer machining solutions for heavy-duty cylindrical, hollow, and tubular forgings. This capability supports the machining of sleeves, cylinders, and other thick-walled forged components used in pressure vessels, rotating systems, and general industrial applications.
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Quality control is integrated into our production process through the inspection and testing of forged and machined parts. Our capabilities help verify the dimensional accuracy, condition, and quality consistency of industrial forgings prior to delivery.
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Finished forgings are properly protected and packaged to minimize the risk of damage during storage and transportation. Our packaging methods ensure the safe domestic delivery and export shipment of machined and high-value forged components.
