Metallic material
Innovation | Professionalism
Integrity | Efficiency
Metallic material
Innovation | Professionalism
Integrity | Efficiency
Spring steel made with Si-Mn alloy is the most commonly utilized type. A high concentration of silicon enhances the malleability of the steel, making it easier to process into parts for automobile springs. Conversely, a greater amount of manganese can increase the steel’s toughness and firmness. This type of steel is employed in the production of various elastic components, such as those found in winding devices.
Grade | Chemical composition% | |||||
| C | Si | Mn | S | P | Cr | |
50CrV4 | 0.47-0.55 | ≤0.40 | 0.70-1.10 | ≤0.015 | ≤0.025 | 0.90-1.20 |
65Mn | 0.62-0.70 | 0.17-0.37 | 0.90-1.20 | ≤0.015 | ≤0.025 | ≤0.30 |
SUP6 | 0.56-0.64 | 1.5-1.8 | 0.7-1.0 | ≤0.015 | ≤0.025 | – |
SUP10 | 0.47-0.55 | 0.15-0.35 | 0.65-0.95 | ≤0.015 | ≤0.025 | – |
60Si2MnA | 0.56-0.64 | 1.60-2.00 | 0.70-1.00 | ≤0.015 | ≤0.025 | – |
C67S | 0.65-0.72 | 0.15-0.35 | 0.60-0.90 | ≤0.015 | ≤0.025 | – |
Grade | Mechanical properties | ||
| Hot-rolled hardnessHV | Annealed hardnessHV | Quenching hardnessHRC | |
50CrV4 | ≤350 | ≤180 | ≥54 |
65Mn | ≤360 | ≤180 | ≥56 |
SUP6 | ≤360 | ≤180 | ≥56 |
SUP10 | ≤350 | ≤180 | ≥54 |
60Si2MnA | ≤360 | ≤180 | ≥56 |
C67S | ≤350 | ≤180 | ≥56 |
The manufacturing process for BT steels involves killing the steel in an oxygen converter, followed by refining and continuous casting. The resulting slabs are reheated and rolled into coils using the TMCP rolling process. Upon inspection, the BT steels are available for delivery in either coil form or as sheets that have undergone powerful leveling and cutting. The steels can be delivered in various conditions, including TMCP, quenched, annealed, quenched and tempered, etc. Additionally, processing and distribution services are available to meet customers’ specific requirements, such as steel plates delivered with pretreatment like blasting.
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