Carbon steel bolts are fasteners made primarily from carbon steel, an alloy consisting of iron and carbon with small amounts of other elements. They are among the most widely used bolts in construction, manufacturing, automotive, and industrial applications because of their high strength, affordability, and versatility.
The carbon content in these bolts typically ranges from 0.05% to 2.0%, and different carbon levels produce different grades of bolts with varying mechanical properties.
Iron (Fe): Main component providing the base metal structure
Carbon (C): Increases hardness and tensile strength as carbon content rises
Manganese (Mn): Improves toughness and wear resistance
Silicon (Si) & Sulfur (S): Present in small amounts for improved machinability
| Property | Performance Level |
|---|---|
| Strength | Moderate to very high, depending on grade |
| Hardness | Increases with carbon content |
| Ductility | Decreases as carbon content rises |
| Corrosion Resistance | Low (requires coating or galvanization) |
Carbon content: 0.05%–0.3%
Features: Ductile, weldable, low strength
Applications: General-purpose fastening, non-critical structures
Carbon content: 0.3%–0.6%
Features: Higher strength, better wear resistance, can be heat-treated
Applications: Automotive components, machinery
Carbon content: 0.6%–1.0%
Features: Very hard, strong, lower ductility
Applications: Heavy-duty industrial equipment, high-strength joints
We are a custom bolt manufacturer specializing in carbon steel and bolts of various materials and types. If you have any questions, please contact us.
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