Material
JIS G3445 specifies the use of seamless carbon steel tubes for machinery parts. These tubes are made from carbon steel, which is an alloy composed primarily of iron and carbon. The carbon content in these tubes is typically between 0.05% and 0.32%. Carbon steel is known for its excellent mechanical properties and durability, making it suitable for various applications in machinery parts.
Specification
JIS G3445 specifies the following specifications for seamless carbon steel tubes used in machinery parts:
- Outer diameter: 6mm to 90mm
- Wall thickness: 1mm to 15mm
These specifications ensure that the tubes are suitable for different machinery parts and can withstand the required loads and pressure.
Chemical Composition
The chemical composition of JIS G3445 seamless carbon steel tubes is as follows:
| Element | Composition Range (%) |
| Carbon (C) | 0.22 - 0.32 |
| Silicon (Si) | 0.15 - 0.35 |
| Manganese (Mn) | 0.30 - 0.60 |
| Phosphorus (P) | 0.035 (max) |
| Sulfur (S) | 0.035 (max) |
These elements contribute to the overall properties and characteristics of the carbon steel tubes.
Mechanical Properties
The mechanical properties of JIS G3445 seamless carbon steel tubes are as follows:
| Property | Minimum Value |
| Tensile Strength (MPa) | 510 |
| Yield Strength (MPa) | 355 |
| Elongation (%) | 25 |
| Hardness (HB) | 150 (max) |
These mechanical properties ensure that the carbon steel tubes have sufficient strength, ductility, and hardness to withstand the demands of machinery parts.
Application
JIS G3445 seamless carbon steel tubes are widely used in various machinery parts due to their excellent properties. Some common applications include:
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Automotive components: These tubes are extensively used in the automotive industry for parts such as drive shafts, steering columns, and suspension systems.
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Construction machinery: Carbon steel tubes find application in construction machinery such as excavators, cranes, and loaders for structural components and hydraulic cylinders.
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Industrial equipment: Many industrial machines, including pumps, compressors, and conveyor systems, utilize seamless carbon steel tubes in their construction.
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Agricultural machinery: Implements like tillers, harvesters, and plows often incorporate carbon steel tubes for their strength and durability.
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General machinery: Various machinery parts like gears, shafts, and rollers rely on carbon steel tubes for their reliable performance.
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