Products Description
JIS G3472 STAM290GA STAM340G Carbon Welded Steel Pipe for Automobile
Advantages of STAM290GA & STAM340G Carbon Welded Steel Pipes in Automobiles
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STAM290GA and STAM340G carbon welded steel tubes offer high mechanical strength while remaining lightweight, which can reduce vehicle weight, improve fuel efficiency, and handling.
- STAM290GA is highly formable for complex bent or stamped parts, while STAM340G has high tensile strength, making it ideal for parts such as crash boxes, side members, and bumper reinforcements.
- STAM290GA carbon welded steel tubes are typically galvanized for long-term corrosion resistance, making them ideal for underbody or exposed structural parts in harsh environments (road salt, moisture).
Applications of STAM290GA STAM340G Carbon Welded Steel Pipe for Automobile
- Automotive structural components: cross members, side impact beams
- Seating structures: seat frames and mounting rails, reclining mechanisms and support tubes
- Suspension and chassis systems: suspension arms and links, stabilizer bar housings and support tubes
- Steering and control components: steering column tubes
- Exhaust and underbody components: frame rail brackets and underbody brackets
Chemical Composition
| Element | Carbon | Silicon | Manganese | Phosphorus | Sulfur |
| STAM290GA (%) | 0.23-0.30 | 0.15-0.35 | 0.30-0.90 | 0.040 max | 0.040 max |
| STAM340G (%) | 0.23-0.30 | 0.15-0.35 | 0.30-0.90 | 0.040 max | 0.040 max |
Mechanical Properties
| Property | Tensile Strength | Yield Strength | Elongation | Hardness (HRB) |
| STAM290GA | 290 MPa min | 190 MPa min | 35% min | 50 max |
| STAM340G | 340 MPa min | 245 MPa min | 30% min | 55 max |
Possible Alternative Grades
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STKM11A: Low carbon steel pipe for general machinery, low strength, good formability.
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STKM13C: Medium carbon steel for automotive parts, comparable strength, used for shock absorbers/brakes.
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STAM390G: High strength automotive structural steel, higher strength than STAM340G.
Packaging
Once the pipes have passed all inspections and tests, they are ready for packaging. They are usually packaged in bales wrapped in plastic. The pipes can be bundled and ready for delivery according to customer requirements, ensuring that the pipes are protected during transportation and prevent surface damage.
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