STKM 11A Carbon Steel Seamless Tube Structural Steel Pipe For Machine Structure
STKM 11A Carbon Steel Seamless Tube Structural Steel Pipe For Machine Structure
Carbon steel seamless tubes, such as the STKM 11A, are pivotal in various machine structural applications. Known for their robustness and versatility, these tubes cater to industries requiring high durability and resistance.
Material Specification
The STKM 11A grade is a well-regarded material for seamless tubes in machine structures. It presents an excellent balance of strength and ductility, specifically crafted to withstand significant stress and pressures associated with machine operations. The precise fabrication process of these seamless pipes ensures uniform strength across the tube's length.
Key Features
- High Strength: Offers exceptional load-bearing capabilities.
- Durability: Excellent fatigue strength, suitable for long-term use.
- Corrosion Resistance: Moderately resistant to corrosion, especially when surface treated.
- Weldability: Can be easily welded, making it suitable for complex structural applications.
- Machinability: Easy to machine, allowing for custom applications.
Chemical Composition
The chemical composition of STKM 11A determines its mechanical properties and suitability for machine structure applications.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.25 max |
| Manganese (Mn) | 0.30 - 0.90 |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.040 max |
| Silicon (Si) | 0.35 max |
Mechanical Properties
The mechanical properties outline the performance capability of STKM 11A under different loads and conditions.
| Property | Specification |
|---|---|
| Tensile Strength | 370 - 520 MPa |
| Yield Strength | ≥ 275 MPa |
| Elongation | ≥ 30% |
Similar Standards and Steel Grades
Equivalence to various international standards ensures global compatibility and availability of STKM 11A.
- ASTM: Recognized as A513 in ASTM standards.
- EN: Comparable to E235 in EN standards.
- GOST: Similar to ГOST 8733 in Russian standards.
- JIS: Precisely defined as STKM 11A in JIS standards.
- GB: Matches GB/T 699 in Chinese specifications.
Applications
Applications for STKM 11A cover a broad spectrum due to its structural integrity and versatility:
- Automotive Structures: Frame and body components.
- Industrial Machinery: Components requiring high strength, like hydraulic cylinders.
- Construction: Support structures where strength and weight savings are crucial.
- Agricultural Equipment: Framework and supports in heavy-use environments.
- General Engineering: Suitable for custom machine parts needing specific dimensions and performance criteria.
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