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GB/T 3094 Special Shaped Seamless Steel Pipe for Industrial Machinery
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Instruction
GB/T 3094 Special Shaped Seamless Steel Pipe For Industrial Machinery
Material
The GB/T 3094 standard covers special shaped seamless steel pipes used in industrial machinery. These pipes are made from various materials, including carbon structural steel, alloy structural steel, and stainless steel. The specific material grades and chemical compositions are outlined below.
Specification and Chemical Composition
The following table provides an overview of the specifications and chemical compositions of the materials used in special shaped seamless steel pipes according to the GB/T 3094 standard:
| Material Grade | Chemical Composition |
| Carbon Structural Steel | C: 0.08-0.17% Si: 0.17-0.37% Mn: 0.35-0.65% P: ≤0.035% S: ≤0.035% |
| Alloy Structural Steel | C: 0.20-0.25% Si: 0.15-0.30% Mn: 0.70-1.00% P: ≤0.035% S: ≤0.035% Cr: 0.80-1.10% Ni: ≤0.30% Cu: ≤0.30% Mo: 0.15-0.25% |
| Stainless Steel | C: ≤0.08% Si: ≤1.00% Mn: ≤2.00% P: ≤0.035% S: ≤0.030% Cr: 16.00-18.00% Ni: 10.00-14.00% Others: - |
Mechanical Properties and Steel Grade
The GB/T 3094 standard specifies the minimum mechanical properties that special shaped seamless steel pipes should possess. The mechanical properties vary based on the material grade. The following table presents the mechanical properties and corresponding steel grades:
| Material Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| Carbon Structural Steel | ≥410 | ≥245 | ≥25 | - |
| Alloy Structural Steel | ≥520 | ≥275 | ≥20 | - |
| Stainless Steel | ≥520 | ≥205 | ≥40 | ≤207 |
Application
Special shaped seamless steel pipes manufactured according to the GB/T 3094 standard find application in industrial machinery. These pipes are designed with non-circular cross-sections, such as oval, rectangular, square, or other customized shapes, to meet specific requirements in various industries. They are commonly utilized in the manufacturing of machinery components, structural supports, conveyor systems, and other industrial applications.
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