AISI 4130 Seamless Tube
AISI 4130 Seamless Tube
AISI 4130 is a low-alloy steel known for its high strength, toughness, and good weldability. It is widely used in industries requiring durable and reliable materials, such as aerospace, oil and gas, automotive, and machinery manufacturing. AISI 4130 seamless tube is particularly valued for their uniformity, strength, and resistance to stress and corrosion.
AISI 4130 seamless tube is a versatile and reliable choice for industries requiring high-performance materials. Their combination of strength, toughness, weldability, and corrosion resistance makes them suitable for a wide range of demanding applications.
Delivery Condition: SR,BK, BK+S, GBK, NBK
ID Size : 20mm – 1500mm
Length: max 16m
Type: Seamless, Hot Rolled, Cold Rolled, Cold Drawn
Straightness: ≤ 0.5/1000
Tolerance EXT: ASTM A29
Tolerance INT: As request
Protection: Anti-rust oil on inside and outside surface, plastic caps in both ends.
Packing: Bundle with steel strip and PE sheet or Plywood case
Advantages
1. High Precision: The honing process ensures tight dimensional tolerances and a smooth surface finish.
2. High Strength and Toughness: AISI 4130 seamless tubes exhibit excellent tensile strength and toughness, making them suitable for high-stress applications.The alloying elements (chromium and molybdenum) enhance hardenability and strength.
3. Corrosion Resistance: The chromium content provides moderate corrosion resistance, making these tubes suitable for environments where oxidation and mild corrosion are concerns.
4. Seamless Construction: The seamless nature of the tube ensures uniformity and reliability in high-pressure applications.
5. Machinability: AISI 4130/30CrMo has good machinability in its annealed condition, allowing for easy fabrication into complex shapes.
6. Heat Treatability: AISI 4130/30CrMo seamless tubes can be heat-treated to achieve desired mechanical properties, such as increased hardness or improved fatigue resistance.
7. Versatility: Suitable for a wide range of applications, including hydraulic cylinders, pneumatic cylinders, and precision engineering components.
MATERIAL COMPOSITION:
Carbon (C): 0.28–0.33%
Manganese (Mn): 0.40–0.60%
Phosphorus (P): ≤ 0.035%
Sulfur (S): ≤ 0.040%
Molybdenum (Mo): 0.15–0.25%
Chromium (Cr): 0.80–1.10%
Iron (Fe): Balance
MECHANICAL Properties:
Tensile Strength: 670-930 MPa
Yield Strength: >460 MPa
Elongation: ~18%
Equivalent Names in Different Countries
| Country/Standard | Equivalent Designation |
|---|---|
| United States | AISI 4130, UNS G41300 |
| Europe (EN) | 25CrMo4 (1.7218) |
| Germany (DIN) | 25CrMo4 (1.7218) |
| United Kingdom (BS) | 708A25, 708M25 |
| France (AFNOR) | 25CD4 |
| Italy (UNI) | 25CrMo4 |
| Japan (JIS) | SCM430 |
| China (GB) | 30CrMo |
Delivery Conditions
| Designation | Symbol | Description |
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following the final cold forming and thus have a rather high resistance to deformation. |
| Cold finished (soft) | BKW | The final heat treatment is followed by cold drawing involving limited deformation.Appropriate further processing allows a certain degree of cold forming(e.g.bending,expanding). |
| Cold finished and stress-relieved | BKS | Heat treatment is applied following the last cold forming process.Subject to appropriate processing conditionsthe increase in the residual stresses involved enables both forming and machining to a certain degree. |
| Annealed | GBK | The last cold forming process is followed by annealing in a controlled atmosphere |
| Normalized | NBK | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
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