4130 Alloy Hot Rolled Steel Pipe
Cross-section shape: round
Dimensions: Outer diameter: 21.3 mm - 660 mm, can be customized according to customer requirements
Wall thickness: 0.5 mm - 20 mm, can be customized according to customer requirements
Length: 1 m - 12 m, can be customized according to customer requirements
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
- Send E-mail: ss@gneesteel.com
- Tel: +8615824687445
GNEE 4130 Hot Rolled Steel Pipe introduce
4130 Alloy Hot Rolled Pipe
4130 Hot-Rolled Chromoly Steel Tube is a chromium-molybdenum alloy steel tube produced by hot rolling process, with excellent comprehensive mechanical properties and good processing adaptability. The tube is made of 4130 chromium-molybdenum steel (C 0.28-0.33%, Cr 0.8-1.1%, Mo 0.15-0.25%) as raw material, rolled at high temperature, retaining the uniform structure and good mechanical properties of the material. The hot rolling process makes the tube have high production efficiency and economy, suitable for mass production, and the typical specification range is 20-500mm outer diameter, 2.5-50mm wall thickness, and up to 18 meters in length.
In terms of mechanical properties, after quenching and tempering heat treatment, the tensile strength of 4130 hot-rolled tube can reach 670-850MPa, the yield strength is 435-700MPa, the elongation is 12-20%, and the impact energy is not less than 40J at 20°C, while maintaining a density of 7.85g/cm³. Its chromium-molybdenum alloy composition provides good hardenability and fatigue resistance, and is particularly suitable for working conditions with alternating loads. The surface of the hot-rolled tube is usually covered with oxide scale (Ra 3.2-12.5μm), and the surface quality can be improved by subsequent processing such as sandblasting and turning.
4130 hot-rolled tube is widely used in heavy industrial fields such as oil and gas (drill collars, casing), engineering machinery (crane booms, excavator structures), energy and power (boiler components, pressure pipelines), etc. Its advantages are: 1) High cost performance, 30-50% lower cost than cold-rolled tubes; 2) Good welding performance, suitable for large structural parts manufacturing; 3) Excellent thick-wall forming ability, can produce pipes with a wall thickness of up to 50mm. It should be noted that stress relief annealing must be performed after welding, and preheating process is recommended for thick-walled tube processing to avoid cracking. With its excellent strength-toughness balance and scale production advantages, 4130 hot-rolled tube has become one of the preferred materials for key components of heavy-duty industrial equipment.
GNEE 4130 Hot Rolled Pipe Specification Sheet
4130 Hot-Rolled Chromoly Steel Tube Specifications
| Property Category | Technical Parameters / Description |
|---|---|
| Dimensions | OD: 20-500mm (standard), up to 800mm (custom) Wall Thickness: 2.5-50mm Length: 6-12m (standard), up to 18m (custom) |
| Standards | - ASTM A519 (seamless mechanical tubing) - EN 10297 (EU standard) - GB/T 8162 (China standard) - AMS 6371 (aerospace) |
| Surface Treatment | - Black oxide (basic protection) - Shot blasted (surface cleaning) - Peeled/turned (improved finish) - Bare (as-rolled) |
| Hardness | - As-rolled: 180-230 HB - Normalized: 200-250 HB - Q&T: 25-32 HRC |
| Density | 7.85 g/cm³ |
| Material Composition | Chemical Composition (%): - C: 0.28-0.33 - Cr: 0.80-1.10 - Mo: 0.15-0.25 - Mn: 0.40-0.60 - Si: 0.15-0.35 - P/S: ≤0.030 |
| Mechanical Properties | After Q&T: - Tensile: 670-850 MPa - Yield: 435-700 MPa - Elongation: 12-20% - Impact: 40J@20°C |
| Primary Applications | - Oil & gas drill collars - Heavy machinery frames - Pressure vessels - Power plant components - Construction equipment |
4130 Pipe Pipe chemical composition
| Element | Content (%) |
|---|---|
| Iron, Fe | 97.03 – 98.22 |
| Chromium, Cr | 0.80 – 1.10 |
| Manganese, Mn | 0.40 – 0.60 |
| Carbon, C | 0.280 – 0.330 |
| Silicon, Si | 0.15 – 0.30 |
| Molybdenum, Mo | 0.15 – 0.25 |
| Sulfur, S | 0.040 |
| Phosphorous, P | 0.035 |
GNEE 4130 Rolled Pipe Schedule
4130 Hot-Rolled Chromoly Steel Tube Standard Size Chart
1. Common Specifications by Outer Diameter (OD)
| OD (mm) | Common Wall Thickness (mm) | Typical Applications |
|---|---|---|
| 20-50 | 2.5, 3.0, 4.0, 5.0 | Hydraulic cylinders, structural components, pipelines |
| 50-100 | 3.0, 4.0, 5.0, 6.0, 8.0 | Construction machinery booms, oil drill pipes, pressure vessels |
| 100-200 | 5.0, 6.0, 8.0, 10.0 | Power plant boiler tubes, chemical equipment, ship structures |
| 200-500 | 8.0, 10.0, 12.0, 15.0 | Large pressure vessels, mining machinery, bridge supports |
2. Wall Thickness (WT) Ranges
| WT Range (mm) | Applicable OD Range (mm) | Process Characteristics |
|---|---|---|
| 2.5-5.0 | 20-150 | Standard hot-rolling process |
| 5.0-10.0 | 50-300 | Requires controlled rolling temperature |
| 10.0-20.0 | 100-400 | Multi-pass rolling + normalization recommended |
| 20.0-50.0 | 200-500 | Special hot-rolling + heat treatment required |
3. Standard Lengths & Tolerances
| Industry | Standard Length (m) | OD Tolerance | WT Tolerance |
|---|---|---|---|
| Oil & Gas | 6.0, 9.0, 12.0 | ±0.75% | +12.5%/-10% |
| Heavy Machinery | 6.0, 8.0, 10.0 | ±1.0% | +15%/-10% |
| Power Equipment | 6.0, 12.0 | ±0.5% | +10%/-7.5% |
| Custom Structures | 3.0-18.0 | As per drawing | As per drawing |
GNEE Group Factory Environment
GNEE Group 4130 Steel Pipe Factory Environment
GNEE Group 4130 Alloy Pipe Packaging
GNEE Group 4130 Hot Rolled Pipe Packaging
GNEE Group Testing
GNEE Group 4130 Pipe Testing
FAQ
1. What is AISI 4130?
AISI 4130 is a chromoly steel, also known as chrome moly steel. It's a medium-carbon, low-alloy steel popular for its balance of strength, toughness, and machinability.
2. Is chrome-molybdenum steel better than steel?
What distinguishes chrome-molybdenum steel from other types of steel is its higher tensile strength. This means it can withstand greater forces without breaking or deforming. It also has better corrosion resistance, making it ideal for applications exposed to harsh environments or moisture.
3. Will 4130 chrome-molybdenum steel rust?
Both 4140 and 4130 steels are low-alloy steels that have excellent strength, toughness, and corrosion resistance.
4. Is 4130 a carbon steel?
4130 carbon steel is a low-carbon steel with a carbon content of approximately 0.3%. 4130 is also an alloy steel with chromium and molybdenum as strengthening agents. This steel is easy to weld and can be heat treated more easily than other mild steels.
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