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Compliant with ASTM A106 Grade B and ASTM A519, this high-strength machinery industrial tube is designed for heavy-duty mechanical applications where reliability and performance are non-negotiable.
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Crafted from 4130 alloy steel (quenched and tempered), it delivers exceptional torsional strength and wear resistance—making it suitable for machine tool components, hydraulic cylinders, and industrial equipment frames. Available in seamless construction with diameters from 25mm to 219mm and wall thicknesses from 3.0mm to 12.7mm, it operates reliably in temperatures ranging from -40℃ to 400℃ and pressures up to 25 MPa.
Mechanical Strength: 4130 alloy steel (0.28–0.33% carbon, 0.80–1.10% chromium, 0.15–0.25% molybdenum) offers tensile strength ≥ 760 MPa, yield strength ≥ 655 MPa, and impact toughness ≥ 60 J at -40℃ (per ASTM A370). This provides 2.5x the torsional strength of 1020 carbon steel, resisting twisting forces in rotating machinery.
Pressure and Temperature Resistance: Withstands working pressures up to 25 MPa (burst pressure ≥ 75 MPa) and continuous operating temperatures from -40℃ to 400℃. Ideal for hydraulic systems (transmitting hydraulic oil at 20 MPa) and high-temperature machinery (e.g., oven conveyor rollers at 350℃).
Dimensional Precision: Outer diameter tolerance of ±0.4mm and wall thickness tolerance of ±3%, measured via coordinate measuring machine (CMM) for accuracy. The seamless construction ensures uniform wall thickness, preventing pressure concentration in hydraulic applications.
Surface and Processing: Cold-drawn surface finish (Ra ≤ 1.6μm) reduces friction in sliding components (e.g., piston rods), while hot-finished options (Ra ≤ 6.3μm) are cost-effective for structural uses. Easily machined (drilling, threading, milling) with a machinability rating of 70% (vs. 100% for 1215 leaded steel).
Machine Tools: Used in lathe beds, milling machine columns, and drill press frames for their rigidity. The tube’s stability reduces vibration during high-speed machining (up to 5000 RPM), improving part precision by 15–20%.
Hydraulic Systems: Ideal for hydraulic cylinders, piston rods, and hydraulic lines in construction machinery (e.g., excavators, loaders). The seamless construction prevents fluid leakage, while the high strength handles pressure spikes up to 30 MPa.
Industrial Conveyors: Used in conveyor rollers and frames for heavy-duty material handling (e.g., moving steel sheets, concrete blocks). The tube’s load capacity (up to 2000 kg per meter) and wear resistance ensure reliable operation in manufacturing facilities.
Q: What certifications do you provide, and is it compliant with international standards?
A: Each batch comes with a Certificate of Compliance (CoC) and material test report (MTR) including chemical composition and mechanical properties. It complies with ASTM A106 Grade B, ASTM A519, and ISO 9001:2015. For export to the EU, we offer CE certification upon request.
Q: Can it be customized with internal honing for hydraulic cylinder applications?
A: Yes—internal honing is available with a surface finish of Ra ≤ 0.4μm and dimensional tolerance of ±0.05mm for hydraulic cylinders. Honing adds 5–7 working days to the lead time and costs 15–20% above standard pricing, depending on the tube size.
Q: What is the maximum length available, and how is it shipped to prevent damage?
A: Standard lengths are 6m–12m (in-stock); custom lengths up to 18m are available (14–21 working days). All tubes are shipped with plastic end caps (to prevent debris entry) and wrapped in protective foam, with steel crates for lengths over 12m to avoid bending during transit.
Crafted from 4130 alloy steel (quenched and tempered), it delivers exceptional torsional strength and wear resistance—making it suitable for machine tool components, hydraulic cylinders, and industrial equipment frames. Available in seamless construction with diameters from 25mm to 219mm and wall thicknesses from 3.0mm to 12.7mm, it operates reliably in temperatures ranging from -40℃ to 400℃ and pressures up to 25 MPa.
Mechanical Strength: 4130 alloy steel (0.28–0.33% carbon, 0.80–1.10% chromium, 0.15–0.25% molybdenum) offers tensile strength ≥ 760 MPa, yield strength ≥ 655 MPa, and impact toughness ≥ 60 J at -40℃ (per ASTM A370). This provides 2.5x the torsional strength of 1020 carbon steel, resisting twisting forces in rotating machinery.
Pressure and Temperature Resistance: Withstands working pressures up to 25 MPa (burst pressure ≥ 75 MPa) and continuous operating temperatures from -40℃ to 400℃. Ideal for hydraulic systems (transmitting hydraulic oil at 20 MPa) and high-temperature machinery (e.g., oven conveyor rollers at 350℃).
Dimensional Precision: Outer diameter tolerance of ±0.4mm and wall thickness tolerance of ±3%, measured via coordinate measuring machine (CMM) for accuracy. The seamless construction ensures uniform wall thickness, preventing pressure concentration in hydraulic applications.
Surface and Processing: Cold-drawn surface finish (Ra ≤ 1.6μm) reduces friction in sliding components (e.g., piston rods), while hot-finished options (Ra ≤ 6.3μm) are cost-effective for structural uses. Easily machined (drilling, threading, milling) with a machinability rating of 70% (vs. 100% for 1215 leaded steel).
Machine Tools: Used in lathe beds, milling machine columns, and drill press frames for their rigidity. The tube’s stability reduces vibration during high-speed machining (up to 5000 RPM), improving part precision by 15–20%.
Hydraulic Systems: Ideal for hydraulic cylinders, piston rods, and hydraulic lines in construction machinery (e.g., excavators, loaders). The seamless construction prevents fluid leakage, while the high strength handles pressure spikes up to 30 MPa.
Industrial Conveyors: Used in conveyor rollers and frames for heavy-duty material handling (e.g., moving steel sheets, concrete blocks). The tube’s load capacity (up to 2000 kg per meter) and wear resistance ensure reliable operation in manufacturing facilities.
Q: What certifications do you provide, and is it compliant with international standards?
A: Each batch comes with a Certificate of Compliance (CoC) and material test report (MTR) including chemical composition and mechanical properties. It complies with ASTM A106 Grade B, ASTM A519, and ISO 9001:2015. For export to the EU, we offer CE certification upon request.
Q: Can it be customized with internal honing for hydraulic cylinder applications?
A: Yes—internal honing is available with a surface finish of Ra ≤ 0.4μm and dimensional tolerance of ±0.05mm for hydraulic cylinders. Honing adds 5–7 working days to the lead time and costs 15–20% above standard pricing, depending on the tube size.
Q: What is the maximum length available, and how is it shipped to prevent damage?
A: Standard lengths are 6m–12m (in-stock); custom lengths up to 18m are available (14–21 working days). All tubes are shipped with plastic end caps (to prevent debris entry) and wrapped in protective foam, with steel crates for lengths over 12m to avoid bending during transit.
