ASTM A519 GR.4130 Seamless Alloy Steel Tube
ASTM A519 GR.4130 Seamless Alloy Steel Tube is a seamless chromium-molybdenum alloy structural steel tube specified in the ASTM standard “Seamless Carbon and Alloy Steel Tubes for Machine Use” (A519/A519M). “4130” is the SAE/AISI steel grade (UNS G41300), specifically designed for manufacturing mechanical parts subjected to high stress and requiring good comprehensive mechanical properties.
Description
ASTM A519 GR.4130 Seamless Alloy Steel Tube, also known as AISI 4130 Seamless Pipe,is a seamless chromium-molybdenum alloy structural steel tube specified in the ASTM standard “Seamless Carbon and Alloy Steel Tubes for Machine Use” (A519/A519M). “4130” is the SAE/AISI steel grade (UNS G41300), specifically designed for manufacturing mechanical parts subjected to high stress and requiring good comprehensive mechanical properties.
ASTM A519 GR.4130 Seamless Alloy Steel Tube and ASTM A519 GR.4140 Seamless Alloy Steel Tube are both American standard chromium-molybdenum alloy steel tubes. The main difference lies in the strength, hardness and weldability caused by the carbon content. 4140 has higher strength but is more difficult to weld, while 4130 has better weldability and a better balance of toughness.
Characteristics of ASTM A519 GR.4130 Seamless Alloy Steel Tube:
1. Chemical Composition (%): C 0.28–0.33, Si 0.15–0.35, Mn 0.40–0.60, Cr 0.80–1.10, Mo 0.15–0.25; P≤0.04, S≤0.04. Cr+Mo synergistically improves corrosion resistance, high-temperature strength, and fatigue resistance.
2. Mechanical Properties (Typical Quenched and Tempered State): ASTM A519 GR.4130 Seamless Alloy Steel Tube has a tensile strength ≥930 MPa, yield strength ≥785 MPa, elongation after fracture ≥16%, and hardness ≤229 HB. Significant differences in properties exist between different delivery states (hot-rolled HR, stress-relieved SR, annealed A, normalized N)—SR exhibits the highest strength, while A shows the best plasticity.
3. Environmental Resistance: ASTM A519 GR.4130 Seamless Alloy Steel Tube outperforms ordinary carbon steel and is suitable for humid atmospheres and mildly acidic or alkaline media. Recommended operating temperature is ≤250℃ (high-pressure conduits) or ≤450℃ (fasteners).
Applications of ASTM A519 GR.4130 Seamless Alloy Steel Tube:
1. Aerospace
ASTM A519 GR.4130 Seamless Alloy Steel Tube is used in critical structural components such as aircraft landing gear support tubes, wing/fuselage frames, engine mounts, and hydraulic lines (e.g., Boeing 737 landing gear support tubes).
2. Automotive and Racing
Drive shafts, axle sleeves, suspension systems (shock absorber piston rods/guide rods), steering knuckles, roll cages, racing chassis/frames, and exhaust system components.
3. Mechanical Manufacturing and Hydraulic Systems
Shafts, gears, bolts, machine tool spindles/guideways/lead screws; hydraulic cylinder piston rods and cylinder barrels; high-pressure precision hydraulic hoses (cold-drawn/honed).
4. Oil & Gas & Chemical Industry
ASTM A519 GR.4130 Seamless Alloy Steel Tube is used for high-pressure pipelines in drilling and production equipment, gathering and transportation pipelines, reactor/heat exchanger components, and downhole tools (additional certification is required for some components that meet API 5CT/NACE sulfur resistance requirements); high-pressure conduits with operating temperatures generally ≤250℃.
5. Sports Equipment & Special Structures
ASTM A519 GR.4130 Seamless Alloy Steel Tube is used for high-end bicycle frames, golf clubs, racing car safety structures; long-span cable sleeves and lightweight support frames in construction (for applications requiring welding/lightweighting).
Standards and Classifications
| Alloy steel pipe
Standard & Mate |
GB5310-2013 Standard: 20G,25MnG, 15MoG,15CrMoG, 20MoG, 12CrMoG, 12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, 15CrMoG, 10CrMo910ASTM A209M/AS-209M Standard: A209T1/SA209 T1, A209 T1b/SA-209 T1b, A209T1a/SA209 T1a
ASTM A213M/ASME SA 213 M Standard: T2, T5, T9, T11, T12, T22, T23, T24, T91, T911, T92, T122 ASTM A333M/ASME SA-333/SA333M Standard: Gr1, Gr3, Gr4, Gr6, Gr7,Gr8, Gr9, Gr10, Gr11 ASTM A334M/ASME SA-334/SA334M Standard: Gr1, Gr3, Gr6, Gr7,Gr8, Gr9, Gr11 ASTM A335/ASME SA335 Standard: P1, P2, P5,P5b, P5c, P9, P11, P12,P21,P22,P23, P24, P91, P92 ASTM A519 Standard: 4118, 4130,4135,4137,4140 ASTM A691 Standard: GRADE 91, CM65, CM70, CM75, CMSH70, CMS75, CMSH80, ASTM A691 Standard GRADE 1/2 Cr, GRADE 1CR, GRADE 1 1/4 CR, 2 1/4 Cr, 3CR, 5CR, 9 CR DIN17175 Standard: ST35.8, ST45.8, 15Mo3, 13CrMo44, 10CrMo910, 14MoV63,12Cr1MoV EN10216-2 Standard: P195GH, P235GH, P265GH, 13CrMo4-5, 10CrMo9-10, 16Mo3, 10CrMo5-5, X10CrMoVNb9-1 JIS G3458 Standard: STPA12, STPA20, STPA22, STPA23, STPA24, STPA25, STPA26 JIS G3441 Standard: SCR420 TK,SCM415 TK, SCM418 TK, SCM420TK, SCM430TK, SCM435TK, SCM440TK. NF A49-213/215 Standard: TU15D3, TU13CD4-04, TU10CD910, TUZ10CD505, Alloy C276 BS3059 Standard: S1-622-440, S2-622-440, S1-622-490, S2-622-490, S1-629-470, S2-629-470, S2-629-590 BS3604Standard: HFS625 CFS625 BS3606Standard: CFS625 |
| Alloy steel pipe Size | O.D: 6-760mm W.T: 1-80mm Fixed Length: 5.8m, 6m, 11.8m, 12m, or random length as required. |
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