Chromoly Steel Tubing (4130 / 4140)
Chromoly steel tubing is seamless chromium-molybdenum alloy tube, most commonly 4130 (AISI 4130 / 30CrMo) and 4140 (42CrMo). It combines high tensile strength with good weldability, which makes it the standard choice for motorsport, aircraft and high-stress mechanical parts.
Price: quoted per specification and confirmed at the time of order.
Specifications
- Construction: seamless, cold drawn, normalized
- Grades: 4130 (30CrMo), 4140 (42CrMo)
- Standard: ASTM A519, AMS-T-6736
- Size: OD 10–200 mm, wall 1–12 mm
- Length: random or cut to length
- Documents: mill test certificate, EN 10204 3.1
Applications
- Roll cages and race car chassis
- Aircraft structures and landing gear
- Bicycle and motorcycle frames
- Suspension arms and drive shafts
- Rifle barrels and hydraulic fittings
4130 vs 4140
4130 is the more weldable, general-purpose chromoly; 4140 has higher carbon and hardens deeper, used where more strength is needed. Tell us the drawing and we will quote the right grade.
Related: seamless steel tube and DOM tubing.
Send your size list or drawing
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