34CrMo4 is an alloy structural steel with high endurance and creep strength at high temperatures. It's mainly used for cylinder manufacturing or structural parts working under high loads such as transmission parts of vehicles and engines; turbine-generator rotor, spindle, heavy load drive shaft, large section parts, locomotive traction gear, supercharger transmission gear, rear shaft, connecting rod and spring clamp with great load, can also be used for the oil drilling pipe joints and fishing tools below 2000m. However, its poor weldability requires preheating before welding, heat treatment after welding and stress elimination. It is generally used after quenching and tempering, and used after high and medium frequency surface quenching or quenching and low and medium temperature tempering.
Wall thickness：4-18 mm
Straightness: Deviation 2 mm/m max.
Delivery allowance: +/- 10%
|Length tolerance||WT tolerance||O.D. tolerance|
|0/+100mm for a total length||+0,9mm||-1 / +1%|
Mechanical Values :
Tensile strength Rm
Yield strength YS
UT protocol according to ISO 10893-10
Non-destructive control: flux leakage acc. To EN 10246-4
Internal transversal defects- level severity F3
External transversal defects- level severity F2
flux leakage acc. To EN 10246-5
Internal longitudinal defects: level severity F3
External longitudinal defects: level severity F2
Sizes control: US-wall thickness measurement acc. To EN 10246-13
Mechanical tests will be done on samples at simulated heat treatment
conditions oil quenching at 880°C /30 minutes and tempering at 650°C /30 minutes.
Mill Test Certificate: EN 10204 3.1
Inspection: Bureau Veritas Acceptable
Packing: In bundles 2.5MT max, pipe ends with protection caps
Protection: No outside/inside coating, protecting material required
34CrMo4 is the alloy material commonly used in EN 10297-1 standard and the heat treatment is mainly normalizing or annealing. Worldiron&steel supply 34CrMo4 seamless steel pipes in various sizes and specifications even the size hard to find. We provide a high-pressure steel pipe and steel plate for many industries. If you want to get the price, please contact with us by: email@example.com or call us now！