Facing challenges such as frequent bending deformation, internal cracks, and long delivery cycles of long shaft forgings under heavy loads, Jianing Forging uses mature, full-process temperature-controlled forging technology and precise heat treatment technology to provide heavy equipment with shaft forgings with relatively high strength and high straightness, helping to operate stably over long periods in harsh environments while significantly shortening your procurement and changeover cycles.
Facing challenges such as frequent bending deformation, internal cracks, and long delivery cycles of long shaft forgings under heavy loads, Jianing Forging uses mature, full-process temperature-controlled forging technology and precise heat treatment technology to provide heavy equipment with shaft forgings with relatively high strength and high straightness, helping to operate stably over long periods in harsh environments while significantly shortening your procurement and changeover cycles.
Long-shaft forgings are the core components developed by Jianing Forging for heavy-duty application scenarios such as construction machinery, mining equipment, ship power, and petrochemicals. The products are made from high-quality alloy steel or carbon steel as raw materials, formed through open-die forging or die forging, and are equipped with processes such as normalizing, quenching and tempering, and flaw detection, achieving full dimensional accuracy and controllable mechanical properties from raw materials to finished products. Machinable diameters range from 100 mm to 1200 mm, with lengths up to 12 meters, meeting various non-standard customization needs for length-to-diameter ratios.
Using multi-heat forging and tempering processes, internal stress is eliminated and grain refinement is achieved, helping the shaft core to be dense and fatigue resistance stable.
Before leaving the factory, ultrasonic testing (GB/T 6402 or EN 10228 standards) helps prevent defects such as cracks, slag inclusions, and shrinkage cavities.
Available in rough, semi-finish, or finishing processing modes, with straightness controlled within 0.5 mm/m and surface roughness Ra≤3.2 μm.
Supports multiple heat treatment solutions such as normalizing, quenching and tempering, quenching, carburizing, and nitriding, meeting different hardness and wear resistance requirements.
Structural forging such as steps, flanges, and threads can be carried out according to customer drawings, reducing subsequent machining allowance and improving material utilization.
Long shaft forgings are custom-made according to drawings, and their prices are affected by material grade, forging ratio, heat treatment requirements, and final delivery status. Jianing Forging offers free technical evaluation and targeted quotation plans. Please contact our sales engineers for specific cost calculations.
Delivery of standard specification products must be completed within 30 working days from contract signing, and delivery times for large non-standard parts shall be negotiated between both parties.
Each batch provides raw material quality certificates, heat treatment curve charts, and third-party non-destructive testing reports.
Products that suffer defects caused by forging processes under normal usage conditions can be provided with 12 months of quality assurance.
Supports 24-hour online technical response, with engineers arranging on-site assembly and adjustment when necessary.
| Parameter items | Specification range |
|---|---|
| Maximum forging diameter | 1200 mm |
| Maximum forging length | 12 000 mm |
| Common materials | 35#, 45#, 40Cr, 42CrMo, 35CrMo, 40CrNiMo, etc |
| Forging method | Open die forging / tire die forging |
| Heat treatment state | Normalizing, quenching and tempering, quenching + tempering, carburizing, nitriding |
| Detection capability | UT, MT, PT, mechanical properties, chemical composition |
| Surface treatment | Rough turning / semi-precision turning / grinding / rust prevention and oiling |
