Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
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20CrMnTi Heavy Steel Forgings For Shipbuilding Intermediate Shaft. Our 20CrMnTi heavy steel forgings for shipbuilding intermediate shafts are engineered to meet the stringent demands of marine applications. The 20CrMnTi alloy steel, renowned for its excellent hardenability, high core strength, and wear - resistant surface after carburizing and quenching, ensures these forgings can endure the harsh marine environment, heavy loads, and continuous rotational stresses during long - distance voyages.
Product Advantages
Application Areas
These open die steel forgings are specifically engineered for marine propulsion and steering systems, where they are subjected to continuous torsional loads, saltwater exposure, and long-term fatigue cycles. Their grain-refined structure ensures superior resistance to seawater-induced corrosion, impact shocks, and rotational stress, making them ideal for rudder stocks, propeller shafts, and thrust shafts in heavy-duty vessel applications.
| Item | 20CrMnTi Heavy Steel Forgings For Shipbuilding Intermediate Shaft |
|---|---|
| Materials | Marine-grade steels: 42CrMo, 18CrNiMo7-6, 20CrNi2Mo, 4340, 35CrMo, 1.7225, 20CrMnTi, 20CrMnMo. |
| Forging Equipment | 5T / 8T / 12T hydraulic hammers with large-section open die capability. |
| Production Process | Forging → Heat Treatment → Rough Machining → Dimensional & NDT Inspection |
| Forging Ratio | ≥ 3.0 – Ensures refined grain structure, high tensile strength, and structural reliability in marine operating conditions |
| Application | Custom-designed for propeller shafts, rudder stocks, marine drive shafts, thrust flanges, and steering gear shafts used in ships and offshore vessels |
| Delivery Condition | - N+T (Normalized + Tempered): for pre-machined parts |
| Inspection & Testing | - Chemical Composition: Optical Emission Spectrometer - Mechanical Properties: Tensile, Charpy Impact, Hardness Tests - NDT: UT, MT - Dimensional Checks: Precision micrometers, indicators |
| Marine-Certified Services | Services include forging, heat treatment, CNC machining, packaging, and global marine logistics. |
Process flow:
raw material inspection → unloading → inspection → preheating → forging → heat treatment → inspection → rough machining → non-destructive testing → inspection → packaging → delivery.