31CrMo12 1.8515 Nitriding Steel Forgings for Mining, Wind Energy Machinery Gear Extruder Shafts, Cylinders, Rings Spindles

Product Description

Jiangsu Liangyi is an ISO 9001:2015-certified alloy-steel forging manufacturer in China supplying 31CrMo12 / W.Nr. 1.8515 open-die forgings, seamless rolled rings (OD to 5,000 mm) and gear shafts to mining, wind-energy, oil & gas, automotive and machinery projects in India and worldwide, to EN 10085 / EN 10083-3.

Why 31CrMo12 / 1.8515 for Indian mining, wind-energy and machinery projects

31CrMo12 is a high-chromium Al-free Cr-Mo nitriding steel that develops a nitrided surface to 800 HV over a tough quenched-and-tempered core, with creep and impact resistance suited to large cross-sections. For India's mining, wind-energy, oil & gas and plastics/extrusion sectors, 1.8515 suits heavy gears, extruder screws and barrels, cylinders, spindles and shafts.

Documented capability

Mining: heavy gears, pinion shafts, spindles, rings, bearing races.

Wind energy: gear/pinion shafts, gear rings, slewing races.

Oil & gas: spindles, shafts, cylinders, high-wear parts.

Plastics/extrusion: extruder screws and barrels, cylinders, liners.

Product range for Indian buyers

Round/square/flat/rectangular bars; gear/pinion shafts, spindles, extruder screws/barrels, connecting rods; seamless rolled rings, gear rings, bearing races (OD to 5,000 mm); cylinders, sleeves, bushes, housings, hollow bars; thread gauges, guides; custom large-section forgings.

Material data

Chemistry (EN 10085, wt%): C 0.280.35, Si 0.40, Mn 0.400.70, Cr 2.803.30, Mo 0.300.50 (Al-free). Q&T core + nitrided surface to 800 HV; nitride 480570 C; good strength to 600 C. Not for welding.

Standards & quality

Manufactured to EN 10085 / EN 10083-3; 100% ultrasonic testing; EN 10204-3.1 / 3.2 MTRs; full chemistry and mechanical testing per heat. 31CrMo12 and W.Nr. 1.8515 are the same grade; no exact AISI equivalent.

Commercial & logistics

Lead time by project; FOB Shanghai / CIF to Nhava Sheva, Mundra, Chennai, Kandla, Visakhapatnam.

Enquire with Jiangsu Liangyi: sales@jnmtforgedparts.com +86-13585067993 Jiangyin, Jiangsu, China.

Jiangsu Liangyi is an independent manufacturer; grade names indicate the material supplied.