23CrNiMo7-4-7 W.Nr. 1.6749 Cr Ni Mo High Hardenability Steel Forgings for Turbine Rotor Shafts and Heavy Rotating Parts Shafts, Rings and Bars Jiangsu Liangyi

Product Description

Jiangsu Liangyi is an ISO 9001:2015-certified forging manufacturer in China supplying 23CrNiMo7-4-7 / W.Nr. 1.6749 open-die forgings, turbine rotor shafts, seamless rolled rings and bars to turbine, power-generation and heavy-machinery projects in India and worldwide, to EN 10250-3.

Why 23CrNiMo7-4-7 / 1.6749 for Indian rotor-shaft projects

23CrNiMo7-4-7 is a Cr-Ni-Mo high-hardenability Q+T steel whose Cr-Ni-Mo triad suppresses pearlite during quenching for full martensitic transformation beyond 400 mm ruling section deeper through-hardening than 42CrMo4 with high fatigue resistance (endurance limit ~430470 MPa) and temper-embrittlement resistance. For India's turbine, power-generation and heavy-machinery sectors, 1.6749 suits turbine rotor shafts, heavy rotating components, large gears and gear shafts.

Documented capability

Turbines/power: turbine rotor shafts, generator/turbomachinery rotating components.

Heavy machinery/drivetrain: large gears, pinions, gear shafts, couplings, heavy shafting.

Rings/rotating parts: seamless rolled rings, discs, hubs, sleeves.

General: bars, custom forgings requiring deep through-hardening.

Product range for Indian buyers

Forged turbine rotor shafts and heavily loaded shafts; generator and turbomachinery rotating components; large gears, pinions and gear shafts; couplings; seamless rolled rings; heavy shafting; round/square/flat/rectangular bars; discs, hubs, sleeves.

Material data

Chemistry (1.6749 / jnmt data, wt%): C 0.200.26, Cr 1.602.00, Ni 0.901.20, Mo 0.600.80, V 0.050.15. Quench + temper; full martensitic transformation beyond 400 mm; endurance limit ~430470 MPa. Same grade as 23CrNiMo7-4-7 / 1.6749.

Standards & quality

Manufactured to EN 10250-3; EAF/AOD/VOD melting (ESR available); 100% UT; full chemistry; impact/fatigue testing on request; EN 10204-3.1 / 3.2.

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; designations indicate the material supplied.