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12CD9-10
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We are professional 12CD9-10 forged forging rings seamless rolled rings forged forging Sleeves Bushes Bushing Pipes Piping tube tubings barrels Casing Cases Shells blocks round bars hollow bars cylinders hubs housings,12CD9-10 forged forging steel discs disks tubesheets tube sheets tube plates,12CD9-10 forged forging steel valve body bodies blocks valve bonnets valve stems valve closures valve seat rings valve parts valve components,12CD9-10 forged forging steel Girth flange Channel cover shafts forged forging FVC type Self Reinforced Nozzle Long welding neck Nozzle neck Flanges Cover Flanges,Shell Tube Heat Exchanger components parts forged forging pieces forged forging steel components 12CD9-10 FRONT REAR Fixed STATIONARY Floating Cladding Clad Cladded Welding Welded Overlay Overlayed Coated Tube Sheets TUBESHEETS from china


Chemical Composition(%)

CMnSiPSCrMo
0.05-0.150.30-0.600.50 max0.040 max0.040 max2.00-2.500.87-1.13

Mechanical Properties(T=20°C)

Delivery ConditionTensile Strength Rm (Mpa)Yield Strength Rp0.2 (Mpa)Elongation(%)Reduction Ratio(%)Hardness (HB)
Normalized and Tempered900 min675 min///
Slow Cooling415 min205 min20 min35 min170 max

HEAT TREATMENT

Normalizing: Temperature: 920°-980°C.
Stress Relieving: Stree relieving to remove maching stresses should be carried out by heating to 675°C, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Austenization: Temperature:920°-980°C
Tempering: Tempering temperature: 650°-750°C
Forging: Hot forming temperature: 850°-1050°C