21CrMoVA
2024-03-29 09:50:53   Origin：   Remark：0 Click：

TECHNICAL DATASHEET - GB 21CrMoVA
MATERIAL CATEGORY - Steels for Turbine bolts and nuts at high tmperature
PRODUCT DESCRIPTION
The alloy is usually produced by EAF + VD + LF followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - Quenched and tempered. 
Stock Available: Round bar diam. 20 ~ 350mm
MATERIAL SPECIFICATIONS - GB/T 20410 - 2006
CHEMICAL COMPOSITION (mass weight - %)      
Carbon, C (％): 0.17 ~ 0.25
Silicon, Si (％): 0.15 ~ 0.35
Manganese, Mn (％): 0.35 ~ 0.85
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.020
Chromium, Cr (％): 1.20 ~ 1.50
Molybdenum, Mo (％): 0.65 ~ 0.80
Nickel, Ni (%): ≤ 0.30
Copper, Cu (％): ≤ 0.25
Vanadium, V (%): 0.25 ~ 0.35
Titanium, Ti (%): -
Boron, B (%): -
Nitrogen, N (%): -
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Heat treatment temperature /℃| annealing: 690 ~ 710 air cooling.
Heat treatment temperature /℃| Normalizing:  -
Heat treatment temperature /℃| Quenching:  930 ~ 950 Oil
Heat treatment temperature /℃| Tempering : 730
Hardness after annealing ≤HBS:  241 Max.
Tensile strength, Rm ≥ MPa:  700 ~ 850
Yield strength, Rp0.2 ≥ MPa:  550
Elongation, A ≥ (%): 16.0
Reduction of area, Z ≥ (%): 55.0
Impact strength, AKv ≥ J:  50
PRODUCT PROFILE & DIMENSIONS
Round bar & Disc (diameter): 5.5mm to 900mm
Square bar / Flat bar: 8mm to 600mm
Length: Fixed length or random length or based on the customer's special requirement.
Sheet steel via cold rolled: T0.5 - 6mm X W600- 1000mm X L1000 - 2000mm
TYPICAL APPLICATIONS
Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on. 
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners, Mechanical gears, gear shaft, main axis, valve rod
Mechanical parts - connecting rod, bolt and nuts.
Multidiameter shaft, Pressure vessel parts.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to email or call our resident team of qualified production engineers, Email: sales@ccsteels.com.