20CrA
2024-07-30 09:16:23 Origin： Remark：0 Click：
GJB 1951-94 Material Specification for Quality Structure Steel Bars for Aviation 20CrA Stock Available Round bar, Flat bar 20CrA Forgings
MATERIAL STANDARD DATASHEET - GJB 20CrA
MATERIAL CATEGORY - Specification for Quality Structure Steel Bars for Aviation.
MATERIAL CATEGORY - Specification for Quality Structure Steel Bars for Aviation.
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.
Mechanical parts - connecting rod, bolt and nuts.
Multidiameter shaft, Pressure vessel parts.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners, Mechanical gears, gear shaft, main axis, valve rod.
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.
Mechanical parts - connecting rod, bolt and nuts.
Multidiameter shaft, Pressure vessel parts.
Power generation – turbine fasteners – boiler support rods.
Process plant – fasteners, Mechanical gears, gear shaft, main axis, valve rod.
PRODUCT DESCRIPTION
The alloy is usually produced by EAF + VD + LF / BEF / VIM 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 ~ 300mm
PRODUCT PROFILE & DIMENSIONS
Round bar & Disc (diameter): 5.5 ~ 850mm
Square bar / Flat bar: 6 ~ 600mm
Length: Fixed length or random length or based on the customer's special requirements.
Plate & Sheet steel: T 2.0 ~ 350 X W 10 ~ 1500 X L mm
Round bar & Disc (diameter): 5.5 ~ 850mm
Square bar / Flat bar: 6 ~ 600mm
Length: Fixed length or random length or based on the customer's special requirements.
Plate & Sheet steel: T 2.0 ~ 350 X W 10 ~ 1500 X L mm
MATERIAL SPECIFICATIONS - GJB 1951 - 94
MAIN CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.18 ~ 0.24
Manganese, Mn (％): 0.50 ~ 0.80
Silicon, Si (％): 0.17 ~ 0.37
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.015
Chromium, Cr (％): 0.70 ~ 1.00
Nickel, Ni (%): ≤ 0.30
Molybdenum, Mo (％): -
Vanadium, V (％): -
Tungsten, W (%): -
Ferrum, Fe (%): -.
MAIN CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.18 ~ 0.24
Manganese, Mn (％): 0.50 ~ 0.80
Silicon, Si (％): 0.17 ~ 0.37
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.015
Chromium, Cr (％): 0.70 ~ 1.00
Nickel, Ni (%): ≤ 0.30
Molybdenum, Mo (％): -
Vanadium, V (％): -
Tungsten, W (%): -
Ferrum, Fe (%): -.
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT
Heat treatment temperature /℃| annealing: -.
Heat treatment temperature /℃| Normalizing: -
Heat treatment temperature /℃| Quenching: 780 ~ 820 oil
Heat treatment temperature /℃| Tempering : 170 ~ 230 air
Hardness after annealing, ≤ HBW: 179 Max.
Tensile strength, Rm ≥ MPa: 835
Yield strength, Rp0.2 ≥ MPa: 540
Elongation, A5 ≥ (%): 10.0
Reduction of area, Z ≥ (%): 40.0
Impact strength, AKu ≥ J: 47
Hardness after final heat treatment / HBW: -
Hardness after annealing, ≤ HBW: 179 Max.
Tensile strength, Rm ≥ MPa: 835
Yield strength, Rp0.2 ≥ MPa: 540
Elongation, A5 ≥ (%): 10.0
Reduction of area, Z ≥ (%): 40.0
Impact strength, AKu ≥ J: 47
Hardness after final heat treatment / HBW: -
TECHNICAL SALES ASSISTANCE & SERVICE
20+ years Focus On Special Steel Manufacturing and processing.
Stock over 60 grades with a competitive price, along with cutting service for specific requirement.
Customizing special material is welcome.
20+ years Focus On Special Steel Manufacturing and processing.
Stock over 60 grades with a competitive price, along with cutting service for specific requirement.
Customizing special material is welcome.
We closely cooperate with the professional inspection partners to strictly control the quality and improve the quality manage system, and guarantee the goods delivery each time. It is proved that we are worth of trusting and will be the strategic partner of the supplying chains in the special steels field.
If you meet further on any technical enquiry, pleased to email ( sales@ccsteels.com.) or call our resident team of qualified production engineers.
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