GJB 20CrNi3A
2024-09-02 07:58:32 Origin： Remark：0 Click：
GJB 1951-94 Material Specification for Quality Structure Steel Bar for Aviation 20CrNi3A Stock Available Round bar, Flat bar 20CrNi3A Forgings
MATERIAL DATA SHEET - GJB 20CrNi3A
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 & Rod (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 & Rod (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
TYPICAL CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.17 ~ 0.25
Manganese, Mn (％): 0.30 ~ 0.60
Silicon, Si (％): 0.17 ~ 0.37
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.015
Chromium, Cr (％): 0.60 ~ 0.90
Nickel, Ni (%): 2.75 ~ 3.25
Molybdenum, Mo (％): -
Vanadium, V (％): -
Tungsten, W (%): -
Ferrum, Fe (%): balance.
TYPICAL CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.17 ~ 0.25
Manganese, Mn (％): 0.30 ~ 0.60
Silicon, Si (％): 0.17 ~ 0.37
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.015
Chromium, Cr (％): 0.60 ~ 0.90
Nickel, Ni (%): 2.75 ~ 3.25
Molybdenum, Mo (％): -
Vanadium, V (％): -
Tungsten, W (%): -
Ferrum, Fe (%): balance.
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT
Heat treatment temperature /℃| annealing: -.
Heat treatment temperature /℃| Normalizing: -
Heat treatment temperature /℃| Quenching: 820 ~ 840 oil, water
Heat treatment temperature /℃| Tempering : 400 ~ 500 oil or water
Hardness after annealing, ≤ HBW: 163 ~ 241.
Tensile strength, Rm ≥ MPa: 980
Yield strength, Rp0.2 ≥ MPa: 825
Elongation, A5 ≥ (%): 10.0
Reduction of area, Z ≥ (%): 55.0
Impact strength, AKu ≥ J: 78
Hardness after final heat treatment / HBW: 293 ~ 341
Hardness after annealing, ≤ HBW: 163 ~ 241.
Tensile strength, Rm ≥ MPa: 980
Yield strength, Rp0.2 ≥ MPa: 825
Elongation, A5 ≥ (%): 10.0
Reduction of area, Z ≥ (%): 55.0
Impact strength, AKu ≥ J: 78
Hardness after final heat treatment / HBW: 293 ~ 341
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.
If you are interested in our products or services, or would like to learn more about us, pleased to EMAIL (sales@ccsteels.com) our qualified production engineers or sales department.
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