25Ni3
2025-08-25 09:44:13 Origin： Remark：0 Click：
GJB 1220A Material specification for alloy structure steel bar for Artillery parts, stock available round bar 25Ni3 flat bar, forgings, 25Ni3 cold drawn
TECHNICAL DATA SHEET - 25Ni3
MATERIAL CATEGORY - Specification for Alloy Structure Steel Bar for Artillery Parts,
MATERIAL CATEGORY - Specification for Alloy Structure Steel Bar for Artillery Parts,
MATERIAL SPECIFICATIONS - GJB 1220A - 2008.
PRODUCT DESCRIPTION
Alloy 25Ni3 is usually produced by EAF + VD + LF / BEF 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。
Final heat treatment - quenched and tempered.
PRODUCT FORMS & DIMENSIONS
Rod & round bar & disc (diameter): 5.5 ~ 950 mm
Square bar & flat bar: T8 ~ 450 X W 15 ~ 600 X L mm
Length: random length or based on the customer's special requirement.
Plate & Sheet steel: T 0.5 - 200 X W 10 - 1000 X L mm
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.
TYPICAL CHEMICAL COMPOSITIONS (mass fraction %)
Carbon, C (％): 0.21 ~ 0.29
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.40 ~ 0.70
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.020
Chromium, Cr (％): ≤ 0.30
Nickel, Ni (%): 2.75 ~ 3.25
Molybdenum, Mo (％): -
Vanadium, V (％): -
Tungsten, W (%): -
Aluminum, Al (%): -
Titanium, Ti (%): -
Rod & round bar & disc (diameter): 5.5 ~ 950 mm
Square bar & flat bar: T8 ~ 450 X W 15 ~ 600 X L mm
Length: random length or based on the customer's special requirement.
Plate & Sheet steel: T 0.5 - 200 X W 10 - 1000 X L mm
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.
TYPICAL CHEMICAL COMPOSITIONS (mass fraction %)
Carbon, C (％): 0.21 ~ 0.29
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.40 ~ 0.70
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.020
Chromium, Cr (％): ≤ 0.30
Nickel, Ni (%): 2.75 ~ 3.25
Molybdenum, Mo (％): -
Vanadium, V (％): -
Tungsten, W (%): -
Aluminum, Al (%): -
Titanium, Ti (%): -
Ferrum, Fe (%): balance.
HEAT TREATMENT PRACTICE - MECHANICAL PROPERTIES AT RM.
Heat treatment temperature /℃ | annealing: -.
Heat treatment temperature /℃ | Normalizing: -
Heat treatment temperature /℃ | Quenching: 840 water / oil cooling
Heat treatment temperature /℃ | Tempering : 520 water / oil cooling
Hardness after annealing ≤ HB: 217
Tensile strength, Rm ≥ MPa: 785
Yield strength, Rp0.2 ≥ MPa: 590
Elongation, A ≥ (%): 7.0
Reduction of area, Z ≥ (%): 45.0
Impact strength, AKu ≥ J: 47
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.
Raw Material Stock Available
Custom 450 / GD450 / XM-25 (S45000), 403 ESR, AISI 616 / 422 ESR, B50A365 / 403Cb+
17-4PH / 630, M-152 / 1.4938 / S151D, FV520B / S143 / 1.4594. X22CrMoV12-1
13Х11Н2B2MФ / AE961W, 11Х11Н2B2MФ / 16Х11Н2B2MФ
AISI 615 / S41800, 15-5PH / XM-12 (S15500), A-286 AISI 660 / S66286
10705BU, 10705MBU, 10705AJ, S132, S131, S111, S159, S154
If you are interested in our products or services, pleased to EMAIL (sales@ccsteels.com) our qualified production engineers or sales department.
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