40CrMnMo
2025-09-14 08:48:38 Origin： Remark：0 Click：
GJB 1220A Material specification for alloy structure steel bar for Artillery parts, 40CrMnMo stock available round bar, flat bar, cold drawn rod, and forgings.
TECHNICAL DATA SHEET - 40CrMnMo
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 40CrMnMo 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.
Stock available: round bar diam. 25 ~ 200 mm, plate, billets.
PRODUCT PROFILE & DIMENSIONS
Rod & round bar & disc (diameter): 6.0 ~ 910 mm
Square bar & flat bar: T8 ~ 400 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 ELEMENTS (mass weight %)
Carbon, C (％): 0.37 ~ 0.45
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.90 ~ 1.20
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.020
Chromium, Cr (％): 0.90 ~ 1.20
Nickel, Ni (%): ≤ 0.30
Rod & round bar & disc (diameter): 6.0 ~ 910 mm
Square bar & flat bar: T8 ~ 400 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 ELEMENTS (mass weight %)
Carbon, C (％): 0.37 ~ 0.45
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.90 ~ 1.20
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.020
Chromium, Cr (％): 0.90 ~ 1.20
Nickel, Ni (%): ≤ 0.30
Molybdenum, Mo (％): 0.20 ~ 0.30
Vanadium, V (％): -
Tungsten, W (%): -
Aluminum, Al (%): -
Titanium, Ti (%): -
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: 850 oil cooling
Heat treatment temperature /℃ | Tempering : 600 air cooling
Hardness after annealing ≤ HBW: 217
Tensile strength, Rm ≥ MPa: 980
Yield strength, Rp0.2 ≥ MPa: 785
Elongation, A5 ≥ (%): 10.0
Reduction of area, Z ≥ (%): 45.0
Impact strength, AKu ≥ J: 71
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 (ESR ingot, round bar, plate) stock available
Custom 450 / 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
X8CrMnN18-18, X40MnCrN19, X40MnCr18, X55MnCrN18-4
15-5PH / XM-12 (S15500), A-286 AISI 660 / S66286
10705BU, 10705MBU, 10705AJ, S111, S159
If you are interested in our products or services, pleased to EMAIL (sales@ccsteels.com) our qualified production engin
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