AISI/SAE 8640
2025-06-24 15:18:00 Origin： Remark：0 Click：
AISI 8640 technical data sheet, SAE 8640 Round bar, flat bar, plate, ESR ingot melted, Blooming, Hot forging, hot rolling, heat treatment
TECHNICAL DATA SHEET - AISI 8640 & SAE 8640
MATERIAL CATEGORY: SAE, AISI, UNS system alloy structural steel
MATERIAL SPECIFICATIONS: SAE J1249 -2000
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
CHEMICAL COMPOSITIONS (mass weight %)
Carbon, C (％): 0.38 ~ 0.43
CHEMICAL COMPOSITIONS (mass weight %)
Carbon, C (％): 0.38 ~ 0.43
Silicon, Si (%): 0.15 ~ 0.35
Manganese, Mn (％): 0.75 ~ 1.00
Manganese, Mn (％): 0.75 ~ 1.00
Phosphorus, P (％) ≤: 0.035
Sulfur, S (％) ≤: 0.040
Chromium, Cr (%): 0.40 ~ 0.60
Nickel, Ni (%): 0.40 ~ 0.70
Molybdenum, Mo (%): 0.15 ~ 0.25
MECHANICAL PROPERTIES AND HOT WORKING
Mechanical property ≥ σb / MPa: 848
Mechanical property ≥ σs / MPa: 717
Mechanical property ≥ δ5 (%): 19.0
Mechanical property ≥ σs / MPa: 717
Mechanical property ≥ δ5 (%): 19.0
Mechanical property ≥ ψ (％): -
Hardness HBS /Annealed COND: 221
Hot working temperature /℃: 1100～850
MAIN FEATURES AND MELTING PROCESS
The steels shall be manufactured by melting process EF, LF + EAF+ VD, IFF + ESR Melted. VIM + ESR can be handled by agreement. Forgings may be furnished in one of the following conditions: stress relieving; annealing; solution treatment; solution treatment and ageing; normalizing; normalizing and tempering; or quenching and tempering.
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 rods.
Mechanical parts - connecting rods, bolts and nuts.
Multidiameter shafts.
PROFILE AND DIMENSIONS
Rod / round bar / disc (diameter): 5.50mm to 800mm
Square bar / flat bar: 8mm to 600mm
Length: random length, based on the customer's special requirement.
Steel strip: T0.20 ~ 3mm X W10 ~ 2000mm X Coil
Heavy / middle plate via hot rolled: T4 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts, other different shapes based on OEM.
The steels shall be manufactured by melting process EF, LF + EAF+ VD, IFF + ESR Melted. VIM + ESR can be handled by agreement. Forgings may be furnished in one of the following conditions: stress relieving; annealing; solution treatment; solution treatment and ageing; normalizing; normalizing and tempering; or quenching and tempering.
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 rods.
Mechanical parts - connecting rods, bolts and nuts.
Multidiameter shafts.
PROFILE AND DIMENSIONS
Rod / round bar / disc (diameter): 5.50mm to 800mm
Square bar / flat bar: 8mm to 600mm
Length: random length, based on the customer's special requirement.
Steel strip: T0.20 ~ 3mm X W10 ~ 2000mm X Coil
Heavy / middle plate via hot rolled: T4 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts, other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE & SERVICE
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers.
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers.
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