8740 alloy
8740 alloy properties and heat treatment forged piece, Including 8740 alloy application and specifications, We have all specifications，Including 8740 alloy steel plate, 8740 alloy sheet, 8740 alloy square steel, 8740 alloy flat bar,8740 alloy round bar,8740 alloy forgings, we can own production and sales.
Introduction to Our Products:
Specialized high quality steel
We have the advantages of equipment, technologies and price
forged/hot rolling/ extrusion of steel
We can produce the 8740 alloy has the following specifications:
Round bar steel: 1mm to 3000mm
Square-shape steel: 1mm to 2000mm
Plate steel:0.1mm to 2500mm
Width: 10mm to 2500mm
Lenth: We can supply any lenth based on the customer's requirement.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Tubings: OD: φ6-219 mm, with wall thickness ranging from 1-35 mm.
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price.
We serve you with our honesty, integrity, and professionality.
Chemical composition % of the ladle analysis of grade 8740 alloy and Standards
AISI 8740 Alloy Steel
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Designations
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Germany: DIN 1.6546
Italy: UNI 40 NiCrMo 2 KB United Kingdom: B.S. Type 7 United States: AMS 6322 , AMS 6322F , AMS 6323 , AMS 6323D , AMS 6325 , AMS 6325D , AMS 6327 , AMS 6327D , AMS 6358 , AMS 6358B , ASTM A322 , ASTM A331 , ASTM A505 , ASTM A519 , MIL SPEC MIL-S-6049 , SAE J404 , SAE J412 , SAE J770 , UNS G87400 |
Chemical Composition
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Element
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Weight %
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C
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0.38-0.43
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Mn
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0.75-1.00
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P
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0.035 (max)
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S
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0.04 (max)
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Si
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0.15-0.30
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Cr
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0.40-0.60
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Ni
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0.40-0.70
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Mo
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0.20-0.30
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Mechanical Properties
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Properties
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Conditions
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T (°C)
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Treatment
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Density (×1000 kg/m3)
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7.7-8.03
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25
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Poisson's Ratio
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0.27-0.30
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25
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Elastic Modulus (GPa)
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190-210
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25
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Tensile Strength (Mpa)
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695.0
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25
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annealed at 815°C
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Yield Strength (Mpa)
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415.8
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Elongation (%)
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22.2
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Reduction in Area (%)
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46.4
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Hardness (HB)
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201
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25
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annealed at 815°C
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Impact Strength (J)
(Izod) |
40
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25
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annealed at 815°C
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Product description:
Step Shaft AISI 8740 Tube AISI 8740 Pie-shaped AISI 8740 Ring AISI 8740 Module Large valves of the main AISI 8740 Other Profiled forgings AISI 8740
Special steel classification:
Stainless steel, Hi-Steel HSLA-80, Mould steel, Heat resistant steel, Tool steel, Ball bearing steel,Spring steel, Alloy Steel, Construction steel, Die steel, High-speed steel, angles, channels, H steel, I-beams, welded pipes, seamless tubes,
Standard:
Our products meet Chinese GB, Japanese JIS, US ASTM, UK BS, EU DIN Standards and so on.
Our advantages:
Our advantages such as advanced management and operation concepts, suitable work facilities, highly qualified talents and a number of trade partners who have long-term and close cooperation with us have ensured us to provide global customers with competitive high-quality commodities and excellent services, quickly, accurately, conveniently and completely.
Machining performance
Download 8740 alloy the mechanical properties of the report, the report provides detailed performance analysis and application. Download >>
Principal Design Features
One of the most widely used precipitation hardening grades in the business. While soft and ductile in the solution annealed condition, it is capable of high properties with a single precipitation or aging treatment. Characterized by good corrosion resistance, high harness, toughness and strength.
Machinability
Long, gummy chips characterize this alloys machinability. It can be machined in the annealed condition, however condition H1150M will yield best results. Post machining solution treatment of parts will be required prior to final hardening if machining in this condition.
Heat Treatment
CONDITION A--Soak at 1900 F (1038 C) for 30 minutes and cool below 60 F (16 C) for complete martensite transformation. CONDITION H 950- Treat Condition A material at 900 F(482 C) for 1 hour, air cool.. CONDITION H925, H1025, H1075, H1100, H1150- Soak solution treated material for 4 hours at specified temperature, air cool, CONDITION H1150M- Soak solution treated material at 1400 F (760 C) for 2 hours, air cool, then re-heat to 1150 F (620 C) for 4 hours and air cool.
Welding
Successfully welded by common fusion and resistance methods, this alloy should not be joined by oxyacetylene welding. AWS E/ER630 filler metal is recommended if required.
Forging
Soak for 1 hour at 2150 F (1177 C) prior to forging. Do not work below 1850 F (1010 C). Post-work solution treatment is required prior to final hardening.