Our 4340 forgings have high strength, ductility, toughness, creep resistance, and fatigue resistance after the heat treatment. They are ideal material for your heavy duty forged shafts，sprockets, rotor shafts manufacturing. Besides these parts, 4340 forgings are also ideal blanks for fasteners, aircraft, automotive, and hydraulic systems.
Good shock resistance.
Good impact resistance.
High wear and abrasion resistance.
4340 forgings applications:
Typical applications of 4340 forgings are: sprockets, heavy duty shafts, gears, axles, spindles, couplings, pins etc.
duplex sprocket forging 4340 forging condition W
Our duplex sprocket forging made of 4340 forging in condition W has tensile strength range from 1080 MPa to 1230 MPa.
4340 sprocket forgings
Our 4340 sprocket forgings have high strength, ductility, toughness, creep resistance, and fatigue resistance.
AS 4340 condition W
AS 4340 alloy steel forgings condition W. Tensile strength 1080-1230 MPa. Yield strength ≥925MPa.
4340 forgings chemical composition
AISI 4340 steel material chemical composition is listed in the following table based on cast analysis.
4340 forgings equivalent materials
ASTM AISI 4340 steel equivalent to SAE, European (German DIN, British BSI, France NF), Japanese JIS and Chinese GB standard (for reference).
4340 forgings mechanical properties
The mechanical properties of 4340 are highly dependent on the heat treatment.
- yield strengths 740-1860 MPa
- tensile strengths: 860-1980 MPa
- elongations: 11-23%,
- plane strain fracture toughness: 53-110 MPa√m
What's difference between 4140 forgings and 4340 forgings?
4340 forgings has more carbon than 4140 forgings. But 4140 forgings has more chromium than 4340 forgings. One of the most significant differences between the two steel forgings is the inclusion of nickel in 4340 forgings, which accounts for the metal’s greater strength and fracture toughness.
Jiangsu Weirun Forging Co,.ltd is a professional manufacturer and supplier of steel forgings in Jiangsu Province China. We supply quality steel forgings with heat treatment and rough machining services according to your requirement. You can get carbon steel forgings, alloy steel forgings and stainless steel forgings from us for your manufacturing of shafts, gears, sleeves, drums, fasteners, clamps, cylinders ect.
Why Choose Us
To be your best partner for your projects
Profession
We are a professional team to provide products which satisfy your demand.
Cooperation
Mutual benefit and long-term cooperation are our goals.
Service
Professional pre-sales and after-sales service to reduce your cost and save your time.
Quality
Strict with test for production & products and ISO quality management system.