- AISI 4340 round bar
- AISI 4340 forging
- AISI 4340 sheet
- AISI 4340 flat bar
- AISI 4340 pipe
AISI 4340
We can produce AISI 4340 stainless steel round rods, AISI 4340 forging,sheet,coil,and profiledstrip,Deformed steel,flat steel,mould,steel wire,have all specifications. With DuoNian production experience, strict control AISI 4340 chemical composition and AISI 4340 mechanical properties.From casting, forging, steel to hot and cold rolling process, heat treatment, etc, we have the control of professional engineers. We have advanced precision machining equipment, according to the requirements of users machining. in order to achieve the most satisfied with the user requirements.
Production specification
Round bar steel: 1mm to 3500mm
Square-shape steel: 1mm to 4000mm
Plate steel:0.1mm to 4000mm
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: φ6-1800mm, 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.
Square-shape steel: 1mm to 4000mm
Plate steel:0.1mm to 4000mm
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: φ6-1800mm, 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.
AISI 4340
Designation by Standards
| Brand Name | LH No. | Mat. No. | DIN | EN | AISI |
| TORKA | 787 | - | - | - | 4340 |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.46 | 0.27 | 0.65 | 0.95 | 0.25 | 1.55 | 0.14 | - | - |
Description
TORKA is a heat treatable, low steel/" target="_blank" class="keylink">alloy steel containing nickel, chromium and molybdenum. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength.
Applications
Permanently stressed machine, engine and vehicle parts when high strength and toughness are required. Typical applications are for structural use, such as aircraft landing gear, power transmission gears and shafts and other structural parts.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.85
Soft Annealing
A full anneal may be done at 840oC followed by controlled (furnace) cooling at a rate not faster than 10oC per hour down to 300oC. From 300oC it may be air cooled.
Normalizing
Temperature: 890oC
Hardening
Harden from a temperature of 830oC followed by oil quenching.
Tempering
The temperature for tempering depends upon the strength level desired. Before tempering the alloy should be in the heat treated or normalized & heat treated condition. For strength levels in the 260 - 280 ksi range temper at 230oC.
Forging
Hot forming temperature: 1100-850oC.
Machinability
Machining is best done with this alloy in the annealed or normalized and tempered condition. It can be machined by all conventional methods..
Corrosion Resistance
This is a low steel/" target="_blank" class="keylink">alloy steel and not a corrosion resistant alloy. Protective coating should be used.
Welding
The alloy can be fusion or resistance welded. Preheat and post heat weld procedures should be followed when welding this alloy by established methods.
Cold working
The TORKA alloy may be cold worked, in the annealed condition, by conventional methods and tooling. It has good ductility.
Mechanical properties
AISI 4340 Mechanical properties,Our production completely according to the AISI 4340 standards to meet the AISI 4340 mechanical performance, can also according to the customer request, to meet the requirements of customers of AISI 4340 mechanical properties.
Heat treatment
AISI 4340 Heat treatment,Our production completely according to the AISI 4340 standards to meet the AISI 4340 Heat treatment, can also according to the customer request, to meet the requirements of customers of AISI 4340 Heat treatment.
Machining
AISI 4340 Machining,Our production completely according to the AISI 4340 standards to meet the AISI 4340 Machining, can also according to the customer request, to meet the requirements of customers of AISI 4340 Machining.
Welding performance
AISI 4340 Welding performance,Our production completely according to the AISI 4340 standards to meet the AISI 4340 Welding performance, can also according to the customer request, to meet the requirements of customers of AISI 4340 Welding performance.
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