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AISI 4340 Alloy Steel

We can produce AISI 4340 Alloy Steel stainless steel round rods, AISI 4340 Alloy Steel forging,sheet,coil,and profiledstrip,Deformed steel,flat steel,mould,steel wire,have all specifications. With DuoNian production experience, strict control AISI 4340 Alloy Steel chemical composition and AISI 4340 Alloy Steel 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.

AISI 4340

Category	Steel
Class	Alloy steel
Type	Standard
Common Names	Nickel-chromium-molybdenum steel
Designations	Germany: DIN 1.6565 Japan: JIS SNCM 8 United Kingdom: B.S. 2 S 119 , B.S. 3 S 95 , B.S. 3111 Type 6 , B.S. 817 M 40 United States: AMS 5331 , AMS 6359 , AMS 6359B , AMS 6414 , AMS 6414A , AMS 6415 , AMS 6415G , ASTM A322 , ASTM A331 , ASTM A505 , ASTM A519 , ASTM A547 , ASTM A646 , MIL SPEC MIL-S-16974 , SAE J404 , SAE J412 , SAE J770 , UNS G43400

Chemical Composition

Element	Weight %
C	0.38-0.43
Mn	0.60-0.80
P	0.035 (max)
S	0.04 (max)
Si	0.15-0.30
Cr	0.70-0.90
Ni	1.65-2.00
Mo	0.20-0.30

Mechanical Properties

Properties
Density (×1000 kg/m3)	7.7-8.03
Poisson's Ratio	0.27-0.30
Elastic Modulus (GPa)	190-210
Tensile Strength (Mpa)	744.6
Yield Strength (Mpa)	472.3
Elongation (%)	22.0
Reduction in Area (%)	49.9
Hardness (HB)	217
Impact Strength (J)	51.1

Mechanical properties

AISI 4340 Alloy Steel Mechanical properties,Our production completely according to the AISI 4340 Alloy Steel standards to meet the AISI 4340 Alloy Steel mechanical performance, can also according to the customer request, to meet the requirements of customers of AISI 4340 Alloy Steel mechanical properties.

Heat treatment

AISI 4340 Alloy Steel Heat treatment,Our production completely according to the AISI 4340 Alloy Steel standards to meet the AISI 4340 Alloy Steel Heat treatment, can also according to the customer request, to meet the requirements of customers of AISI 4340 Alloy Steel Heat treatment.

Machining

AISI 4340 Alloy Steel Machining,Our production completely according to the AISI 4340 Alloy Steel standards to meet the AISI 4340 Alloy Steel Machining, can also according to the customer request, to meet the requirements of customers of AISI 4340 Alloy Steel Machining.

Welding performance

AISI 4340 Alloy Steel Welding performance,Our production completely according to the AISI 4340 Alloy Steel standards to meet the AISI 4340 Alloy Steel Welding performance, can also according to the customer request, to meet the requirements of customers of AISI 4340 Alloy Steel Welding performance.

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