4340 alloy steel plate advantage

1. High Strength: 4340 has high strength, especially after proper heat treatment. This makes it ideal for pin applications where high loads and stresses are required.
2. Good toughness: 4340 alloy steel maintains good toughness while maintaining high strength. This means it has better resistance to cracking and breaking when subjected to impact loads.
3. Wear Resistance: Due to its hardness and strength, 4340 has good wear resistance, making it resistant to wear and friction in pin applications.
4. Heat Treatability: 4340 alloy steel is easily heat treatable and its hardness and strength can be adjusted through quenching and tempering to meet the requirements of specific applications.
5. Corrosion resistance: 4340 alloy contains elements such as chromium and nickel, which has certain corrosion resistance, so it is suitable for applications in certain harsh environments.

4340 alloy steel plate application

1. 1.Aerospace field: Pins play an important role in aircraft, helicopters, spacecraft and other aerospace equipment. The high strength and wear resistance of SAE 4340 alloy steel make it very useful in this field.
2. 2.Automotive industry: Pins are used in automotive transmission systems, suspension systems and other critical components. The high strength and toughness of SAE 4340 make it one of the choices of automobile manufacturers.
3. 3.Construction machinery: 4340 alloy steel is also commonly used in various construction machinery, such as pins and other parts of excavators, loaders and bulldozers.
4. 4.Marine and Offshore Engineering: Pins are used in a variety of applications on ships and offshore installations. Corrosion resistance and high strength are key properties for use in seawater environments.

4340 alloy steel plate chemical composition

Standard	Grade	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A29	4340	0.38-0.43	0.60-0.80	0.035	0.040	0.15-0.35	1.65-2.00	0.70-0.90	0.20-0.30
EN 10250	36CrNiMo4/1.6511	0.32-0.40	0.50-0.80	0.035	0.035	≦0.40	0.90-1.20	0.90-1.2	0.15-0.30
BS 970	EN24/817M40	0.36-0.44	0.45-0.70	0.035	0.040	0.1-0.40	1.3-1.7	1.00-1.40	0.20-0.35
JIS G4103	SNCM 439/SNCM8	0.36-0.43	0.60-0.90	0.030	0.030	0.15-0.35	1.60-2.00	0.60-1.00	0.15-0.30

4340 alloy steel plate Mechanical Properties

Properties	Metric	Imperial
Thermal expansion co-efficient (20°C/68°F, specimen oil hardened, 600°C (1110°F) temper	12.3 µm/m°C	6.83 µin/in°F
Thermal conductivity (typical steel)	44.5 W/mK	309 BTU in/hr.ft².°F

4340 alloy steel plate specification

Product Name	4340 Alloy steel plate
Thickness	8mm-150mm
Length	1m-14m or according to customer's special request
width	1000mm-4000mm
Material grade	AISI 4140, 4130, 5140, 5120，4340
surface	Blackface
Standard	ASTM, GB, AISI
Certificate	MTC
Delivery times	Delivered within 30 days after the receipt of deposit
Package	tied up with steel strips and wrapped with water proof paper
Application Range	Widely used in transportation, construction, decoration, equipment around the base plate, machinery, shipbuilding and other fields
Advantages	1. Reasonable price with excellent quality 2. Abundant stock and prompt delivery 3. Rich supply and export experience, sincere service