SAE-AISI 4130 (SCM430, G41300) Steel

 

 

AISI 4130 Steel 

Country	USA	BS	BS	Japan
Standard	ASTM A29	EN 10250/EN10083	BS 970	JIS G4105
Grades	4130	25CrMo4/1.7218	708A25/708M25	SCM430

 

 Chemical Composition

Standard	Grade	C	Mn	P	S	Si	Cr	Mo
ASTM A29	4130	0.28-0.33	0.40-0.60	0.035	0.040	0.15-0.35	0.80-1.10	0.15-0.25
EN10250 /EN10083	25CrMo4/ 1.7218	0.22-0.29	0.60-0.90	0.025	0.035	≦0.40	0.90-1.2	0.15-0.30
JIS G4105	SCM430/ SCM2	0.28-0.33	0.60-0.85	0.030	0.030	0.15-0.35	0.90-1.2	0.15-0.30

 Mechanical Properties

 

Density (lb / cu. in.) 0.283

Specific Gravity 7.8

Specific Heat (Btu/lb/Deg F – [32-212 Deg F]) 0.114

Melting Point (Deg F) 2610

Thermal Conductivity 22.3

Mean Coeff Thermal Expansion 7

Modulus of Elasticity Tension 29

 

 Mechanical Properties

Properties	Metric
Tensile strength, ultimate	560 MPa
Tensile strength, yield	460 MPa
Modulus of elasticity	190-210 GPa
Bulk modulus (Typical for steel)	140 GPa
Shear modulus (Typical for steel)	80 GPa
Poissons ratio	0.27-0.30
Elongation at break (in 50 mm)	21.50%
Reduction of area	59.6
Hardness, Brinell	217
Hardness, Knoop (Converted from Brinell hardness)	240
Hardness, Rockwell B (Converted from Brinell hardness)	95
Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.)	17
Hardness, Vickers (Converted from Brinell hardness)	228
Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.)	70

Thermal Properties

 

In the aerospace industry, AISI 4130 steel's high strength-to-weight ratio makes it ideal for structural parts. It can withstand the extreme stresses and vibrations encountered during flight, ensuring the safety and reliability of aircraft. The steel's weldability also allows for easy fabrication and customization of aerospace components.

 

The automotive industry benefits from the strength and durability of AISI 4130 steel. In high-performance vehicles, it handles the demanding conditions of racing and off-roading. Its weldability enables easy fabrication of custom parts, enhancing the performance and safety of the vehicles.

In the oil and gas industry, AISI 4130 steel's resistance to corrosion and high pressure makes it suitable for transporting and storing hydrocarbons. Wellhead components and valves made of this steel ensure reliable operation in harsh environments.

 

The construction industry relies on AISI 4130 steel for its strength and durability. Structural elements such as beams, columns, and trusses provide long-term stability and safety to buildings and bridges. Construction machinery and equipment made of this steel are robust and reliable.

 

In the marine industry, AISI 4130 steel's resistance to corrosion and seawater makes it ideal for ship hulls and offshore platforms. It can withstand the harsh marine environment and ensure the structural integrity of these structures.

 

In the power generation industry, AISI 4130 steel is used in equipment that requires high strength and temperature resistance. It ensures reliable operation of power generation facilities.

 

In the chemical processing industry, AISI 4130 steel is utilized for handling corrosive substances and high-pressure environments. Its durability and resistance to corrosion make it a suitable choice for chemical processing plants.

 

In conclusion, AISI 4130 steel is a highly versatile and reliable material with a wide range of applications. Its exceptional mechanical properties make it an ideal choice for various industries, ensuring the performance and safety of numerous products and structures.

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