Products

We are committed to providing one-stop service for steel pipe products to customers around the world.

OCTG pipe,Seamless steel pipe manufacturer,Casing and tubing
BackYou are in :  Home  >  Products  >  Special Steel  >  AISI 4130 Alloy Steel
Product Gategory
Factory
  • OCTG pipe,Seamless steel pipe manufacturer,Casing and tubing
  • OCTG pipe,Seamless steel pipe manufacturer,Casing and tubing

AISI 4130 Alloy Steel

Category : Special Steel

Standard: ASTM A29

Size:

Rolled: Diameter 40-200mm

Forged: Diameter 80-600mm

  • Description
  • Specification
  • Standard
  • Process
  • Packing

AISI/SAE 4130 steel grade is a versatile alloy with good atmospheric corrosion resistance and reasonable strength up to around 315º C (600º F). It shows good overall combinations of strength, toughness and fatigue strength.


AISI 4130 alloy steel is a medium carbon, low alloy steel in ASTM A29 standard. ASTM 4140 steel is also commonly referred to as a chromoly steel, or chrome moly steel, containing nominally 0.28-0.33% Carbon, 0.8-1.1% Chromium and 0.15-0.25% Molybdenum. It is similar to 4140 steel which has a higher carbon level (0.28-0.33%), giving 4130 material improved weldability, at the expense of through thickness strength. With the proper heat treatment it is also readily machined. Annealing ASTM 4130 alloy steel offers excellent ductility. AISI 4130 steel is usually supplied as round bar commonly in the hardened and tempered condition


AISI 4130 Steel Specification and Relevant Standards

Country

USA

BS

BS

Japan

Standard

ASTM A29

EN 10250/EN10083

BS 970

JIS G4105

Grades

4130

25CrMo4/1.7218

708A25/708M25

SCM430

 

ASTM 4130 Steels And Equilvalents 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


AISI 4130 Steel 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

Properties

Metric

Thermal conductivity (100°C)

42.7 W/mK

Smelting Option

1 EAF: Electric Arc Furnace

2 EAF+LF+VD: Refined-smelting and vacuum degassing


Forming Option

1 Hot rolling process

2 Hot Forging: Electro-hydraulic; High-speed-hydraulic; Oil-hydraulic; Precision-forging


Heat-treatment Option

1 +A: Annealed (full/soft/spheroidizing)

2 +N: Normalized

3 +NT: Normalized and tempered

4 +QT: Quenched and tempered (water/oil)


Suface Option

1 Black Surface

2 Grounded: Bright but rough ; Not precision

3 Machining for plate: Bright and precision; Little turning scar

4 Peeled/Turned: Bright and precision; Little turning scar

5 Polished: Very Bright and precision size; Not turning scar


Other Services

1 Cutting: Small pieces

2 CNC Machine: Produce as your drawing

3 Package: Bare/Nylon/Canvas/Wooden

4 Payment:T/T, L/C, O/A(request credit)

5 Transport:FOB/CFR/CIF/DDU/DDP (train/ship/Air)

Forging of 4130 Alloy Steel

ASTM A29 Grade 4130 steel should be forged between 1230 and 950 º C (2250 and 1750 º F). The lower the finishing temperature from forging, the finer will be the grain size. If the 4130 alloy steel is forged at too low a temperature, there is a risk of the formation of a non-uniform structure in certain areas of the forged part, necessitating a normalizing treatment, prior to further heat treatment.

Recommended Products