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| Place of Origin | Jiangsu China |
| Brand Name | Guangda |
| Certification | DNV, BV, Rina, ISO, GL, ABS, LR ,CCS ,PED |
AISI 4130 Steel | 25CrMo4 | 1.7218 | 708A25 | SCM430 Forged Round Bar Alloy Steel Bar
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/SAE 4130 is a low alloy steel containing chromium and molybdenum as strengthening agents. This steel has good strength and toughness, weldability (due to its low carbon content) and machinability. AISI 4130 is a versatile alloy with good atmospheric corrosion resistance. It has a good combination of strength, toughness and fatigue strength.
Forged Round Bar AISI 4130 Product features
| Material | AISI 4130 1.7218 |
| Type | Forged bar ,round ,square, flat, block, shaft etc. |
| Diameter | φ150-1500mm |
| Length | Max 10000mm (10m) |
| Surface | Black, peeled, polishing, bright, sand blast, hair line, etc. |
| Application | Heavy machinery axle,turbine shaft blade, high load of transmission parts, fasteners, crank shafts, gears, as well as heavily loaded parts for motor construction etc. |
| Tensile strength test | DIN EN ISO 6892-1 |
| Impact test | DIN EN ISO 148-1 |
| UT | DIN EN10228 Quality-Class 3 C/c or D/d |
| Grain size | ASTM E112 / EN ISO 643 |
| Applicable standard | EN10250,EN10083,SEW550 etc |
| Certificate | EN 10204 / 3.1 3.2 |
Forged Round Bar Forged Round Bar AISI 4130 Chemical Compostion
| Standard | Grade | C | Mn | P | S | Si | Cr | Mo |
| ASTM A29 | 4130 | 0.28-0.33 | 0.40-0.60 | 0.035 | 0.04 | 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 |
Forged Round Bar AISI 4130 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 |
Forged Round Bar AISI 4130 Comparison of steel grades
|
CES Name
|
UK | UN | USA | Germany | France | Italy | Japan | Russia | ||
| 4130 | 708A30 | G41300 | 4130 | 1.7218 | 25CrMo4 | 30CD4 | 30CrMo4 | SCM420 | 30ChM |
Forged Round Bar AISI 4130 Heat treatment
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.
Forged Round Bar AISI 4130 Application
About Guangda For forged round bar
4130 round bar
4130 steel
AISI 4130
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