SCM430 Alloy Steel-JIS G4105
SCM430 alloy steel manufacturers and suppliers,supplied with round rods,square/flat bars,rollers,shafts,blocks and forging pieces.
SCM430 is a chromium-molybdenum alloy steel as per Japan Standard.JIS SCM430 steel contains a lower carbon content but provides better weldability comparing with SCM440 Steel.It is frequently applied to the gas & oil area.Typical applications include components such as valve bodies,pumps and fittings.
| Chemical Composition | ||||||||
| National Standard |
Grade | C% | Si% | Mn% | Cr% | Mo% | P% | S% |
| DIN | 25CrMo4 (1.7218) |
0.22-0.29 | ≤0.4 | 0.6-0.9 | 0.9-1.2 | 0.15-0.3 | ≤0.025 | ≤0.035 |
| AISI/SAE | 4130 | 0.28-0.33 | 0.15-0.35 | 0.4-0.6 | 0.8-1.1 | 0.15-0.25 | ≤0.035 | ≤0.04 |
| JIS | SCM430 | 0.28-0.33 | 0.15-0.35 | 0.6-0.85 | 0.9-1.2 | 0.15-0.3 | ≤0.035 | ≤0.04 |
| GB | 30CrMo | 0.26-0.34 | 0.17-0.37 | 0.4-0.7 | 0.8-1.1 | 0.15-0.25 | ≤0.035 | ≤0.035 |
| Size&Tolerance&Process | ||||
| Shape | Size(mm) | Process | Tolerance | Length(mm) |
| Round | Φ6-Φ50 | Cold Drawn | H11 | 3000-5800 |
| Round | Φ40-Φ300 | Hot Rolled | -0/+3mm | 3000-10000 |
| Round | Φ120-Φ1000 | Hot Forged | -0/+3mm | 3000-10000 |
| Flat/Square/Block | Thickness:120-800 Width:120-1500 |
Hot Forged | -0/+3mm | 500-6000 |
Heat Treatment
Normalizing For SCM430
1.Nominal normalizing temperature:840-910°C
2.Hold the temperature for several hours
3.Cooling in the air
Annealing For SCM430
1.Nominal Annealing temperature:660-725°C
2.Cool slowly in the furance
3.Maximum Brinell hardness of 220
Hardening and Tempering(QT) For SCM430
1.Nominal Hardening temperature:845-885°C
2.Hold at this temperature then quench in oil or water
3.Tempering as soon as possible when the temperature low to ambient
4.Heat uniformly to the suitable temperature of 550-640°C
5.keep the material out of the furnace ,then cool in the air
Mechanical Property( for reference only)
1.Tensile strength: 980MPa
2.Yield point: 790MPa
3.Percentage reduction of area after fracture: 54%
4.Elongation after fracture: 14%
5.Impact test (+20°C): Transverse – 27~32J; Longitud – 45~52J
Delivery Condition
1.Shape:Round/Square / Flat/Shafts/Rollers/Blocks
2.Surface condition:Black surface/Bright surface
3.Heat Treatment:Normalized/Annealed/QT
4.Straightness:Max 3mm/m(Enhanced straightness may be available on request)
5.Length:3000-5800mm suitable for 20″container. above 6000mm,suitable for 40″ container
6.Grain Size: 5-8 acc to ASTM E112-96
7.Ultrasonic Standard: Sep1921/ASTM A388/EN 10228-3
8.Non Metallic Inclusion: 2 max acc to ASTM E45 /K4≤20 acc to DIN 50602
9.Forging Ratio: minimum 4 : 1
10.Marking: Grade/Weight/Length/Size/Heat Number
Quality Certification
A material test report(Inspection Certificate EN 10204 3.1) will be provided, documenting the following:
1.Chemical analysis
2.Mechanical properties
3.Surface hardness
4.Non Metallic Inclusion
5.Heat Treatment Process
6.Grain size
7.Forging ratio
8.NDE test method/criteria
