25CrMo4/1.7218/SCM430 Alloy Steel
EN 10083-3: 2006 Steels for quenching and tempering. Technical delivery conditions for alloy steels
EN 10132-3: 2000 Cold rolled narrow steel strip for heat treatment. Technical delivery conditions. Steels for quenching and tempering
EN 10216-2: 2014 Seamless steel tubes for pressure purposes. Technical delivery conditions. Non-alloy and alloy steel tubes with specified elevated temperature properties
EN 10305-1: 2010 Steel tubes for precision applications. Seamless cold drawn tubes. Technical delivery conditions
EN 10269: 1999 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
EN 10263-4: 2001 Steel rod, bars and wire for cold heading and cold extrusion. Technical delivery conditions for steels for quenching and tempering
EN 10250-3: 2000 Open steel die forgings for general engineering purposes. Alloy special steel
EN 10297-1: 2003 Seamless circular steel tubes for mechanical and general engineering purposes. Non-alloy and alloy steel tubes. Technical delivery conditions
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 |
Equivalent Grades of Steel 25CrMo4(1.7218)
| 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 |
Description of Steel 25CrMo4(1.7218)
25CrMo4 is a heat-resistant, heat-treatable steel grade that is often used for components with high loads in motorsport, industry and in aviation. Among other things, screws, crankshafts, roll cages, chassis components and vehicle frames are made from this. Due to its chemical composition, 25CrMo4 is suitable for hardening and has a tensile strength of over 650 N / mm² in the tempered state. 25CrMo4 is valued for its good weldability and bendability.It has excellent hardenability and tempering properties by adding proper Cr, Mo and other alloy elements.Through suitable tempering treatment,it maintains high strength and high toughness,as well as high temperature resistance,wear-resistant properties. 25CrMo4 Steel is suitable for the parts which serve in a complex environment.
Size Tolerance
| Surface Finish | Size Tolerance | Length |
| Black For Forged condition | (0，+5mm) | Multiple Length/Fixed Length |
| Black For Rolled condition | (0，+1mm) | |
| Rough Turned | (0，+3mm) |
Mechanical properties of Steel 25CrMo4(1.7218)
Tensile Strength:min 740 N/mm2
Yield Strength:min. 590 N/mm2
Elongation:min.15 %(l)
Kv-Imapct value:min.80J (l)
Heat Treatment Conditions
| Heat Treatment Process | Temperature Range | Cooling Method |
|---|---|---|
| Normalizing | 860-900°C | Slow cooling in air |
| Soft Annealing | 680-720°C | Slow cooling in furnace |
| Stress Relieving | 525-620°C | Air cooling |
| Hardening | 840-880°C | Oil or water quenching |
| Tempering | 540-680°C | Air cooling |
| Product Type | Material Grades | Specification |
|---|---|---|
| Hot-Rolled Bars | 25CrMo4, 1.7218 | Peeled, Bright and Drawn |
| Forged Bars/Open-Die Forgings | 25CrMo4, 1.7218 | N/A |
| Cold Drawn Tubes | AISI 4130, 25CrMo4, 1.7218 | N/A |
| Cold Rolled Strips | 25CrMo4, 1.7218 | N/A |
| Sheets and Plates | AISI 4130, 25CrMo4, 1.7218 | N/A |
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