Why Companies Should Know About SCM 415 Steel
It is important to understand SCM 415 steel to fulfill the needs of high-performance materials. SCM415 steel is an alloy steel known for its excellent strength, toughness & wear resistance. It is used in automotive components, gears, shafts & other critical parts requiring reliable mechanical properties. Getting information about SCM 415 will help companies to make informed decisions about heat treatment, machining compatibility & long-term performance. SCM 415 alloy steel offers both durability & cost-efficiency for various industrial applications.
What is SCM 415 Steel Material?
SCM415 is a type of chromium-molybdenum alloy steel listed under JIS G4053 standards. This material has good strength, toughness & resistance to wear. This steel is often used to make parts like gears, shafts & automotive components especially when both hard surface & strong inner core are needed. Chromium in SCM415 helps protect against rust & molybdenum improves strength at high temperatures. It is also suitable for heat treatments like carburizing & quenching to improve its hardness & durability. If you’re making mechanical or precision parts, SCM415 steel is a reliable choice for both performance and ease of use.
SCM415 Alloy Steel: Chemical Elements
The SCM415 chemical composition classifies it as a medium carbon steel by containing carbon content usually between 0.35% & 0.45%. Chromium improves corrosion resistance & molybdenum boosts strength at high temperatures to increase hardenability. Manganese helps with deoxidation and boosts hardenability, while silicon enhances strength and flexibility. This balanced SCM415 chemical composition makes it ideal for applications requiring durability, toughness & resistance to wear in challenging environments.
| Carbon ( C ) | 0.38～0.43% |
| Manganese | 0.75～1.00% |
| Phosphorus | ≤0.035% |
| Sulfur | ≤0.040% |
| Chromium | 1.10% |
| Molybdenum | 0.15～0.25% |
| Iron | 97.25% |
Understanding SCM415 Steel Equivalents
SCM415 is equivalent to AISI 4135 and 4137 alloy steels, sharing similar chemical compositions and mechanical properties. These equivalents offer comparable strength, toughness, and heat treatment capabilities for various engineering applications.
| Japan | China | France | Italy | Germany | England |
| JIS | GB | AFNOR | UNI | DIN,WNr | BS |
| SCM415 | 15CrMo | 15CD4.05 | X30WCRV93KU | 15CrMO I 1.7262 | 1501-620 | Cr31 |
Key Mechanical Properties of SCM415 Steel
SCM415 steel combines high tensile and yield strength with good toughness, making it ideal for parts exposed to heavy loads and dynamic stress. It also holds up well under high temperatures, making it suitable for demanding environments.
| Typical steel Elastic modulus | Bulk modulus | Tensile strengtd | Yield strengtd |
| GPa | GPa | Mpa | Mpa |
| 190-210 | 140 | 655 | 415 |
Understanding the Hardness of SCM415 Steel
SCM415 steel is known for its high hardness, which can be increased even more with heat treatment. The hardness of SCM415 varies depending on its condition, as outlined below:
| Condition | Hardness (HRC) |
| Annealed | 15-20 |
| Quenched & Tempered | 55-60 |
| Carburized & Hardened | 60-65 |
Know About Physical Properties of SCM415 Steel
The density of SCM415 reflects its solid and heavy nature, contributing to its overall strength and durability. With moderate thermal conductivity, SCM415 efficiently manages heat transfer making it suitable for applications that require controlled heat dissipation. Additionally, its notable specific heat capacity influences how the material reacts to temperature changes during manufacturing and use, ensuring reliable performance under varying thermal conditions.
| Specific heat J/kgK | Temperature T °C/F | Thermal conductivity W/mK | Modulus of elasticity kN/mm2 |
| 43 | 44 | 14 | 321 |
Annealing Process of SCM415 Alloy Steel
Annealing SCM415 alloy steel involves heating the material to a specific temperature holding it there to relieve internal stresses & then cooling it slowly to improve its ductility & machinability. This process enhances the material workability & prepares it for further processing
| Process Step | Temperature Range | Cooling Method |
| Heating | 800-850°C | Furnace cooling |
| Holding | At temperature | Hold for 1-2 hours |
| Cooling | Slow cooling | In the furnace |
How SCM415 Steel Performs Against Corrosion?
SCM415 offers moderate corrosion resistance due to its chromium content, making it suitable for mildly aggressive environments. However, in areas with chlorides or acidic chemicals like sulfuric acid, protective coatings or treatments are advised, as the steel can be prone to stress corrosion cracking (SCC).
| Corrosive Agent | Concentration (%) | Temperature (°C/°F) | Resistance Rating | Notes |
| Chlorides | 3-5 | 25-60 °C / 77-140 °F | Fair | Risk of pitting |
| Sulfuric Acid | 10-20 | 25-50 °C / 77-122 °F | Poor | Susceptible to SCC |
| Sea Water | – | 25 °C / 77 °F | Fair | Moderate resistance |
| Alkaline Solutions | 1-5 | 25-60 °C / 77-140 °F | Good | Generally resistant |
How SCM415 Steel Performs Under High Temperatures?
SCM415 retains its strength and toughness at elevated temperatures. Its good creep resistance makes it a reliable choice for applications under constant high heat, such as in power plants or aerospace parts. However, oxidation can occur if it’s exposed to air at very high temperatures, so surface protection is recommended.Fabrication Properties of SCM415 Steel
SCM415 offers moderate weldability with preheating recommended for thick sections. It has decent machinability using carbide or HSS tools, and good formability, especially under hot working conditions. Suitable for heat treatments like carburizing and quenching to enhance hardness and performance.
Understanding the Weldability of SCM415 Alloy Steel
While SCM415 is generally weldable, preheating is recommended—especially for thick sections—to prevent cracking. Post-weld heat treatment (PWHT) helps improve weld integrity and reduce stress in the heat-affected zones.
| Welding Process | Recommended Filler Metal (AWS Classification) | Typical Shielding Gas/Flux | Notes |
| MIG | ER70S-6 | Argon + CO2 | Preheat recommended |
| TIG | ER80S-Ni1 | Argon | Post-weld heat treatment may be necessary |
| Stick | E7018 | – | Requires careful control to avoid cracking |
How Machinable Is SCM415 Alloy Steel?
SCM415 is not as easy to machine as free-cutting steels like AISI 1212, but it still performs well under proper conditions. Using high-speed steel (HSS) or carbide tools with sufficient lubrication and cooling enhances results and tool life.
| Machining Parameter | SCM415 | AISI 1212 | Notes/Tips |
| Relative Machinability Index | 60% | 100% | SCM415 is more challenging to machine |
| Typical Cutting Speed (Turning) | 40 m/min | 80 m/min | Use carbide tools for best results |
Exploring the Formability of SCM415 Alloy Steel
SCM415 steel can be hot formed easily and can also be cold formed with caution. During cold forming, it’s important to account for work hardening and maintain an appropriate bend radius to avoid material cracking.Heat Treatment Processes for SCM415 Alloy Steel
SCM415 responds well to heat treatment especially through quenching & tempering. Quenching transforms its microstructure into hard martensite to boost surface hardness. Tempering follows to relieve internal stresses, reduce brittleness & improve toughness making it ideal for demanding, high-stress industrial applications.|
Treatment Process |
Temperature Range (°C/°F) |
Typical Soaking Time |
Cooling Method |
Primary Purpose / Expected Result |
|
Annealing |
600 – 700 °C / 1112 – 1292 °F |
1 – 2 hours |
Air |
Softening, improved machinability |
|
Quenching |
850 – 900 °C / 1562 – 1652 °F |
30 minutes |
Oil or Water |
Hardening, increased strength |
|
Tempering |
400 – 600 °C / 752 – 1112 °F |
1 hour |
Air |
Reducing brittleness, improving toughness |
SCM415 Steel Industrial Applications
SCM415 is widely used in heavy machinery parts, fasteners, and tooling due to its high strength and wear resistance. Its toughness makes it ideal for high-stress and abrasive industrial applications.|
Industry/Sector |
Specific Application Example |
Key Steel Properties Utilized in this Application |
Reason for Selection (Brief) |
|
Automotive |
Gears |
High strength, wear resistance |
Essential for durability |
|
Aerospace |
Aircraft components |
Lightweight, high strength |
Critical for performance |
|
Oil & Gas |
Drill bits |
Toughness, resistance to wear |
Required for harsh conditions |
|
Machinery |
Shafts |
High tensile strength |
Necessary for load-bearing |
Conclusion
In conclusion, SCM415 steel is a highly versatile alloy known for its excellent strength, toughness & wear resistance for making it ideal for demanding industrial applications. At Kalpatru Piping Solutions, we provide premium SCM415 material that can be customized through advanced heat treatment & processing to meet your project specific needs. Whether you require SCM415 steel for applications, our quality products ensure reliable performance and durability. Understanding the unique benefits of SCM415 allows you to select the best material for your applications with confidence. Trust Kalpatru Piping for top-grade SCM 415 steel solutions tailored to your requirements.
Frequently Asked Question About SCM415 Steel
What is the hardness of SCM415 HRc?
After heat treatment, SCM415 typically achieves a hardness between 55 & 60 HRC.
What is the difference between S45C and SCM415?
S45C is a medium carbon steel that has good machinability & strength & is used in general engineering. SCM415, on the other hand, is a chromium-molybdenum alloy steel with higher hardenability and toughness to make it better suited for gears, shafts & wear-resistant parts.
What is SCM435 steel equivalent to?
SCM415 steel is equivalent to the AISI 4135 grade.
What is the density of SCM415 material?
The density of SCM415 is approximately 7.8 to 7.9 , which is typical for low alloy steels primarily made of iron.
