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Alloy Steel 8620
Material Type
Metal
Material Name
Alloy Steel 8620
Alternative Names
G86200 | 1.6523
Process Compatibility
CNC Milling, CNC Turning
introduction
Alloy Steel 8620 in CNC Machining
Alloy steel 8620 is a low-alloy steel containing nickel, chromium, and molybdenum with high strength and toughness. It is a commonly used steel that can be carburized.
We offer Alloy 8620 in various forms, such as bars, tubes, and plates. It has a hard outer layer and a durable, ductile core that undergoes minimal distortion during heat treatment. It is flexible during hardening, allowing for the enhancement of case/core properties. When CNC machining Alloy Steel 8620, we consider cutting speeds, feeds, and tool materials. Carbide tools are often preferred for their durability. Proper lubrication during machining helps improve surface finish and tool life.
Alloy steel 8620 is improved through heat treatments. We can forge it quickly and then normalize it for better machining. We can also fully anneal it before machining, followed by case hardening and immediate tempering. Tempering at 150℃ – 200℃ enhances toughness without much impact on strength. For carburizing, we heat at 900℃ – 925℃ and follow with a tailored hardening and tempering cycle for optimal properties.
Properties
Properties Table of Alloy Steel 8620
| MECHANICAL PROPERTIES | |
|---|---|
| Ultimate Tensile Strength | 530 MPa(77,000 psi) |
| Yield Strength | 385 MPa(55,800 psi) |
| Young's Modulus(Elasticity) | 205 GPa(29,700 ksi) |
| Elongation at Break | 20% |
| Physical Properties | |
| Corrosion Resistance | Moderate corrosion resistance, susceptible to corrosion in certain environments |
| Magnetism | Ferromagnetic |
| UV Resistance | Limited UV resistance |
| Weldability | Good weldability with proper pre-weld and post-weld procedures |
| Thermal Properties | |
| Maximum Service Temperature | Approximately 500°C(932°F) |
| Thermal Expansion Coefficient | 11.7 x 10^-6/°C(20-100°C) |
| Thermal Conductivity | 46.6 W/m·K(20°C) |
| Electrical Properties | |
| Electrical Resistivity | ~7.6 x 10^-7 ohm.m |
| ESD Safety | Conductive |
TECHNOLOGY OVERVIEW
Basic Knowledge of Alloy Steel 8620
What is Alloy Steel 8620?
Alloy Steel 8620 is a carburizing alloy with excellent hardenability and case-hardening properties. It is composed of around 0.2-0.5% carbon, 0.5-0.7% manganese, 0.4-0.7% chromium, 0.4-0.6% molybdenum, and 0.4-0.7% nickel. Its low carbon content makes it suitable for welding.
The nickel content enhances toughness, while chromium and molybdenum contribute to its wear resistance and strength. It is widely used in various industries because of its cost-effectiveness and superior quality.
Advantages of Alloy Steel 8620
- Excellent hardenability
- High strength and toughness
- Versatility for various applications
- Suitable for gears, crankshafts, and heavy-duty machinery components
- Case-hardening ability enhances wear resistance
- Durable performance in demanding conditions
Applications of Alloy Steel 8620
- Gears for automotive and industrial machinery
- Camshafts in engine systems
- Axles for automotive and machinery
- Fasteners such as bolts and nuts
- Aircraft parts requiring high strength and toughness
FAQ
Machining Alloy Steel 8620 Buying FAQ
4140 alloy steel and 8620 steel differ in carbon content, with 8620 having slightly less and containing nickel. Both share similar amounts of chromium and molybdenum. 8620 steel is well-suited for carburization case hardening.
When welding 8620 using TIG, consider using "oxweld" or ER 70S-2. The CNC'd "teeth" aid alignment, reducing the needed heat input during welding. Welding 8620 steel typically requires preheating and post-weld heat treatment to minimize the risk of cracking. Gas tungsten arc welding (GTAW) or shielded metal arc welding (SMAW) with appropriate filler materials can also be used.
Typical heat treatments for 8620 include normalizing, annealing, and case hardening processes like carburizing and hardening.
Other Materials
Alloy Steel 4140
Alloy Steel 4140, also known as chromoly steel, is a versatile low-alloy steel that contains chromium, molybdenum, and manganese.
More info about Alloy Steel 4140
Alloy Steel 4130
Alloy steel 4130 is a versatile and widely used material in CNC machining, particularly in the aerospace and automotive industries.
More info about Alloy Steel 4130
Alloy Steel 1215
Alloy Steel 1215 is not a common alloy steel. It is a resulfurized and rephosphorized steel known as free machining steel.
More info about Alloy Steel 1215
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