AISI SAE 8620 Price Per Kg Alloy Gear Steel Round Rod Bar for power parts
1. Applications:
When hardened and formed, 8620 gear steel may be used to produce hard wearing machine parts in a wide variety of industries. With its combination of elements along with the ease with which it may be processed, 8620 gear steel is a good choice for a variety of applications. Carburized 8620 gear steel is strong and durable and as a result is preferred in certain manufacturing applications. It is used to make a wide range of gears, crankshafts, gear rings, pinions, piston pins, cams, gauges, tie bars, collets, bushings and bolting as well as hand tools and a multitude of machinery parts and components. Structural parts such as gears, pinions, spline shafts, pins and a variety of other important applications requiring a hard wear surface and a ductile core.
2. Quality Standard:
ASTM A29 Standard Specification Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements
EN 10277 Bright steel products.
EN 10278 Dimensions and tolerances of bright steel products
3. Chemical component(%):
| Steel Grade | C | Mn | Si | P | S | Cr | Ni | Mo |
| 8620 | 0.18-0.23 | 0.70-0.90 | 0.15-0.35 | 0.030 max | 0.040 max | 0.40-0.60 | 0.40-0.70 | 0.15-0.25 |
4. Heat Treatment:
This 8620 gear steel may be hardened by heating to 1500F followed by a water quench. Carburize at 1650F to 1700F in an appropriate carburizing medium and oil quench to harden. Improved carburized case and core properties can be obtained by furnace cooling from carburizing at 1650F-1700F and then reheating to 1575F.
5. Machinability:
Machining is done prior to carburizing to within as close a tolerance as possible. Finish machining, after heat treatment and/or carburizing, should be at a minimum so as not to impair the hardened case of the part. Machining may be done by conventional means prior to heat treatment – after carburizing machining is usually limited to grinding.
6. Characteristics
8620 gear steel is a low carbon nickel chromium molybdenum alloy steel. And it is a low cost steel with good carburized properties. The nickel content contributes to case toughness at high strength with above average core toughness. The chromium and molybdenum support the proper formation of carbides resulting in good surface hardness and wear. It is the most widely used carburizing alloy.
