Steel 8620
Steel alloy 8620 is a popular carburizing alloy, ideal for parts that require both toughness and ductility. It has very high external and internal strength, making it extremely wear resistant. Extensive surface carving is not ideal for 8620; however, it responds well to polishing.
8620 has a machining cost factor of 2.9 when compared to steel 12L14. It can be readily formed, welded, forged, hot and cold worked, annealed, and tempered. When case hardened, 8620 develops a hard outer case with a soft, flexible core.
Industries & Applications
- Shafts
- Bushings
- Pins
- Gears
- Bolts
Steel Parts Gallery
Steel 8620 Characteristics
| TEMPER | Yield Strength (ksi) | Ultimate Tensile Strength (ksi) | Modulus of Elasticity (ksi) | Brinell Hardness (500km/10mm) |
|
Annealed |
57 |
78 |
30,000 |
150 |
|
Normalized |
52 |
93 |
30,000 |
180 |
Steel Cost Comparison
| Type | General Characteristics | Alloy | Common Applications | Tolerances for a 1/2" Dia. Bar | Material Cost Factor | Machining Cost Factor |
|---|---|---|---|---|---|---|
| Steel |
.55% Ni, .50% Cr, .20% Mo, heat treatable and case hardening
|
8620 |
Shafts, bushings, pins, gears, bolts
|
Cold drawn 0 |
2.5 | 2.9 |
Common Material Cost Comparison
| Type | General Characteristics | Alloy | Common Applications | Tolerances for a 1/2" Dia. Bar | Material Cost Factor | Machining Cost Factor |
|---|---|---|---|---|---|---|
| Steel |
Designed for excellent machinability. Case hard only
|
12L14 |
Endless commercial products; probably more pounds used in turned products than any other bar stock
|
Cold drawn 0 |
1 | 1 |
| Stainless Steel |
Designed for machining, non-magnetic
|
303 |
Electronic hardware, automotive, aerospace, medical instruments, and many applications requiring corrosion resistance
|
Cold finished +/- .002 |
1.9 | 2.7 |
| Brass |
Strength, corrosion and wear resistance, and excellent machinability
|
C35300 |
Well suited for parts with knurling or threading
|
+0015 | 3.5 | .07 |
| Aluminum |
Designed for machining
|
2011 |
Electronic hardware, endless commercial products
|
Cold finish +/-.0015 |
3.8 | .6 |
| Titanium |
High strength, light weight, good bio-compatibility
|
Ti-6Al-4VEli |
Medical implants
|
Ground & polished +/-.002 |
30.2 | 6 |
To review our Machining Materials Guide, please click here.
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