8620 Steel Machining

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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