Alloy Steel Machining

Alloy Steel Machined Parts

When innovative industries choose to pioneer in the use of new alloys, they call Cox Manufacturing for a very traditional outcome: a consistently reliable supply of top quality components and screw machine parts.

Cox has a reputation for successfully machining the metals other producers prefer not to handle. Customers can confidently design with new materials, secure in the knowledge that Cox can machine even the most exotic, high-temperature alloys for a quality, cost effective result.

Experienced Machining Staff

After 65+ years in the industry, we’ve built a staff of machining and engineering experts who recognize the manufacturing challenges in a new material before they become costly production delays. A complete in-house tooling capability creates customized tools precisely for the properties of the metal being machined.

You are invited to tap into this valuable manufacturability resource at no obligation. Contact us with details on your metal alloy machining application for our expert assistance.

Steel Alloy Machining Characteristics

Steel Alloy 4140 or 4142

  • Tolerances for a 1/2" Dia. Bar +.000/.002 (Cold drawn)
  • Material Cost Factor 1.25
  • Machining Cost Factor 3.0

Steel alloys 4140 & 4142 are commonly machined for higher stress applications that need the strength of an alloy. Direct hardening only.

Steel Alloy 41L40

  • Tolerances for a 1/2" Dia. Bar +.000/-.003 (Cold drawn)
  • Material Cost Factor 1.4
  • Machining Cost Factor 2.7

Steel alloy 41L40 is designed for better machining with lead additive. Direct hardening only. Alloy 41L40 is typically machined into components for higher stress applications.

Steel Alloy 8620

  • Tolerances for a 1/2" Dia. Bar +.000/.002 (Cold drawn)
  • Material Cost Factor 1.8
  • Machining Cost Factor 2.7

Steel alloy 8620 is comprised of .55% Ni, .50% Cr, .20% Mo. Case hardening and heat treatable. Alloy 8620 is machined into parts for higher stress applications which require the strength of an alloy.

Steel Alloy 52100

  • Tolerances for a 1/2" Dia. Bar +/- .006 (Cold finished and spheroidized annealed)
  • Material Cost Factor 2.0
  • Machining Cost Factor 5.1

Steel alloy 52100 is comprised of very high 1% carbon, .25% Ni, 1.4% Cr, .08% Mo. It is commonly machined for bearing applications.


Common Material Cost Comparison

Type General Characteristics Alloy Common Applications Tolerances for 1/2" Dia. Material Cost Factor Machining Cost Factor
Designed for excellent machinability. Case hard only
Endless commercial products; probably more pounds used in turned products than any other material
Cold drawn
1 1
Stainless Steel
Designed for machining, non-magnetic
Electronic hardware, automotive, aerospace, medical instruments, and many applications requiring corrosion resistance
Cold finished
+/- .002
1.9 2.7
Strength, corrosion and wear resistance, and excellent machinability
Well suited for parts with knurling or threading
+0015 3.5 .07
Designed for machining
Electronic hardware, endless commercial products
Cold finish
3.8 .6
High strength, light weight, good bio-compatibility
Medical implants
Ground & polished
30.2 6

To review our Machining Materials Guide, please click here.

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