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Stainless Steel Screw Machining

CNC Machining

stainless steel screw machined partAlthough machining custom stainless steel parts is highly challenging, customers cannot afford unacceptable delivery delays. Mastering technical challenges while maintaining an uninterrupted reliable supply is an important core competency at Cox Manufacturing. The Cox team of manufacturing professionals know the distinctive properties of all the 150 different metal alloys in the Stainless category, and adjust the production process to maximize production efficiency.

Stainless Steel Machined Parts

High quality, carefully maintained tooling is a key to successful stainless steel machined parts. This is why Cox maintains a complete in-house tooling capability. Additional benefits come from the extensive selection of automated machining equipment at Cox (including CNC Swiss, multi-spindle and CNC milling equipment under Esprit CAD/CAM control.)

All these advantages, combined with 50+ years of expertise machining stainless steel, make Cox Manufacturing the company you can be confident in to come through on delivery day. Experience the Cox stainless steel advantage for yourself by contacting us on your next component project.

Stainless Steel Machining Characteristics

Stainless Steel Alloy 303
  • Tolerances for a 1/2" Dia. Bar +/- .002 (Cold finished)
  • Material Cost Factor 4.5
  • Machining Cost Factor 2.7

Stainless steel alloy 303 is a non-magnetic alloy designed for machining. It is commonly machined into components for automotive, aerospace, or medical instruments; electronic hardware, or many other applications requiring corrosion resistant components.

Stainless Steel Alloy 304
  • Tolerances for a 1/2" Dia. Bar +/-.002 (Cold finished)
  • Material Cost Factor 3.7
  • Machining Cost Factor 5.0

The stainless steel 304 alloy is designed for better weldability a formability and is slightly more corrosion resistant. Alloy 304 is commonly machined for applications needing more formability or weldability.

Stainless Steel Alloy 316
  • Tolerances for a 1/2" Dia. Bar +/-.002 (Cold finished)
  • Material Cost Factor 4.3
  • Machining Cost Factor 5.6

316 stainless steel is designed for better corrosion resistance. Alloy 316 is often machined for medical implants, surgical instruments, and aerospace parts.

Stainless Steel Alloy 416
  • Tolerances for a 1/2" Dia. Bar +/-.002 (Cold finished- annealed)
  • Material Cost Factor 3.8
  • Machining Cost Factor 2.6

Stainless steel 416 is less corrosion resistant than the 300 series alloy, but it can be heat treated. Machined 416 parts are commonly used where less corrosion resistance is needed, but more hardness is required for a lower cost.

Stainless Steel Alloy 440C
  • Material Cost Factor 5.9
  • Machining Cost Factor 5.0

440C stainless steel alloy is high in carbon and can be hardened to RC 60. Customers choose alloy 440C for applications that require the highest hardness in stainless steel.

Stainless Steel Alloy 17-4 PH
  • Tolerances for a 1/2" Dia. Bar +/-.002
  • Material Cost Factor 4.4
  • Machining Cost Factor 5.0

Stainless steel alloy 17-4 PH is very corrosion resistance and high-heat treatable. Cox machines 17-4 PH for medical and aerospace applications that require excellent corrosion resistance and hardness.


Learn more about the material options available at Cox by choosing from the menu below. For in-depth materials data to support an engineering or product development project, consult our machining materials guide.