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Common Steel Grades Chart

Common Steel Grades

Steel is one of the best and most commonly used materials for precision machined parts.

Like most materials, there are 100s of different steel alloys, each with slightly different compositions and use cases. But, not every steel alloy is great for precision machined parts. Out of the 100s of different alloys, the majority of steel parts are made from a few alloys, and a few more are used for specialty parts.

Spex uses about 15 different steel alloys to machine precision parts for a wide variety of industries. The cost efficiency and strength of steel make it the ideal choice for CNC machined parts

This chart gives you a brief overview of the most common steel alloys, their costs, and common uses for each.

Common grades of steel

AISI Grade Material Cost Machining Cost Common Uses
1008
Low
Medium
Pins, Rivets, Spacers, Shafts, Gears
1018
Low
Medium-Low
Pins, Rivets, Spacers, Shafts, Gears
1045
Low
Medium
Rods, Bolts, Gears
1137
Low
Medium-Low
Gears, Shafts, Nuts, Bolts
1215
Low
Low
Pins, Fittings, Bushings, Inserts, Couplings
11L37
Medium
Low
Nuts, Bolts, Gears, Shafts
11L41
Medium-Low
Medium-Low
Axles, Pins, Bolts, Shafts
12L14
Low
Low
Couplings, Fittings, Bushings, Shafts, Inserts
4130
Low
Medium
Tooling, Valves, Automotive parts, Aircraft parts
4140
Low
Medium
Nuts, Bolts, Gears, Shafts, Pins, Pump and valve components
8620
Medium-Low
Medium
Bolts, Gears, Bushings, Pins, Shafts
A2
Medium
Medium-Low
Machine Parts, Cutting Tools, Gauges, Dies
M2
Medium
Medium
Broaches, Cutting Tools, Screws,
M35
Medium
Medium
Cutting Tools, Broaches,
M42
Medium
Medium-High
Cutting Tools, Broaches, Gear Cutters

Spex is an ISO 9001:2015 certified company. Organizations use this standard to demonstrate the ability to consistently provide products and services that meet customer and regulatory requirements.

We incorporate world-class excellence in every step of the process, in our ongoing efforts to ensure your success.

Reach out to our team to get a quote for CNC machined steel parts for your next project. 

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