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4140 Steel Machining

Steel 4140 Machined Parts

Sunhy has a reputation for machining quality parts from 4140 Steel. We can machine intricate parts on our CNC Swiss machines and CNC turning centers.

Steel alloy 4140 cold roll is a popular general-purpose alloy, ideal for parts that require high tensile strength and toughness. It has considerable atmospheric corrosion and wear resistance, and will not become brittle.

4140 has a machining cost factor of 2.9 when compared to steel 12L14. It is not ideal for welding due to its lead content. It is often used for forging, responds very well to heat treatment, and can be annealed.

Industries & Applications

Steel 4140 Machining Capabilities

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Steel Cost Comparison

Type	General Characteristics	Alloy	Common Applications	Tolerances for 1/2" Dia.	Material Cost Factor	Machining Cost Factor	Request a Quote
Steel	Popular general-purpose alloy. Direct hardening	4140 or 4142	Gears, shafts, pins, bolts and nuts, pump and valve components	Cold drawn 0	1.1	2.9	Quote >>

Common Material Cost Comparison

Type	General Characteristics	Alloy	Common Applications	Tolerances for 1/2" Dia.	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 material	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	Designed for machining	2011	Electronic hardware, endless commercial products	Cold finish +/-.0015	3.8	.6
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