4130 Steel Machining

Steel 4130

Steel alloy 4130 is a strong, versatile alloy, ideal for parts that require strength, toughness, and fatigue resistance. Due to its excellent weldability and ease of fabrication, it is often used for military and commercial aircraft parts. 4130 has considerable atmospheric corrosion resistance.

4130 has a machining cost factor of 2.7 when compared to steel 12L14. It has exceptional welding and forming properties and can also be forged, cold and hot worked, annealed, and tempered. 4130 is a through hardened alloy and should not be case hardened.

Industries & Applications

  • Tooling
  • Valve components
  • Automotive parts
  • Aircraft components
  • Aerospace Parts

Steel Parts Gallery

Steel 4130 Characteristics

TEMPER Yield Strength (ksi) Ultimate Tensile Strength (ksi) Modulus of Elasticity (ksi) Brinell Hardness (500km/10mm)

Annealed

67

81

30,000

220

Quenched and Tempered

140

150

30,000

300

Normalized

64

97

30,000

200

 

Steel Cost Comparison

Type General Characteristics Alloy Common Applications Tolerances for a 1/2" Dia. Bar Material Cost Factor Machining Cost Factor
Steel
Strength, toughness, and fatigue resistance
4130
Military and commercial aircraft parts
Norm AQ
HT Condition F4
1.5
2
2.7
--

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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