Stainless Steel Alloy 440
Stainless steel alloy 440 is a high-carbon alloy, ideal for parts that require hardness and strength. It has the highest wear resistance, hardness, and strength of any stainless steel alloy. 440 is not recommended for elevated temperatures or environments that may have severe corrosion.
440 has a machining cost factor of 6.3 when compared to steel 12L14. It is not ideal for welding or forming. 440 can be forged, heat treated, and annealed.
Industries & Applications
- Pins
- Bearings
- Surgical and dental parts
- Valve components
Stainless Steel Parts Gallery
Stainless Steel 440 Characteristics
|
TEMPER |
Yield Strength |
Ultimate Tensile Strength |
Modulus of Elasticity |
Brinell Hardness (500kg/10mm) |
|
A |
60-240 |
105-260 |
30,000 |
95 |
|
C |
65-280 |
110-290 |
30,000 |
100 |
Stainless Steel Cost Comparison
| Type | General Characteristics | Alloy | Common Applications | Tolerances for a 1/2" Dia. Bar | Material Cost Factor | Machining Cost Factor |
|---|---|---|---|---|---|---|
| Stainless Steel |
High carbon, can harden to RC 60
|
440 |
Applications requiring stainless steel with highest hardness
|
5.9 | 5.0 |
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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