Stainless Steel 440 F is stocked by 4 North American distributors and produced by 4 large mills. Distributors will offer small quantity buys while mills will generally only sell large quantities, with delivery times anywhere from 10 to 50 weeks depending on size and form required
This material is stocked primarily in Bar Products by 3 distributors but is also available to a lesser extent in Wire Products, Forging Products, and Tubular Products.
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Specifications
The following specifications cover Stainless Steel 440 F
- AISI 440F
- AMS 5632
- UNS S44020
Property Results
Chemistry Data : [top]
Carbon
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0.95 - 1.2 |
Chromium
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16 - 18 |
Iron
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Balance |
Manganese
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1.25 max |
Molybdenum
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0.4 - 0.6 |
Nickel
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0.75 max |
Phosphorus
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0.04 max |
Silicon
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1 max |
Sulphur
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0.1 - 0.35 |
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Principal Design Features
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This alloy is a free machining, high carbon, heat treatable metal combining elevated hardness and moderate corrosion resistance.
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Applications
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Commonly employed in applications requiring high hardness values, non-galling and non-seizing properties in a free machining steel. Due to its inherent porosity, it should not be considered for applications involving gas or liquid under pressure.
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Machinability
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Due to its' high sulfur content, this alloy can be readily machined using all common methods. Sulfur causes easy chip breakage and acts as a lubricant during machining.
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Welding
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Not recommended for welding .
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Hot Working
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Similar in characteristics to high speed tool steel. Heat to 1400-1500 F(760-816 C), then on to 1900-2100 F(1038-1149 C) slowly. Finish at 1700 F(927 C), furnace cool and anneal fully after reaching room temperature for maximum properties.
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Cold Working
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Not generally used in forming operations, this alloy can withstand moderate deformation in the fully annealed condition.
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Annealing
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Soak at 1550-1600 F(843-871 C), furnace cool.
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Tempering
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For maximum hardness, soak 1 hour at 300-350 F(149-177 C). This will yield Rc 56 minimum.
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Hardening
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Soak at 1850-1950 F(1010-1066 C), air cool or warm oil quench.
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Physical Data : [top]
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Density (lb / cu. in.)
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0.275
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Specific Gravity
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7.6
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Specific Heat (Btu/lb/Deg F - [32-212 Deg F])
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0.11
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Electrical Resistivity (microhm-cm (at 68 Deg F))
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361
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Melting Point (Deg F)
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2700
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Modulus of Elasticity Tension
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29
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Mechanical Data : [top]
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MSO currently has no data available for this grade.
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Videos :
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MSO currently has no videos available for this grade.
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Disclaimer
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