Stainless Steel 431 is stocked by 15 North American distributors and produced by 20 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 13 distributors but is also available to a lesser extent in Wire Products, Flat Rolled Products, Forging Products, and Tubular Products.
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Specifications
The following specifications cover Stainless Steel 431
- AISI 431
- AMS 5628
- ASTM A276
- ASTM A473
- ASTM A493
- ASTM A511
- ASTM A579
- ASTM A580
- DIN 1.4057
- MIL S-18732
- MIL S-8967
- UNS S43100
Property Results
Chemistry Data : [top]
Carbon
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0.2 max |
Chromium
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15 - 17 |
Iron
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Balance |
Manganese
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1 max |
Nickel
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1.25 - 2.5 |
Phosphorus
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0.04 max |
Silicon
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1 max |
Sulphur
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0.03 max |
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Principal Design Features
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431 is a martensitic stainless combining excellent impact strength at high hardness levels with the best corrosion resistance of any martensitic stainless steels.
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Applications
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431 has been successfully used in a variety of aircraft and general industrial applications. These include fasteners, bolts, valve components and chemical equipment.
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Machinability
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In the fully annealed condition, 431 will gall and build up on the tools. Good surface finishes are not easily obtained.
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Welding
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Most electric welding procedures have proven successful with 431 stainless. Filler metal should be AWS E/ER410.To avoid cracking, pre-heat the workpiece to 400-600 F (204-316 C). After air cooling, treat at 1200 F (649 C) to reattain maximum properties.
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Hot Working
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Heat to 2100-2200 F (1149-1204 C) for best results. Do not work material below 1650 F (900 C).
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Cold Working
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This alloy is easily drawn, spun, headed, sheared and bent compared with other stainless steels.
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Annealing
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1200-1250 F (650-677 C), furnace or air cool.
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Tempering
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Temper for desired properties. Temperatures between 700-1050 F (371-565 C) will adversely affect impact strength and corrosion properties.
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Hardening
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1800-1950 F (982-1066 C), oil quench or ail cool for maximum properties.
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Physical Data : [top]
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Density (lb / cu. in.)
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0.28
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Specific Gravity
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7.75
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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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432
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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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This publication may include technical inaccuracies or typographical errors. Changes may be periodically made to the information herein.
