Chemical Composition
Carbon: 0.40%-0.48%
Manganese: 1.35%-1.65%
Phosphorus: 0.040% Max
Sulphur: 0.24%-0.33%
Silicon: 0.15%-0.35%
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A311 Cold Finish Bar - Class B StressProof®
A311 Class B StressProof® Cold Finished Steel Bar is produced using a proprietary process that draws the bar through a special die under heavy draft. A311 Stressproof® Bar is a medium carbon free machining steel. The bar is then stress relieved in a precisely controlled furnace. The result is a steel bar product that meets stringent standards that provide a wide variety of benefits, including:
- Improved wearability without case hardening
- Strength without heat treating
- Exceptional surface quality
- Excellent machinability
- Extended tool life
- Resistance to fatigue and stress
- Balanced working
- Minimized warpage and distortion
- Controlled low stresses
Alro also stocks:
A311 Class B StressProof® TG&P
StressProof® is electro-magnetically tested using eddy currents. Although it also can be induction hardened, it should be watched for quench cracks.
StressProof® is a trademark of the LaSalle Steel Corporation. www.niagaralasalle.com
Properties
Tensile Strength: 115,000 psi (Min)
Yield Strength: 100,000 psi (Min)
Elongation: 8% (7% Min above 3 in)
Typical Uses
Typical uses for A311 Class B StressProof® include:
- Arbors
- Keyed Shafts
- Motor Shafts
- Splined Shafts
- Drive-Shafts
- Armature Shafts
- Gears
- Sleeves
- Lead Screws
- Link Pins
- Collets
- Bushings
- Boring Bars
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