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Grade T303
Type 303 is a free-machining variation of T-304. The addition of sulfur for better machinability makes this a favorite for use in automatic screw machines. Corrosion resistant to atmospheric exposures, as well as a wide range of chemicals; most dyes, foods and nitric acid.
TYPICAL APPLICATIONS
Bolts, bushings, nuts, shafts, and parts produced on automatic screw machines.
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TYPICAL ANALYSIS |
303 |
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Chrome |
17.0-19.0 |
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Nickel |
8.0-10.0 |
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Carbon |
.15 MAX. |
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Manganese |
2.00 MAX. |
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Silicon |
1.00 MAX. |
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Molybdenum |
.60 MAX. |
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Sulfur |
.15 MIN. |
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MECHANICAL PROPERTIES (ANNEALED)
BRINELL HARDNESS |
160 |
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TENSILE-KSI |
90 |
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YIELD-KSI |
35 |
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ELONGATION IN 2-% |
50 |
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RED. IN AREA-% MIN |
55 |
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WELDING CHARACTERISTICS |
Fusion welding
not recommended |
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MACHINING
COMPARED TO B1112
SCREW STOCK |
70% |
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SPECIFICATIONS
AISI |
303 (BAR)
303 |
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ASTM |
A581, A582 |
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AMS |
5640 |
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