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Grade T304 and 304L
The most widely used of the austenitic grades, T-304 offers good corrosion resistance to many chemicals and industrial atmospheres. Generally considered non-magnetic, it can become slightly magnetic when cold-worked. T-304 is non-hardenable by heat treatment. In 304L, the carbon content has been lowered to .03% max. for corrosion resistance at heat affected zones from welding.
TYPICAL APPLICATIONS
Architectural trim, beer barrels, cryogenic vessels, dairy equipment, and a wide variety of most food applications.
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TYPICAL ANALYSIS |
304 |
304L |
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Chrome |
18.00-20.00 |
18.00-20.00 |
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Nickel |
8.00-11.00 |
8.00-11.00 |
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Carbon |
.08 MAX. |
.03 MAX. |
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Manganese |
2.0 MAX. |
2.0 MAX. |
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Silicon |
1.0 MAX. |
1.0 MAX. |
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Molybdenum |
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Other |
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MECHANICAL PROPERTIES
(ANNEALED)
BRINELL HARDNESS |
170 |
160 |
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TENSILE-KSI |
85 |
75 |
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YIELD-KSI |
34 |
30 |
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ELONGATION IN 2-% |
60 |
60 |
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RED. IN AREA-% MIN |
70 |
- |
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WELDING CHARACTERISTICS |
Very good - tough welds |
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MACHINING
COMPARED TO B1112
SCREW STOCK |
45% |
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SPECIFICATIONS
AISI |
304 (BAR) |
304L (BAR) |
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ASTM |
A276, A479, |
A276, A479 |
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A580 |
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AMS |
5639 |
5647 |
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QQS |
763 |
763 |
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AISI |
304 (SHEET) |
304 (PLATE) |
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ASTM |
A240 |
A240 |
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AMS |
5513 |
5513 |
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