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| III.
rolled carbon spring steel, cast or heat chemical
ranges and limits.
Standard chemical ranges and limits, percent
Lowest
When
of specified
Element
Range
element
Carbon
Over 0.60 t o 0.80
0.11
0.60
Note
Over
to 1.35
Manganese
To 0.50
0.20
0.40
Over 0.50 to 1.15
over 1.15 to 1.65
Phosphorus
To 0.08
0.03
0.04
Over 0.08 to 0.15
To 0.08
0.05
Over 0.08 to C.15 fncl.
l 05
Over
to
l 07
Over
to
l
Silicon
0.10
To 0.15
0.08
Over 0.15 to 0.30
Over
to . 60
Copper
When copper is required
0.20 minimum is
specified
The carbon ranges shown in the column headed "Range" apply
Note 1. Carbon:
when the specified maximum limit for manganese does not
exceed 1.00 percent. When the maximum manganese
exceeds 1.00 percent, add 0.01 to the carbon rangaes shown
above.
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