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Tolerances for Cold Finished Bars ASTM A 108-03 TAB. A 1.1
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Steel bar |
inches / millimeters |
|
Carbon range
max
0,28
% or less |
|
Carbon range
over
0,28
% to
0,55
% incl. |
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|
size |
|
tolerances |
|
tolerances |
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FLATS |
inch |
mm |
|
inch |
mm |
|
inch |
mm |
|
|
< 3/4 |
|
< 19,05 |
- 0,003 |
0,076 |
- 0,004 |
0,102 |
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> 3/4 |
< 1-1/2 |
> 19,05 |
< 38,10 |
- 0,004 |
0,102 |
- 0,005 |
0,127 |
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> 1-1/2 |
< 3 |
> 38,10 |
< 76,20 |
- 0,005 |
0,127 |
- 0,006 |
0,152 |
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> 3 |
< 4 |
> 76,20 |
< 101,6 |
- 0,006 |
0,152 |
- 0,008 |
0,203 |
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> 4 |
< 6 |
> 101,6 |
< 152,4 |
- 0,008 |
0,203 |
- 0,010 |
0,254 |
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> 6 |
|
> 152,4 |
|
- 0,013 |
0,330 |
- 0,015 |
0,381 |
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SQUARES |
inch |
mm |
|
inch |
mm |
|
inch |
mm |
|
|
< 3/4 |
|
< 19,05 |
- 0,002 |
0,051 |
- 0,004 |
0,102 |
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> 3/4 |
< 1-1/2 |
> 19,05 |
< 38,10 |
- 0,003 |
0,076 |
- 0,005 |
0,127 |
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> 1-1/2 |
< 2-1/2 |
> 38,10 |
< 63,50 |
- 0,004 |
0,102 |
- 0,006 |
0,152 |
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> 2-1/2 |
<
4 |
> 63,50 |
< 101,6 |
- 0,006 |
0,152 |
- 0,008 |
0,203 |
|
> 4 |
< 5 |
> 101,6 |
< 127,0 |
- 0,010 |
0,254 |
\ |
\ |
|
> 5 |
< 6 |
> 127,0 |
< 152,4 |
- 0,014 |
0,356 |
\ |
\ |
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HEXAGONS |
inch |
mm |
|
inch |
mm |
|
inch |
mm |
|
|
<
3/4 |
|
< 19,05 |
- 0,002 |
0,051 |
- 0,003 |
0,076 |
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> 3/4 |
< 1-1/2 |
> 19,05 |
< 38,10 |
- 0,003 |
0,076 |
- 0,004 |
0,102 |
|
> 1-1/2 |
< 2-1/2 |
> 38,10 |
< 63,50 |
- 0,004 |
0,102 |
- 0,005 |
0,127 |
|
> 2-1/2 |
< 3-1/8 |
> 63,50 |
< 79,375 |
- 0,005 |
0,127 |
- 0,006 |
0,152 |
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> 3-1/8 |
< 4 |
> 79,375 |
< 101,60 |
- 0,005 |
0,127 |
- 0,006 |
0,152 |
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ROUNDS |
inch |
mm |
|
inch |
mm |
|
inch |
mm |
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|
<
1-1/2 |
|
< 38,10 |
- 0,002 |
0,051 |
- 0,003 |
0,076 |
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> 1-1/2 |
< 2-1/2 |
> 38,10 |
< 63,50 |
- 0,003 |
0,076 |
- 0,004 |
0,102 |
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> 2-1/2 |
< 4 |
> 63,50 |
< 101,6 |
- 0,004 |
0,102 |
- 0,005 |
0,127 |
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> 4 |
< 6 |
> 101,6 |
< 152,4 |
- 0,005 |
0,127 |
- 0,006 |
0,152 |
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> 6 |
< 8 |
> 152,4 |
< 203,2 |
- 0,006 |
0,152 |
- 0,007 |
0,178 |
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> 8
<
9 |
< 9 |
> 203,2 |
< 228,6 |
- 0,007 |
0,178 |
- 0,008 |
0,203 |
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While size tolerances are usually specified as minus, tolerances may be ordered all plus, or distributed plus and minus, with sum being equivalent to the tolerances listed (ex. +0,10 or + 0,05 mm) |
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