Cold Finish Flats
Conforms to:
ASTM A29
Related Specifications: A108
Chemistry: (Per ASTM A29-Table)
|
Grade Designation |
Heat Chemical Ranges & Limits, % |
|||
|
Carbon |
Manganese |
Phosphorus |
Sulfur |
|
|
1018 |
0.15 - 0.20 |
0.60 - 0.90 |
0.040 max. |
0.050 max. |
|
1045 |
0.43 - 0.50 |
0.60 - 0.90 |
0.040 max. |
0.050 max. |
Size Tolerance * : (Per ASTM A29 Table A1.13)
|
Size, in. ** “w” |
1018 |
1045 |
|
Max. of Carbon Range Under
0.28% |
Max. Carbon Range Over
0.28% to 0.55% |
|
|
To ¾, incl. |
0.004 |
0.005 |
|
¾ to 1-1/2, incl. |
0.005 |
0.006 |
|
1-1/2 to 3, incl. |
0.006 |
0.007 |
|
3 to 4, incl. |
0.007 |
0.009 |
|
4 to 6, incl. |
0.009 |
0.011 |
|
Over 6, incl. |
0.014 |
NA |
* Tolerances apply to
thickness and width and are minus only, all plus tolerances are 0.
** Note width governs the tolerance for both thickness and
width of flats.
Straightness Tolerances
|
Size, in. |
Length, ft. |
1018 |
1045 |
|
Max. of Carbon Range Under
0.28% |
Max. Carbon Range Over
0.28%-0.55% |
||
|
Less than 5/8 |
Less than 15 |
3/16 |
1/4 |
|
Less than 5/8 |
15 & over |
5/16 |
3/8 |
|
5/8 & over |
Less than 15 |
1/8 |
3/16 |
|
5/8 & over |
15 & over |
3/16 |
¼ |
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