Metal Bars Inc.

TOLERANCES REFERENCE TABLES

STRAIGHTNESS TOLERANCES

FORM - SIZE	LENGTH IN FEET	MAXIMUM CURVATURE (Depth of Arc) IN INCHES
ROUNDS
Less than .28 Carbon
Less than 5/8"	Less than 15'	1/8" in any 10' portion of the total length
Less than 5/8"	15' and Over	1/8" in any 10' portion of the total length
5/8" and Over	Less than 15'	1/16" in any 10' portion of the total length
5/8" and Over	15' and Over	1/8" in any 10' portion of the total length
.28 Carbon and Over and all Heat Treated Material
Less than 5/8"	Less than 15'	3/16" in any 10' portion of the total length
Less than 5/8"	15' and Over	5/16" in any 10' portion of the total length
5/8" and Over	Less than 15'	1/8" in any 10' portion of the total length
5/8" and Over	15' and Over	3/16" in any 10' portion of the total length
HEXAGONS, OCTAGONS AND SQUARES
Less than .28 Carbon
Less than 5/8"	Less than 15'	3/16" in any 10' portion of the total length
Less than 5/8"	15' and Over	5/16" in any 10' portion of the total length
5/8" and Over	Less than 15'	1/8" in any 10' portion of the total length
5/8" and Over	15' and Over	3/16" in any 10' portion of the total length
.28 Carbon and Over and all Heat Treated Material
Less than 5/8"	Less than 15'	1/4" in any 10' portion of the total length
Less than 5/8"	15' and Over	3/8" in any 10' portion of the total length
5/8" and Over	Less than 15'	3/16" in any 10' portion of the total length
5/8" and Over	15' and Over	1/4" in any 10' portion of the total length

Departure from straightness shall be measured by placing the rod or shapes on a level table so that the arc of departure from straightness is horizontal, and the depth of arc measured with a steel scale and a straight edge.

DIMENSIONAL TOLERANCES
Tolerances Provide For Undersize Variation Only

SIZE RANGE In Inches	MAXIMUM OF CARBON Range 0.28% or Less	MAXIMUM OF CARBON Range Over 0.28% / 0.55% Incl.
ROUNDS - COLD DRAWN OR TURNED AND POLISHED
To 1-1/2" Incl.	.002"	.003"
Over 1-1/2" to 2-1/2" Incl.	.003"	.004"
Over 2-1/2" to 4" Incl.	.004"	.005"
Over 4" to 6" Incl.	.005"	.006"
Over 6" to 8" Incl.	.006"	.007
Over 8" to 9" Incl.	.007"	.008"
HEXAGONS - COLD DRAWN
To 3/4" Incl.	.002"	.003"
Over 3/4" to 1-1/2" Incl.	.003"	.004"
Over 1-1/2 to 2-1/2" Incl.	.004"	.005"
Over 2-1/2" to 4" Incl.	.005"	.006"
SQUARES - COLD DRAWN
To 3/4" Incl.	.002"	.004"
Over 3/4" to 1-1/2" Incl.	.003"	.005"
Over 1-1/2" to 2-1/2" Incl.	.004"	.006"
Over 2-1/2" to 4" Incl.	.005"	.008"
Over 4" to 5" Incl.	.010"
FLATS (NOTE) - COLD DRAWN
WIDTH IN INCHES To 3/4" Incl.	.003"	.004"
Over 3/4" to 1-1/2" Incl.	.004"	.005"
Over 1-1/2" to 3" Incl.	.005"	.006"
Over 3" to 4" Incl.	.006"	.008"
4" to 6" Incl.	.008"	.010"
Over 6"	.013	.015"

This table includes tolerances for bars that have not been annealed or that have been annealed, speroidized, normalized and tempered before cold finishing. Tis table does not include tolerances for bars that are normalized or normalized and tempered, after cold finishing.
Note: The Tolerances on Flats apply to thickness as well as width.

STRESSPROOF

SIZE RANGE In Inches	TOLERANCES (Tolerances, in decimals of an inch, provide for undersized variation only)
ROUNDS
1/4" - 1-1/2" Incl.	.004"
Over 1-1/2" to 2-1/2" Incl.	.005"
Over 2-1/2" to 4" Incl.	.006"
Over 4" to 5" Incl.	.007"
HEXAGONS
1/4" to 3/4" Incl.	.004"
Over 3/4" to 1-1/2" Incl.	.005"
Over 1-1/2 to 2" Incl.	.006"

"E.T.D." 150

SIZE RANGE In Inches	TOLERANCES (Tolerances, in decimals of an inch, provide for undersized variation only)
ROUNDS
1/4" - 1-1/2" Incl.	.005"
Over 1-1/2" to 2-1/2" Incl.	.006"
Over 2-1/2" to 3-1/2" Incl.	.006"
Over 4" to 5" Incl.	.007"

RECOMMENDED STOCK REMOVAL
The following formula is the generally accepted industry standard for calculating allowable seam depth

NON-RESULPHURIZED GRADES
Grade	Spec
1018, 1045	.001 per side for each 1/16" diameter
RESULPHURIZED GRADES
Grade	Spec
1117, 1137 Nu-Standard (1114) Stressproof (1114) 1215, 12L14 12L14 Tellurium	.0015 per side for each 1/16" diameter

TOLERANCES, IN DECIMALS OF AN INCH, PROVIDE FOR UNDERSIZE VARIATIONS ONLY

C-1045	COLD DRAWN GROUND AND POLISHED		TURNED, GROUND AND POLISHED
SIZE RANGE IN INCHES	Not Heat Treated	Heat Treated	Not Heat Treated	Heat Treated
To 1-1/2" Incl. (Note)	.001"	.001"	.001"	.001"
Over 1-1/2" to less than 2-1/2"	.0015"	.0015"	.0015"	.0015"
2-1/2" to 3" Incl.	.002"	.002"	.002"	.002"
Over 3" to 4" Incl.	.003"	.003"	.003"	.003"

(Note) Tolerances may be taken over or under the finished size on sizes 1-1/2" and under.