Dura-Bar Stock Allowances

Rounds

65-45-12, 80-55-06, G2,G2P

Round bars are made with sufficient stock on the outside diameter to guarantee clean-up at the nominal dimensions. Stock allowance is a function of the bar diameter. Example: 3.00” + 0.118” = 3.118” tolerance is +/- 0.030” Max size = 3.148 Min size = 3.088. A 3.000” bar is guaranteed to finish at 3.000”. Stock allowances and allowable deviations for round bars are shown below. 


Nominal Diameter Bar SizeGraySSDI/65-45-12 Ductile80-55-06 Ductile100-70-03 DuctileNi-ResistVariation (+/-) All Grades
0.750 - 1.250"0.085"0.088"0.088"0.088"0.088"0.017"
1.251 - 2.000"0.090"0.095"0.090"0.090"0.095"0.024"
2.001 - 3.000"0.110"0.118"0.113"0.108"0.118"0.030"
3.001 - 4.000"0.125"0.136"0.131"0.126"0.136"0.038"
4.001 - 5.000"0.140"0.154"0.149"0.144"0.154"0.048"
5.001 - 6.000"0.155"0.172"0.162"0.152"0.172"0.055"
6.001 - 7.000"0.170"0.190"0.180"0.170"---0.062"
7.001 - 8.000"0.190"0.213"0.203"0.183"---0.085"
8.001 - 9.000"0.216"0.242"0.232"0.212"---0.108"
9.001 - 10.000"0.254"0.283"0.273"0.253"---0.129"
10.001 - 11.000"0.400"0.432"0.422"------0.150"
11.001 - 16.000"0.582"0.623"0.608"------0.206"
16.001 - 18.000"0.762"0.815"0.795"------0.262"
18.001 - 20.000"0.762"0.819"0.799"------0.262"

65-45-12X, 80-55-06X, and GX

Round bars are made with sufficient stock on the outside diameter to guarantee clean-up at the nominal dimensions. Stock allowance is a function of the bar diameter. 


DiameterMean Stock AllowanceToleranceMin. Stock AllowanceMax. Stock Allowance
21.64 - 26.56"0.980"+/- 0.500"0.480"1.48"

Rectangles

65-45-12, 80-55-06, G2,G2P

Rectangles are made to the actual dimensions. Clean-up stock must be considered when ordering. Example: 8.00” x 21.00” will finish to 7.50” x 20.50”. Clean up stock per side is 0.250”. Minimum clean-up stock allowances are shown below. 


HeightRatio (Width:Height)
0.000 - 1.9992.000 - 2.9993.000 - 4.9995.000 - 7.9998.000 & Up
0.750 - 1.500"0.090"0.100"0.125"0.188"0.188"
1.501 - 2.500"0.090"0.100"0.125"0.188"0.188"
2.501 - 4.000"0.100"0.188"0.250"0.250"--
4.001 - 6.000"0.112"0.188"0.250"----
6.001 - 8.500"0.125"0.250"0.250"----
8.501 - 11.500"0.188"0.250"------
11.501 - 13.999"0.250"--------
14.000 - 20.000"0.500"--------

65-45-12X, 80-55-06X

X Grades rectangles stock allowance is based on the width of the bar. Clean-up stock must be considered when ordering. Example: 20.0” x 25.60” max finish size is 19.0” x 24.6”.


WidthStock Removal Per Side
12.001 - 16.000"0.370"
16.001 - 20.000"0.450"
20.001 - 29.500"0.500"

GX

X Grades rectangles are based on the width of the bar. Clean-up stock must be considered when ordering. Example: 16.0” x 28.0” max finish size is 15.10” x 27.10”. 


WidthStock Removal Per Side
0.750 - 2.000"0.100"
2.001 - 4.000"0.140"
4.001 - 8.000"0.180"
8.001 - 12.000"0.260"
12.001 - 16.000"0.300"
16.001 - 20.000"0.370"
20.001 - 29.500"0.450"

Bend and Bow Tolerance

Bend and bow tolerance is 1/8" per 6-foot section.

 

Please contact us with any questions.