ABOUT STEEL

COLD FINISHED DIMENSION TOLERANCES
Tolerance Class According to Final Condition
Final Condition  h 6 h 7 h 8 h 9 h 10 h 11 h 12
Cold Drawn       R R R,S,H R,S,H
Peeled       R R R R
Grinded R R R R R R R
Bright R R R R R R R
R = Round , S = Square , H = Hexagon
Tolerance Classes
Dimension mm h 6 h 7 h 8 h 9 h 10 h 11 h 12
> 1-≤ 3 0.006 0.010 0.014 0.025 0.040 0.060 0.100
> 3-≤ 6 0.008 0.012 0.018 0.030 0.048 0.075 0.120
> 6 -≤ 10 0.009 0.015 0.022 0.036 0.058 0.090 0.150
> 10-≤ 18 0.011 0.018 0.027 0.043 0.070 0.110 0.180
> 18 -≤ 30 0.013 0.021 0.033 0.052 0.084 0.130 0.210
>30- ≤ 50 0.016 0.025 0.039 0.062 0.100 0.160 0.250
> 50 -≤ 80 0.019 0.030 0.046 0.074 0.120 0.190 0.300
> 80 -≤ 120 0.022 0.035 0.054 0.087 0.140 0.220 0.350
> 120- ≤1 80 0.025 0.040 0.063 0.100 0.160 0.250 0.400
> 180 -≤ 200 0.029 0.046 0.072 0.115 0.185 0.290 0.460
Cold Drawn Flat Bar Tolerances
Width Tolerance Class Thickness Tolerance Class
mm mm mm
≤ 18 + 0 - 0.11 h 11 > 3 ≤ 6 - 0.075 h 11
> 18 ≤ 30 + 0 - 0.13 h 11 >6 ≤ 10 - 0.090 h 11
>30 ≤ 50 + 0 - 0.16 h 11 > 10 ≤ 18 - 0.11 h 11
> 50 ≤ 80 + 0 - 0.19 h 11 > 18 ≤ 30 - 0.13 h 11
> 80 ≤ 100 + 0 - 0.22 h 11 >30 ≤ 50 - 0.16 h 11
>100 ≤ 150 + 0.50 - 0.50   >50 ≤ 60 - 0.19 h 11
> 150 ≤ 200 + 1.00 - 1.00   > 60 ≤ 80 - 0.30 h 12
> 200 ≤ 300 + 2.00 - 2.00   > 80 ≤ 100 - 0.35 h 12
> 300 ≤ 400 + 2.50 - 2.50        
Straightness Tolerance
Product Shape Steel Group Dimension Max. Tolerance mm
Round 0.25 % C   1.0
Round 0.25 % C, Alloy steels, heat treatable steels   1.5
Round Stainless steels, bearing steels, tool steels   1.0
Round < 0.25 % C d < 75 mm 1.0
Square and Hexagon % 0.25 C, Alloy steels, heat treatable steels d < 75mm 2.0
Square and Hexagon Stainless steels, bearing steels, tool steels d < 75 mm 1.0
Square and  Hexagon < 0.25 % C d < 75 mm 1.5
Square and  Hexagon % 0.25 C , Alloy steels, heat treatable steels d < 75 mm 2.5
Square and Hexagon Stainles steels, bearing steels, tool steels d <75 mm 1.5
Square and Hexagon      
Square and Hexagon      
Square and Hexagon     Width
Flat < 0.25 % C w < 120 mm 1.5
Flat % 0.25 C, Alloy steels, heat treatable steels w < 120 mm 1.5
Flat Stainless steels, bearing steels, tool steels w < 120 mm 1.5
Flat     Thickness
Flat < 0.25 % C w < 120 mm 1.5
Flat < 0.25 % C , Alloy steels, heat treatable w < 120 mm 2.0
Flat Stainless steels, bearing steels, tool steels w < 120 mm 2.0
Flat     Width
Flat < 0.25 % C w < 120 mm 1.5
Flat < 0.25 %C Alloy steels, heat treatable w < 120 mm 2.0
Flat Stainless steels, bearing steels, tool steels w < 120 mm 2.0
Flat     Thickness
Flat < 0.25 % C w ≥ 120 mm
w / t <10 : 1		 2.0
Flat < 0.25 %C Alloy steels, heat treatable w ≥ 120 mm
w / t <10 : 1		 2.5
Flat Stainless steels, bearing steels, tool steels w ≥ 120 mm
w / t <10 : 1		 2.5
Flat     Width
Flat < 0.25 % C w ≥ 120 mm
w / t ≥10 : 1		 2.0
Flat < 0.25 %C Alloy steels, heat treatable w ≥ 120 mm
w / t ≥10 : 1		 2.5
Flat Stainless steels, bearing steels, tool steels w ≥ 120 mm
w / t ≥10 : 1		 2.5
Flat     Thickness
Flat < 0.25 % C w ≥ 120 mm
w / t ≥10 : 1		 2.5
Flat < 0.25 %C Alloy steels, heat treatable w ≥ 120 mm
w / t ≥10 : 1		 3.0
Flat Stainless steels, bearing steels, tool steels w ≥ 120 mm
w / t ≥10 : 1		 3.0
Length Types & Length Tolerances 
Length Type Length mm Length Tolerance mm Order Information should include
Production Length 3000 - 9000 ± 500 Length
Supplied Length 3000 veya 6000 0. + 200
0. + 200		 Ex: stock 6000
Cut Length Up to 9000 mm First the properties within  ± 5 tolerance Length & Tolerance

 
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