From: "BUDGRAHAM" To: Subject: Wall Thickness Variation permitted by ASTM A 513-85,Hot, Cold and DOM, Excell Files Date: Tue, 16 Dec 1997 15:06:45 -0500 X-MSMail-Priority: Normal WALL THICKNESS VARIATION PERMITTED IN HOT ROLLED STEEL TUBE, ASTM A 513-85 OD range 0.750 1.000 1.9375 3.750 1.000 1.9375 3.750 4.500 BWG "t", inch PLUS MINUS PLUS MINUS PLUS MINUS PLUS MINUS 16 0.065 0.005 0.009 0.004 0.01 0.003 0.011 0.002 0.012 RANGE 0.070 0.056 0.069 0.055 0.068 0.054 0.067 0.053 Max % Red 20.0% 20.3% 20.6% 20.9% Cal.strip W 3.030 6.069 11.943 14.375 15 0.072 0.005 0.009 0.004 0.01 0.003 0.011 0.002 0.012 RANGE 0.077 0.063 0.076 0.062 0.075 0.061 0.074 0.060 Max % Red 18.2% 18.4% 18.7% 18.9% Cal.strip W 3.009 6.049 11.922 14.354 14 0.083 0.006 0.01 0.005 0.011 0.004 0.012 0.003 0.013 RANGE 0.089 0.073 0.088 0.072 0.087 0.071 0.086 0.070 Max % Red 18.0% 18.2% 18.4% 18.6% Cal.strip W 2.973 6.013 11.886 14.318 13 0.095 0.006 0.01 0.005 0.011 0.004 0.012 0.003 0.013 RANGE 0.101 0.085 0.100 0.084 0.099 0.083 0.098 0.082 Max % Red 15.8% 16.0% 16.2% 16.3% Cal.strip W 2.938 5.977 11.850 14.282 12 0.109 0.006 0.01 0.005 0.011 0.004 0.012 0.003 0.013 RANGE 0.115 0.099 0.114 0.098 0.113 0.097 0.112 0.096 Max % Red 13.9% 14.0% 14.2% 14.3% Cal.strip W 2.896 5.935 11.808 14.241 11 0.12 0.006 0.01 0.005 0.011 0.004 0.012 0.003 0.013 RANGE 0.126 0.110 0.125 0.109 0.124 0.108 0.123 0.107 Max % Red 12.7% 12.8% 12.9% 13.0% Cal.strip W 2.863 5.902 11.776 14.208 10 0.134 0.006 0.01 0.005 0.011 0.004 0.012 0.003 0.013 RANGE 0.140 0.124 0.139 0.123 0.138 0.122 0.137 0.121 Max % Red 11.4% 11.5% 11.6% 11.7% Cal.strip W 2.821 5.861 11.734 14.166 9 0.148 0.006 0.012 0.005 0.013 0.004 0.014 RANGE 0.148 0.148 0.154 0.136 0.153 0.135 0.152 0.134 Max % Red 0.0% 11.7% 11.8% 11.8% Cal.strip W 2.798 5.816 11.689 14.121 8 0.165 0.006 0.012 0.005 0.013 0.004 0.014 RANGE 0.165 0.165 0.171 0.153 0.170 0.152 0.169 0.151 Max % Red 0.0% 10.5% 10.6% 10.7% Cal.strip W 2.747 5.765 11.639 14.071 7 0.18 0.006 0.012 0.005 0.013 0.004 0.014 RANGE 0.180 0.180 0.186 0.168 0.185 0.167 0.184 0.166 Max % Red 0.0% 9.7% 9.7% 9.8% Cal.strip W 2.702 5.721 11.594 14.026 6 0.203 0.007 0.015 0.006 0.016 RANGE 0.203 0.203 0.203 0.203 0.210 0.188 0.209 0.187 Max % Red 0.0% 0.0% 10.5% 10.5% Cal.strip W 2.634 5.670 11.519 13.951 WALL THICKNESS VARIATION PERMITTED IN COLD ROLLED STEEL TUBE, ASTM A 513-85 OD range 0.375 0.785 1.875 3.750 0.875 1.875 3.750 5.000 BWG "t", inch PLUS MINUS PLUS MINUS PLUS MINUS PLUS MINUS 20 0.035 0.002 0.005 0.001 0.005 0.001 0.005 RANGE 0.037 0.030 0.036 0.030 0.036 0.030 0.035 0.035 Max % Red 18.9% 16.7% 16.7% 0.0% Cal.strip W 2.724 5.965 12.038 16.089 18 0.049 0.003 0.006 0.002 0.006 0.002 0.006 RANGE 0.052 0.043 0.051 0.043 0.051 0.043 0.049 0.049 Max % Red 17.3% 15.7% 15.7% 0.0% Cal.strip W 2.679 5.921 11.993 16.048 16 0.065 0.005 0.007 0.004 0.007 0.004 0.007 0.004 0.007 RANGE 0.070 0.058 0.069 0.058 0.069 0.058 0.069 0.058 Max % Red 17.1% 15.9% 15.9% 15.9% Cal.strip W 2.625 5.867 11.940 15.988 14 0.083 0.006 0.007 0.005 0.007 0.004 0.007 0.004 0.007 RANGE 0.089 0.076 0.088 0.076 0.087 0.076 0.087 0.076 Max % Red 14.6% 13.6% 12.6% 12.6% Cal.strip W 2.569 5.810 11.886 15.934 13 0.095 0.006 0.007 0.005 0.007 0.004 0.007 0.004 0.007 RANGE 0.101 0.088 0.100 0.088 0.099 0.088 0.099 0.088 Max % Red 12.9% 12.0% 11.1% 11.1% Cal.strip W 2.533 5.775 11.850 15.899 12 0.109 0.005 0.007 0.004 0.007 0.004 0.007 RANGE 0.109 0.109 0.114 0.102 0.113 0.102 0.113 0.102 Max % Red 0.0% 10.5% 9.7% 9.7% Cal.strip W 2.509 5.733 11.808 15.857 11 0.120 0.006 0.008 0.005 0.008 0.005 0.008 RANGE 0.120 0.120 0.126 0.112 0.125 0.112 0.125 0.112 Max % Red 0.0% 11.1% 10.4% 10.4% Cal.strip W 2.476 5.697 11.773 15.821 10 0.134 0.007 0.008 0.006 0.008 0.005 0.008 RANGE 0.134 0.134 0.141 0.126 0.140 0.126 0.139 0.126 Max % Red 0.0% 10.6% 10.0% 9.4% Cal.strip W 2.434 5.652 11.728 15.779 ELEMENTS OF ROUND SECTIONS, COMPARISON OF VARIATIONS ALLOWED BY ASTM A 513-85 Section One, HOT ROLLED Delta T % Diff. Section Two, COLD ROLLED Delta T % Diff. Max / Min Max / Min Max / Min Max / Min Enter: Max.Diam 3.008 Enter: Max.Diam 3.008 Min. Diam 2.992 0.016 0.5319% Min. Diam 2.992 0.016 0.5319% Max Wall 0.0870 Max Wall 0.0870 Min. Wall 0.0710 0.016 18.3908% Min. Wall 0.0760 0.011 12.6437% MAX Area Section One = 0.7984 MAX Area Section Two = 0.7984 MIN 0.6515 0.147 18.3908% MIN 0.6962 0.102 12.7932% MAX Moment of Inertia = 0.8522 MAX Moment of Inertia = 0.8522 MIN 0.6953 0.157 18.4150% MIN 0.7405 0.112 13.1096% MAX Section Modulus = 0.5666 MAX Section Modulus = 0.5666 MIN 0.4648 0.102 17.9787% MIN 0.4950 0.072 12.6449% MAX Radius of Gyration = 1.033187 MAX Radius of Gyration = 1.033187 MIN 1.033034 0.000153 0.0148% MIN 1.031312 0.001876 0.1815% MAX Weight, pounds / ft.= 2.7141 MAX Weight, pounds / ft.= 2.7141 MIN 2.2150 0.499 18.3908% MIN 2.3669 0.347 12.7932% MAX Ratio D / t = 34.5747 MAX Ratio D / t = 34.5747 MIN 42.1408 0.820456 2.3730% MIN 39.3684 0.878235 2.5401% y t Section Three, COLD DRAWN Delta T % Diff. OVER MANDREL Max / Min Max / Min x Enter: Max.Diam 3.009 Min. Diam 3.000 0.009 0.2991% Max Wall 0.0860 D Min. Wall 0.0800 0.006 6.9767% Area, A = PI X t (D - t) MAX Area Section Three = 0.7897 Moment of Inertia, I(x-x) = I(y-y) = (PI ( D^4 - (D - 2t)^4)) / 64 MIN 0.7339 0.056 7.0722% Section Modulus, S(x-x) = S(y-y) = (2 X I(x-x) ) / D MAX Moment of Inertia = 0.8442 Radius of gyration, r(x-x) = r(y-y) = SQ. ROOT of ( I(x-x) / A ) MIN 0.7828 0.061 7.2735% Weight, Pounds / Foot = 3.3996 X A MAX Section Modulus = 0.5611 MIN 0.5218 0.039 6.9954% NOTES: MAX Radius of Gyration = 1.033884 Comparison of permissible section variations between as welded, MIN 1.032763 0.001120 0.1084% Hot Rolled (P&O), Cold Rolled and MAX Weight, pounds / ft.= 2.6848 Hot Rolled, P&O, with Inline Gauge Control, ASTM A 513-85 MIN 2.4949 0.190 7.0722% All comparisons made on a nominal 3" outside diameter X 0.083" MAX Ratio D / t = 34.9884 wall tube. MIN 37.5000 0.933023 2.6667% Provided by Coil Joining Technologies, all rights reserved, copyright 1997 ELEMENTS OF ROUND SECTIONS, COMPARISON OF VARIATIONS ALLOWED BY ASTM A 513-85 Comparison made based upon new MINI MILL tolerance Hot Rolled P&O steels; available at 1/2 thickness tolerance. Inline Gauge Control applied to maintain wall thickness at Minimum - 0",+ .001". Tolerance for Thickness as received from the mill, Hot Rolled P&O Gauge Thick. Minus Plus 14 0.083 0.012 0.004 Range = 0.016 max/min 0.087 0.071 Improved Hot Rolled 1/2 Tolerance range Range= 0.008 max/min 0.079 0.071 Added improvement Section Four, HRS/P&O Delta T % Diff. With GAUGE CONTROL Max / Min Max / Min Advantages Enter: Max.Diam 3.008 Min. Diam 2.992 0.016 0.5319% 1. More uniform section is easier to work with, Max Wall 0.0720 overbend and overform requirements not as Min. Wall 0.0710 0.001 1.3889% variable from one tube batch to another. MAX Area Section Four = 0.6641 2. Even with the same variation in outside Dia. MIN 0.6515 0.013 1.8927% the overall percentage of section element MAX Moment of Inertia = 0.7160 variation is lowest for tubes made with MIN 0.6953 0.021 2.8936% In-Line Gauge correction. MAX Section Modulus = 0.4761 MIN 0.4648 0.011 2.3743% 3. Most uniform finished part weight. MAX Radius of Gyration = 1.038345 MIN 1.033034 0.005310 0.5114% 4. Most cost efficient use of raw material for MAX Weight, pounds / ft.= 2.2577 both the producer and tube fabricator. MIN 2.2150 0.043 1.8927% MAX Ratio D / t = 41.7778 MIN 42.1408 0.991384 2.3730% Provided by Coil Joining Technologies, all rights reserved, copyright 1997 No reproductions permitted without permission, CJT, P.O. Box 360366, Strongsville, Ohio, USA, 44136, PH 1-800-690-7763