A513 T1 HRP&O

A513-Type 2 This specification covers “as welded” electric-resistance-welded carbon and alloy steel tubing made from cold-rolled steel for use as mechanical tubing. This specification covers round, square, rectangular, and special shape tubing.

Typical Chemical Properties
Grade Designation Carbon Manganese Phosphorus, max. Sulfur, max.
1008 0.10 max. 0.50 max. 0.035 0.035
1010 0.08 – 0.13 0.30 – 0.60 0.035 0.035
1015 0.13 – 0.18 0.30 – 0.60 0.035 0.035
1020 0.18 – 0.23 0.30 – 0.60 0.035 0.035
Typical Mechanical Properties
Hardness Limits and Tensile Properties for Round Tubing Yield Strength, ksi (Mpa), min. Ultimate Strength, ksi (Mpa), min. Elongation in 2 in. or 50 mm, %, min. RB min.
Grade Designation
1008 30 (207) 42 (290) 15 50
1010 32 (221) 45 (310) 15 55
1015 35 (241) 48 (331) 15 58
1020 38 (262) 52 (359) 12 62
Typical Permissible Variations in Wall Thickness
Wall Thickness (inches) {Birmingham Wire Gage} .750 to 1.000 inclusive Over 1.000 inch to 1.313 inch, Inclusive Over 1.313 inch to 3.750 inch, Inclusive Over 3.750 inch to 4.500 inch, Inclusive Over 4.500 inch to 8.000 inch, Inclusive Over 8.000 inch to 10.000 inch, Inclusive Over 10.000 inch to 15.000 inch, Inclusive
0.065 {16} + 0.005 / – 0.009 + 0.004 / – 0.010 + 0.003 / – 0.011 + 0.002 / – 0.012 + 0.002 / – 0.012 …… ……
0.072 {15} + 0.005 / – 0.009 + 0.004 / – 0.010 + 0.003 / – 0.011 + 0.002 / – 0.012 + 0.002 / – 0.012 + 0.003 / – 0.013 ……
0.083 {14} + 0.006 / – 0.010 + 0.005 / – 0.011 + 0.004 / – 0.012 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013
0.095 {13} + 0.006 / – 0.010 + 0.005 / – 0.011 + 0.004 / – 0.012 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013
0.109 {12} + 0.006 / – 0.010 + 0.005 / – 0.011 + 0.004 / – 0.012 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013
0.120 {11} + 0.006 / – 0.010 + 0.005 / – 0.011 + 0.004 / – 0.012 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013
0.134 {10} + 0.006 / – 0.010 + 0.005 / – 0.011 + 0.004 / – 0.012 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013 + 0.003 / – 0.013
0.148 {9} + 0.006 / – 0.012 + 0.005 / – 0.013 + 0.004 / – 0.014 + 0.004 / – 0.014 + 0.004 / – 0.014 + 0.004 / – 0.014
0.165 {8} + 0.006 / – 0.012 + 0.005 / – 0.013 + 0.004 / – 0.014 + 0.004 / – 0.014 + 0.004 / – 0.014 + 0.004 / – 0.014
0.180 {7} + 0.006 / – 0.012 + 0.005 / – 0.013 + 0.004 / – 0.014 + 0.004 / – 0.014 + 0.004 / – 0.014 + 0.004 / – 0.014
0.203 {6} + 0.007 / – 0.015 + 0.006 / – 0.016 + 0.005 / – 0.017 + 0.005 / – 0.017 + 0.005 / – 0.017
0.220 {5} + 0.007 / – 0.015 + 0.006 / – 0.016 + 0.005 / – 0.017 + 0.005 / – 0.017 + 0.005 / – 0.017
0.238 {4} + 0.012 / – 0.020 + 0.011 / – 0.021 + 0.010 / – 0.022 + 0.010 / – 0.022 + 0.010 / – 0.022
0.259 {3} + 0.013 / – 0.021 + 0.012 / – 0.022 + 0.011 / – 0.023 + 0.011 / – 0.023 + 0.011 / – 0.023
0.284 {2} + 0.014 / – 0.022 + 0.013 / – 0.023 + 0.012 / – 0.024 + 0.012 / – 0.024 + 0.012 / – 0.024
0.300 {1} + 0.015 / – 0.023 + 0.014 / – 0.024 + 0.013 / – 0.025 + 0.013 / – 0.025 + 0.013 / – 0.025
0.320 + 0.016 / -0.024 + 0.015 / – 0.025 + 0.014 / – 0.026 + 0.014 / – 0.026 + 0.014 / – 0.026
0.344 + 0.017 / – 0.025 + 0.016 / – 0.026 + 0.015 / – 0.027 + 0.015 / – 0.027 + 0.015 / – 0.027
0.360 + 0.017 / – 0.025 + 0.016 / – 0.026 + 0.015 / – 0.027 + 0.015 / – 0.027 + 0.015 / – 0.027
0.375 + 0.016 / – 0.026 + 0.015 / – 0.027 + 0.015 / – 0.027 + 0.015 / – 0.027
0.406 + 0.017 / – 0.027 + 0.016 / – 0.028 + 0.016 / – 0.028 + 0.016 / – 0.028
0.438 + 0.017 / – 0.027 + 0.016 / – 0.028 + 0.016 / – 0.028 + 0.016 / – 0.028
0.469 + 0.016 / – 0.028 + 0.016 / – 0.028 + 0.016 / – 0.028
0.500 + 0.016 / – 0.028 + 0.016 / – 0.028 + 0.016 / – 0.028
Permissible Variations in Dimensions for Round Tubing
Wall Thickness Flash-in-Tubing Flash Controlled to 0.010 inch max. Tubing
Outside Diameter Range, inches inches Outside Diameter Tolerance +/- (inches) Outside Diameter Tolerance +/- (inches)
.500 to 1.125, inclusive 0.065 to 0.134 0.0035 0.0035
Over 1.125 to 2.000 inclusive 0.065 to 0.259 0.005 0.005
Over 2.000 to 2.500 inclusive 0.065 to 0.259 0.005 0.005
Over 2.500 to 3.000 inclusive 0.065 to 0.259 0.008 0.008
Over 2.500 to 3.000 inclusive 0.284 to 0.320 0.010 0.010
Over 3.000 to 3.500 inclusive 0.065 to 0.259 0.009 0.009
Over 3.000 to 3.500 inclusive 0.284 to 0.360 0.012 0.012
Over 3.500 to 4.000 inclusive 0.065 to 0.259 0.010 0.010
Over 3.500 to 4.000 inclusive 0.284 to 0.500 0.015 0.015
Over 4.000 to 5.000 inclusive 0.065 to 0.500 0.020 0.020
Over 5.000 to 6.000 inclusive 0.065 to 0.500 0.020 0.020
Over 6.000 to 8.000 inclusive 0.120 to 0.500 0.025 0.025
Over 8.000 to 10.000 inclusive 0.083 to 0.500 0.030 0.030
Over 10.000 to 12.000 inclusive 0.083 to 0.500 0.035 0.035
Over 12.000 to 15.000 inclusive 0.083 to 0.500 0.040 0.040

Flash-in-Tubing is produced only to outside diameter tolerances and wall thickness tolerances and the outside diameter welding flash does not exceed the wall thickness or .094 inch, whichever is less.

Flash controlled to 0.010 inch maximum tubing consists of tubing which is commonly produced only to outside diameter tolerances and wall thickness tolerances, in which the height of the remaining flash is controlled not to exceed 0.010 inch.

Straightness – The straightness tolerance for round tubing is 0.030 in./ 3 ft (0.76 mm/1 m) lengths to 8.000 in. (203 mm) outside diameter. For 8.000 in. outside diameter and above, straightness tolerance is 0.060 in./3 ft (1.52 mm/1 m) lengths.

Ovality – The ovality shall be within the tolerances except when the wall thickness is less than 3 % of the outside diameter. In such cases the ovality may be 50 % greater than the outside tolerances but the mean outside diameter shall be within the specified tolerance.

Permissible Variations in Dimensions of Square and Rectangular Tubing
Largest Nominal Outside Dimension, inches Wall Thicknes, inches Outside Tolerance at All Sides at Corners +/- inches
.188 to .625, inclusive 0.020 to 0.083, inclusive 0.004
Over .625 to 1.125, Inclusive 0.022 to 0.156, inclusive 0.005
Over 1.125 to 1.500, Inclusive 0.025 to 0.192, inclusive 0.006
Over 1.500 to 2.000, Inclusive 0.032 to 0.192, inclusive 0.008
Over 2.000 to 3.000, Inclusive 0.035 to 0.259, inclusive 0.01
Over 3.000 to 4.000, Inclusive 0.049 to 0.259, inclusive 0.02
Over 4.000 to 6.000, Inclusive 0.065 to 0.259, inclusive 0.02
Over 6.000 to 8.000, Inclusive 0.185 to 0.259, inclusive 0.025

* Measured at corners at least 2 inches from the end of the tubing.

Convexity and concavity: Tubes having two parrelel sides are measured in the center of the flat sides for convexity and concavity. This tolerance applies to the specific size determined at the corners, and is measured on the following basis:

Largest Nominal Outside Dimension, inches Tolerance +/-, inches
2.500 and under 0.010
Over 2.500 to 4.000 0.015
Over 4.000 to 8.000 0.025

Information provided is “Typical” for specific requirements please inquire.