A513 T2 CR ERW

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 0.05 – 0.15 0.30 – 0.60 0.040 0.050
1020 0.15 – 0.25 0.30 – 0.60 0.040 0.050
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} .375 to 0.875 inclusive Over 0.875 inch to 1.875 inch, Inclusive Over 1.875 inch to 3.750 inch, Inclusive Over 3.750 inch to 5.000 inch, Inclusive Over 5.000 inch to 6.000 inch, Inclusive Over 6.000 inch to 8.000 inch, Inclusive Over 8.000 inch to 10.000 inch, Inclusive Over 10.000 inch to 12.000 inch, Inclusive
0.022 {24} + 0.001 / – 0.005 + 0.001 / – 0.005 ….. ….. ….. …… …… ……
0.028 {22} + 0.001 / – 0.005 + 0.001 / – 0.005 ….. ….. ….. …… …… ……
0.035 {20} + 0.002 / – 0.005 + 0.001 / – 0.005 + 0.001 / – 0.005 ….. ….. …… …… ……
0.042 {19} + 0.002 / – 0.006 + 0.001 / – 0.006 + 0.001 / – 0.006 ….. ….. …… …… ……
0.049 {18} + 0.003 / – 0.006 + 0.002 / – 0.006 + 0.002 / – 0.006 ….. ….. …… …… ……
0.065 {16} + 0.005 / – 0.007 + 0.004 / – 0.007 + 0.004 / – 0.007 + 0.004 / – 0.007 + 0.004 / – 0.007 …… + 0.004 / – 0.008 ……
0.072 {15} + 0.006 / – 0.007 + 0.005 / – 0.007 + 0.004 / – 0.007 + 0.004 / – 0.007 + 0.004 / – 0.008 …… …… ……
0.083 {14} + 0.006 / – 0.007 + 0.005 / – 0.007 + 0.004 / – 0.007 + 0.004 / – 0.007 + 0.004 / – 0.008 + 0.004 / – 0.008 + 0.004 / – 0.008 + 0.004 / – 0.008
0.095 {13} + 0.006 / – 0.007 + 0.005 / – 0.007 + 0.004 / – 0.007 + 0.004 / – 0.007 + 0.004 / – 0.008 + 0.004 / – 0.008 + 0.004 / – 0.008 + 0.004 / – 0.008
0.109 {12} ….. + 0.006 / – 0.008 + 0.005 / – 0.008 + 0.005 / – 0.008 + 0.005 / – 0.009 + 0.005 / – 0.009 + 0.005 / – 0.009 + 0.005 / – 0.009
0.120 {11} ….. + 0.007 / – 0.008 + 0.006 / – 0.008 + 0.005 / – 0.008 + 0.005 / – 0.009 + 0.005 / – 0.009 + 0.005 / – 0.009 + 0.005 / – 0.009
0.134 {10} ….. + 0.007 / – 0.008 + 0.006 / – 0.008 + 0.005 / – 0.008 + 0.005 / – 0.009 + 0.005 / – 0.009 + 0.005 / – 0.009 + 0.005 / – 0.009
Permissible Variations in Dimensions for Round Tubing
Wall Thickness Flash-in-Tubing Flash Controlled to 0.010 inch max. Tubing Flash Controlled to 0.005 inch max. Tubing Flash Controlled to 0.005 inch max. Tubing
Outside Diameter Range, inches inches Outside Diameter Tolerance +/- (inches) Outside Diameter Tolerance +/- (inches) Outside Diameter Tolerance +/- (inches) Inside Diameter Tolerance +/- (inches)
0.375 to 0.625, inclusive 0.022 to 0.065 0.003 …. …. ….
Over 0.625 to 1.125 inclusive 0.022 to 0.042 0.0035 0.0035 0.0035 0.013
Over 0.625 to 1.125 inclusive 0.049 0.0035 0.0035 0.0035 0.015
Over 0.625 to 1.125 inclusive 0.065 to 0.083 0.0035 0.0035 0.0035 0.019
Over 0.750 to 1.125 inclusive 0.095 0.0035 0.0035 0.0035 0.019
Over 0.875 to 1.125 inclusive 0.109 to 0.120 0.0035 0.0035 0.0035 0.021
Over 1.125 to 2.000 inclusive 0.028 to 0.049 0.005 0.005 0.005 0.015
Over 1.125 to 2.000 inclusive 0.065 to 0.095 0.005 0.005 0.005 0.019
Over 1.125 to 2.000 inclusive 0.109 to 0.134 0.005 0.005 0.005 0.022
Over 2.000 to 2.500 inclusive 0.035 to 0.049 0.006 0.006 0.006 0.016
Over 2.000 to 2.500 inclusive 0.065 to 0.095 0.006 0.006 0.006 0.020
Over 2.000 to 2.500 inclusive 0.109 to 0.134 0.006 0.006 0.006 0.023
Over 2.500 to 3.000 inclusive 0.035 to 0.049 0.008 0.008 0.008 0.018
Over 2.500 to 3.000 inclusive 0.065 to 0.095 0.008 0.008 0.008 0.022
Over 2.500 to 3.000 inclusive 0.109 to 0.134 0.008 0.008 0.008 0.025
Over 3.000 to 3.500 inclusive 0.035 to 0.049 0.009 0.009 0.009 0.019
Over 3.000 to 3.500 inclusive 0.065 to 0.095 0.009 0.009 0.009 0.023
Over 3.000 to 3.500 inclusive 0.109 to 0.134 0.009 0.009 0.009 0.026
Over 3.500 to 4.000 inclusive 0.035 to 0.049 0.010 0.010 0.010 0.020
Over 3.500 to 4.000 inclusive 0.065 to 0.095 0.010 0.010 0.010 0.024
Over 3.500 to 4.000 inclusive 0.109 to 0.134 0.010 0.010 0.010 0.027
Over 4.000 to 6.000 inclusive 0.065 to 0.095 0.020 0.020 0.020 0.034
Over 4.000 to 6.000 inclusive 0.109 to 0.134 0.020 0.020 0.020 0.037
Over 6.000 to 8.000 inclusive 0.083 to 0.095 0.025 0.025 0.025 0.039
Over 6.000 to 8.000 inclusive 0.109 to 0.134 0.025 0.025 0.025 0.042
Over 8.000 to 10.000 inclusive 0.065 to 0.095 0.030 0.030 0.030 0.044
Over 8.000 to 10.000 inclusive 0.109 to 0.134 0.030 0.030 0.030 0.049
Over 10.000 to 12.000 inclusive 0.083 to 0.095 0.035 0.035 0.035 0.049
Over 10.000 to 12.000 inclusive 0.109 to 0.134 0.035 0.035 0.035 0.054

Flash-in-Tubing is produced only to outside diameter tolerances and wall thickness tolerances only, and the height of the inside 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 over .625 inch outside diameter which is commonly produced to outside diameter tolerances and wall thickness tolerances only, in which the height of the remaining inside flash is controlled not to exceed 0.010 inch.

Flash controlled to 0.005 inch maximum tubing is produced to outside diameter tolerances and wall thickness tolerances, inside diameter tolerances and wall thickness tolerances, or outside diameter tolerances and inside diameter tolerances, in which the height of the remaining flash is controlled not to exceed 0.005 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:

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