ASTM A512 SA512 Tube



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ASTM A512 Cold-Drawn Buttweld Carbon Mechanical Tubing suppliers

ASTM A512 Cold-Drawn Buttweld Carbon Mechanical Tubing

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ASTM A512 – Cold Drawn Buttweld

COLD DRAWN BUTTWELD MECHANICAL TUBINGASTM A-512

Buttweld mechanical tubing is made from buttwelded or continuous welded tube hollows, drawn to size with a mandrel. It is produced in OD sizes ranging from 1/4 inch to 3-1/2 inch OD. The tubing is cold drawn for the purpose of obtaining dimensional accuracy and improved mechanical properties. Applications include axles, truck and railroad parts, and many more where weight-to-strength ratio and tolerances are important.

ASTM A512 ASME SA512 Standard for Cold-Drawn Buttweld Carbon Steel Mechanical Tubing covers cold-drawn buttweld carbon steel tubes for use as round, square, rectangular or special shape mechanical tubing. The carbon steel can be made unless a specific type of melting process is required by the purchaser.

This specification covers cold-drawn buttweld carbon steel tubes for use as mechanical tubing.

This specification covers round, square, rectangular, and special shape mechanical tubing.

Round tube size ranges covered are outside diameters up to 3 1/2 in. (88.9 mm) and wall thickness from 0.035 to 0.500 in. (0.89 to 12.70 mm).

Diameter
(Including Ovality) Mandrel Down

OD Size
Range
Inches
OD
Tolerance
Inches
ID
Tolerlance
Inches
0.500 to 1.499
+0.005
+0.000
– 0.000
– 0.005*
1.500 & Over
+0.010
+0.000
– 0.000
– 0.010

*Under 0.500 inch ID a greater tolerance may be required.

STANDARD DIMENSIONAL TOLERANCES — Round Tubing

Wall
Mandrel drawn plus or minus 7 percent, except when walls are lighter than 0.156 inch, the tolerance is plus or minus 10 percent.

Length
Mandrel Drawn

Length Range
Fleet
OD Size Range
Inches
Tolerance
Inches
4 and less
to 2.000
+1/16-0
4 and less
2.001 & Over
+3/32-0
4 to 10
to 2.000
+3/32-0
4 to 10
2.001 & Over
+1/8 -0
Over 10
All
+1/8 -0

ROUND TUBING TOLERANCES

Straightness — Mandrel Drawn
0.030 inch maximum deviation from a straight line in a three foot length. Under three feet, 0.010 inch per foot. Soft annealed tubing or small diameter long lengths may exceed these figures.

Concentricity — Mandrel Drawn
5 percent of the wall. The wall is calculated from the mean OD and mean ID after applying standard tolerances. 5 percent eccentricity equals 10 percent total indicator reading when chucked on the OD and gaged on the ID or vice versa

MECHANICAL PROPERTIES
Round Tubing Mandrel Drawn Stress Relieved*

Grade
Minimum
Yield,
PSI
Minimum
Tensile,
PSI
Elongation
Percent
in 2 In.
Minimum
Hardiness
Rockwell B
C-1010
58,000
63,000
15
70
C-1012
58,000
63,000
15
70
C-1015
60,000
66,000
14
72
C-1016
61,500
67,000
13
73
C-1018
62,500
68,000
13
73
C-1020
65,000
71,000
11
73
C-1030
70,000
80,000
10
80
C-1110
58,000
63,000
15
70
C-1115
62,500
68,000
13
73

*Soft and intermediate annealed tubing is also available.

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ASTM A512 Cold-Drawn Buttweld Carbon Mechanical Tubing suppliers

ASTM A512 Cold-Drawn Buttweld Carbon Mechanical Tubing suppliers

ASTM A512 Cold-Drawn Buttweld Carbon Mechanical Tubing

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