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ASTM A512 Cold-drawn Welded Steel Mechanical Tubes
covers cold-drawn buttweld carbon steel tubes for use as mechaninal tubin
This specification covers round,square,rectangular,and special shape mechanical tubing.
Round tube size ranges covered are outside diameters up 3 to1/2in.(88.9mm)and wall thickness from 0.035 to 0.500in.(0.89to12.70mm)
Chemical Composition Limits, % | |||||
Grade Designation |
Carbon |
Manganese |
Phospho-rus,max |
Sulfur, max |
|
MT |
1010 |
0.05-0.15 |
0.3-0.6 |
0.045 |
|
MT |
1015 |
0.10-0.20 |
0.3-0.6 |
0.04 |
0.045 |
MT X |
1015 |
0.10-0.20 |
0.6-0.9 |
0.04 |
0.045 |
MT |
1020 |
0.15-0.25 |
0.3-0.6 |
0.04 |
0.045 |
MT X |
1020 |
0.15-0.25 |
0.7-1.00 |
0.04 |
0.045 |
Rimmed or capped steels which may be used for the above grades are characterized by a lack of uniformity in their chemical composition, and for this reason product analysis is not technologically appropriate unless misapplication is clearly indicated.
Chemical Composition Limits, % | ||||
Grade DesignationB |
Carbon |
Manganese |
Phospho-rus,max |
Sulfur, max |
1008 |
0.10 max |
0.50 max |
0.040 |
0.045 |
1010 |
0.08–0.13 |
0.30–0.60 |
0.040 |
0.045 |
1012 |
0.10–0.15 |
0.30–0.60 |
0.040 |
0.045 |
1015 |
0.12–0.18 |
0.30–0.60 |
0.040 |
0.045 |
1016 |
0.12–0.18 |
0.60–0.90 |
0.040 |
0.045 |
1018 |
0.14–0.20 |
0.60–0.90 |
0.040 |
0.045 |
1019 |
0.14–0.20 |
0.70–1.00 |
0.040 |
0.045 |
1020 |
0.17–0.23 |
0.30–0.60 |
0.040 |
0.045 |
1021 |
0.17–0.23 |
0.60–0.90 |
0.040 |
0.045 |
1025 |
0.22–0.28 |
0.30–0.60 |
0.040 |
0.045 |
1026 |
0.22–0.28 |
0.60–0.90 |
0.040 |
0.045 |
1030 |
0.27–0.34 |
0.60–0.90 |
0.040 |
0.045 |
1035 |
0.31–0.38 |
0.60–0.90 |
0.040 |
0.045 |
1110 |
0.08–0.15 |
0.30–0.60 |
0.040 |
0.130C |
1115 |
0.13–0.20 |
0.60–0.90 |
0.040 |
0.130C |
1117 |
0.14–0.20 |
1.00–1.30 |
0.040 |
0.130C |
Rimmed or capped steels which may be used for the above grades are characterized by a lack of uniformity in their chemical composition, and for this reason product analysis is not technologically appropriate unless misapplication is clearly indicated.
B Other analyses are available.
C Grades 1110, 1115 and 1117 shall contain 0.08 min % sulfur.
Element |
Limit, or Maximum of Specified |
Variation, Over Maximum Limit or Under Minimum Limit |
|
Range, % |
Under min, % |
Over max, % |
|
Carbon |
To 0.15, incl |
0.02 |
0.03 |
Over 01.5 |
0.03 |
0.04 |
|
Manganeses |
To 0.60, incl |
0.03 |
0.03 |
Over 0.60 |
0.04 |
0.04 |
|
Phosphorus |
0.01 |
||
Sulfur |
0.01 |
||
Tensile and Hardness Requirements for Stress Relief Annealed Round Tubes
Grade |
Tensile Strength, ksi (MPa) |
(0.2 % Offset) Yield Strength, |
Elongation in 2 in. or 50 mm, |
Rockwell Hardness |
||
min |
max |
min, ksi (MPa) |
min, % |
min |
max |
|
MT1010 |
63（434） |
100（689） |
58（400） |
15 |
B70 |
B90 |
1011 |
65（448） |
100（689） |
59（407） |
13 |
B70 |
|
MT1015 |
66（555） |
100（689） |
60（414） |
14 |
B70 |
B100 |
1016 |
67（462） |
100（689） |
61（421） |
13 |
B70 |
B100 |
MT1017 |
67（462） |
100（689） |
62（427） |
13 |
B72 |
B100 |
1018 |
68（469） |
100（689） |
62（427） |
13 |
B73 |
B100 |
MT1020 |
71（490） |
130（896） |
65（448） |
11 |
B75 |
C20 |
1025 |
72（496） |
130（896） |
67（462） |
11 |
B78 |
C20 |
1030 |
80（552） |
130（896） |
70（483） |
10 |
B80 |
C20 |
1010 |
63（434） |
100（689） |
58（400） |
15 |
B70 |
B100 |
1015 |
68（469） |
100（689） |
62（427） |
13 |
B70 |
B100 |
Lengths 3 ft (0.9 m) and under 61⁄16 in. (1.,6 mm)
Lengths over 3 to 12 ft (0.9 to 3.7 m), incl 61⁄32 in. (2.4 mm)
Lengths over 12 to 20 ft (3.7 to 6.1 m), incl 61⁄8 in. (3.2 mm)
Lengths over 20 to 30 ft (6.1 to 9.1 m), incl 63⁄16 in. (4.8 mm)
Lengths over 30 to 40 ft (9.1 to 12.2 m), incl 63⁄8 in. (9.5 mm)
Applications: Axles, truck and railroad parts, and many more where weight-to-strength ratio and tolerances are important.
Heat Treatment: ASTM A512 tubing product is supplied in as drawn, or normalized, or stress relieved, or annealed condition.
Package: Beveled or straight ends with plastic caps or metal protectors, black painted, hexagonal bundled or loose packing.
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