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Some
Specifications:
Chemical Requirements
for Standard Low-Carbon Steels. ASTM A513 states that if the grade of
steel is not specified on the purchase order, Grades MT1010 to MT 1020
may be furnished. Basically, the chemistry ranges for the Mechanical Tubing
chemistries are a little broader. Some of the more common chemistries
are listed in the following table:
| Grade
Designation |
Carbon |
Manganese |
Phosphorus
(max) |
Sulfur
(max) |
| 1008 |
0.10
max |
0.50
max |
0.035 |
0.035 |
| MT
1010 |
0.05
- 0.15 |
0.30
- 0.60 |
0.035 |
0.035 |
| 1010
|
0.08
- 0.13 |
0.30
- 0.60 |
0.035 |
0.035 |
| MT
1015 |
0.10
- 0.20 |
0.30
- 0.60 |
0.035 |
0.035 |
| 1015 |
0.12
- 0.18 |
0.30
- 0.60 |
0.035 |
0.035 |
| MT
X 1015 |
0.10
- 0.20 |
0.30
- 0.90 |
0.035 |
0.035 |
| MT
1020 |
0.15
- 0.25 |
0.30
- 0.60 |
0.035 |
0.035 |
| 1020 |
0.17
- 0.23 |
0.30
- 0.60 |
0.035 |
0.035 |
| MT
X 1020 |
0.15
- 0.25 |
0.70
- 1.00 |
0.035 |
0.035 |
| Tolerances,
Diameter - As Welded Hot Rolled (Type 1) or Cold Rolled (Type 2) |
| Outside
Diameter Range
|
Wall
Thickness Range |
Outside
Diameter +/- |
| 1/2"
to 1-1/8", incl |
0.035
to 0.134 |
0.0035 |
| Over
1-1/8" to 2", incl |
0.035
to 0.148 |
0.005 |
| Over
2" to 2-1/2", incl |
0.065
to 0.148 |
0.006 |
| Over
2-1/2" to 3", incl |
0.065
to 0.148 |
0.008 |
| Over
3" to 3-1/2", incl |
0.065
to 0.148 |
0.009 |
Note: Flash-In
Tubing is produced only to outside diameter tolerances and wall thickness
tolerances and the inside diameter welding flash does not exceed the wall
thickness or 3/32", whichever is less.
| Tolerances,
Outside Dimensions Square and Rectangular Tubing |
| Largest
Nominal Outside Dimension
|
Wall
Thickness Range |
Outside
Tolerances at All Sides at
Corners
+/- in.
|
| 5/8"
to 1-1/8", incl |
0.035
to 0.134 |
0.005 |
| Over
1-1/8" to 1-1/2", incl |
0.035
to 0.148 |
0.006 |
| Over
1-1/2 " to 2", incl |
0.065
to 0.148 |
0.008 |
| Over
2" to 3", incl |
0.065
to 0.148 |
0.010 |
| Over
3" to 4", incl |
0.065
to 0.148 |
0.020 |
| Grade
Designation |
Yield
Strength, Ksi(Mpa) Min |
Ultimate
Strength, Ksi(Mpa) Min |
Elongation
In 2in. or 50mm, % min |
RB
Min |
RB
Max |
| 1008 |
30
(207) |
42
(290) |
15 |
50 |
... |
| MT
1010 |
|
|
|
|
|
| 1010
|
32
(221) |
45
(310) |
15 |
55 |
...
|
| MT
1015 |
|
|
|
|
|
| 1015 |
34
(241) |
48
(331) |
15 |
58 |
...
|
| MT
X 1015 |
|
|
|
|
|
| MT
1020 |
|
|
|
|
|
| 1020 |
38
(262) |
52
(359) |
12 |
62 |
... |
| MT
X 1020 |
|
|
|
|
|
Ref: ASTM
A 513 - 97
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