Products / Alloy Steel / Square tubing
| CFERW | Cold Formed Electric Resistance Welded |
|---|---|
| Mechanical | Sizes under 2" outside diameter |
| Structural | Sizes 2" outside diameter & over with walls 3/16" & thicker |
| Square Tubing *Approimate ID dimension does not allow for ID weld bead. |
|||
OD |
WALL |
ID |
LBS/FT |
| 1/2 | .065 |
.37 |
.39 |
| 3/4 | .065 |
.62 |
.69 |
.083 |
.58 |
.75 |
|
.120 |
.51 |
1.03 |
|
| 1 | .065 |
.87 |
.83 |
.083 |
.83 |
1.03 |
|
.120 |
.76 |
1.44 |
|
| 1 1/4 | .065 |
1.12 |
1.05 |
.083 |
1.08 |
1.32 |
|
.109 |
1.03 |
1.69 |
|
.120 |
1.01 |
1.84 |
|
.188 |
.87 |
2.40 |
|
| 11/2 | .065 |
1.37 |
1.27 |
.083 |
1.33 |
1.60 |
|
.120 |
1.26 |
2.25 |
|
.188 |
1.12 |
3.35 |
|
.250 |
1.00 |
4.00 |
|
| 1 3/4 | .083 |
1.58 |
1.88 |
.120 |
1.51 |
2.66 |
|
| 2 | .065 |
1.87 |
1.71 |
.083 |
1.83 |
2.16 |
|
.120 |
1.76 |
3.05 |
|
OD |
WALL |
ID |
LBS/FT |
| 2 | .188 |
1.50 |
4.32 |
.250 |
1.75 |
5.41 |
|
| 2 1/4 | .250 |
1.75 |
7.00 |
| 2 1/2 | .120 |
2.26 |
3.90 |
.188 |
2.12 |
5.59 |
|
.250 |
2.00 |
7.11 |
|
| 3 | .083 |
2.83 |
3.29 |
.120 |
2.76 |
4.75 |
|
.188 |
2.62 |
6.87 |
|
.250 |
2.50 |
8.81 |
|
| 3 1/2 | .120 |
3.25 |
5.68 |
.188 |
3.12 |
8.15 |
|
.250 |
3.00 |
10.51 |
|
| 4 | .120 |
3.76 |
6.40 |
.188 |
3.62 |
9.42 |
|
.250 |
3.50 |
12.21 |
|
.375 |
3.25 |
17.21 |
|
| 5 | .250 |
4.50 |
15.62 |
| 6 | .188 |
5.64 |
14.53 |
.250 |
5.50 |
19.02 |
|
| 8 | .250 |
7.50 |
25.82 |
10 |
.250 |
9.50 |
32.63 |
Specifications
| Grade | Class | Type | Specification |
|---|---|---|---|
| 1010 | CFERW | Mechanical | ASTM-A-513, Type 1 or 2 |
| A500B | CFERW | Structural | ATSM-A-500, Grade B |
| Chemical Composition | ||||
|---|---|---|---|---|
| Grade Designation | Chemistry-Ladle Analysis | |||
| Carbon | Manganese | Phosporous | Sulfur | |
| A501 (A36) | 0.26% max | - | 0.04% max | 0.05% max |
| A500A | 0.26% max | - | 0.04% max | 0.05% max |
| A500B | 0.26% max | - | 0.04% max | 0.05% max |
| A500C | 0.23% max | 1.35% max | 0.04% max | 0.05% max |
Copper, when copper steel is specified, 0.20% minimum. |
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| Mechanical Properties | ||||
| Grade Designation | Grade | Tensile Strength | Yield Strength Minimum | Elongation In 2 Inches Minimum |
| Condition | Minimum | |||
| A501 (A36) | Hot Formed | 58,000 psi | 36,000 psi | 23% |
| A500A | Cold Formed | 45,000 psi | 39,000 psi | 25% |
| A500B | Cold Formed | 58,000 psi | 46,000 psi | 23% |
| A500C | Cold Formed | 62,000 psi | 50,000 psi | 21% |
Stock is usually cold formed welded A500B steel. |
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Mechanical Tests Specified
| Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test | |
| For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested. | |
| For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe. | |
| Notes for Hardness Test: | P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. |
| Notes for Bend Test: | For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test. |
| Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser. | |
| The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion. | |
| The inside diameter of the bend shall be 1 inch [25 mm]. | |
| Hydrostatic Test | Each length of pipe shall be Hydro tested, at option of manufacture nondestructive electric testing can be used. |
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