TORICH INTERNATIONAL LIMITED
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Welded Steel Tube ASTM A554 Welded Stainless Steel Mechanical Tubing
ASTM A554 WELDED STAINLESS STEEL MECHANICAL TUBING
As-welded or cold-reduced mechanical tubing.
Welded Steel Tube Shapes:
Round, Square, Rectangle, or special.
Welded Steel Tube Dimension:
OD ≤406.4mm
WT ≥0.51mm
Welded Steel Tube Grade:
MT-301, MT-302, MT-304, MT-309S
MT-310S, MT-316, MT-316L, MT-317
MT-321, MT-347, MT-430, MT-430i
Welded Steel Tube Materials and Manufacture:
The tubes are manufactured from flat-rolled steel by automatic welding process.
Welded Steel Tube Delivery Condition:
1. As welded
2. Welded and annealed
3. Cold reduced
4. Cold reduced and annealed
Welded Steel Tube Inside diameter bead:
a. Bead not removed
b. Bead controlled to 0.005 in. (0.13mm) or 15% of the specified wall thickness, whichever is greater
c. Bead removed
Welded Steel Tube Surface Finish:
Tubes surface are free of scale
Welded Steel Tube Packing:
In bundles with outside protection and seaworthy packing
Wooden box, crate, cartons, with a lifts on the bundles for easy loading and unloading
TABLE 1 Chemical Composition
| Grade | Mfg.Process | Chemical composition(%) | |||||||
| C | Si | Mn | P | S | Ni | Cr | Mo | ||
| MT301 | E,AT | 0.15max | 1.00max | 2.00max | 0.040max | 0.030max | 6.0-8.0 | 16.0-18.0 | ---- |
| MT302 | E,AT | 0.15max | 1.00max | 2.00max | 0.040max | 0.030max | 8.0-10.0 | 17.0-19.0 | ---- |
| MT304 | E,AT | 0.08max | 1.00max | 2.00max | 0.040max | 0.030max | 8.0-11.0 | 18.0-20.0 | ---- |
| MT304L | E,AT | 0.035max | 1.00max | 2.00max | 0.040max | 0.030max | 8.0-13.0 | 17.0-19.0 | ---- |
| MT305 | E,AT | 0.12max | 1.00max | 2.00max | 0.040max | 0.030max | 10.0-13.0 | 22.0-24.0 | ---- |
| MT309S | E,AT | 0.08max | 1.00max | 2.00max | 0.040max | 0.030max | 12.0-15.0 | 22.0-24.0 | ---- |
SUPPLEMENTARY REQUIREMENTS:
S1 Hardness Test
S2 Tension Test
S3 Nondestructive Test
S4 Test Report
Referenced Documents:
ASTM Standards:
ASTM A370 Test Methods and Definitions for Mechanical Testing of Steel Products
ASTM E30 Test Methods for Chemical Anaysis of Steel, Cast Iron, Open-Hearth Iron
and Wrought Iron
ASTM E 59 Practice for Sampling Steel and Iron for Determination of Chemical Composition
Military Standards:
MIL-STD-129 Marking for Shipment and Storage
MIL-STD-163 Steel Mill Products Preparation for Shipment and Storage
Federal Standard:
Fed. Std. No. 123 Marking for Shipments
Referenced Documents:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
E30 Test Methods for Chemical Analysis of Steel,Cast Iron,Open-Hearth Iron,and Wrought Iron
E59 Method of Sampling Steel and Iron for Determination of Chemical Composition