PRODUCTS
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Stainless steel square tubing in a number of standard sizes and grades, inducing in 304, 304L and 316/316L. Standard finishes include mill finish and 180 Grit (#4 polish) with availability of 240 Grit, 320 Grit and a #8 mirror finish. 30’ sections can be supplied without a girth weld. Nearly any grade of stainless, duplex or nickel alloys can be produced into square structural sections.
Product Introduction
All stainless steel square tubing can be cut to your specific length. Learn more about our laser fused 90 deg cornered stainless structural products ideal for architectural applications.
Processing
PRODUCTION CUTTING / TUBULAR CUTTING / TUBULAR POLISHING
Specifications
- ASTM A554
Value-added Services
Let Kuncheng cut your next stainless square tube requirement to your exact dimensions Large non standard square sections can be manufactured up to 24″ with wall thicknesses up to 1″ thick. Sections up to 40’ long can be manufactured without a girth weld.
MITER CUTTING
Miter cutting creates a joint by cutting two pieces at an angle and fitting them together. The cut is made at a precise angle. Kuncheng can miter cut ornamental tubing to your specifications. Please contact a sales representative for more information.
POLISHING
POSITIVE MATERIAL IDENTIFICATION (PMI)
In some cases, it may be necessary to complete additional positive material identification testing. Kuncheng can complete this testing in house or we can work with an independent laboratory to complete the testing. Please contact us for specific requirements.
Tolerances
Outside Dimension Tolerances:
| Largest Specified Outside Dimension Across Flats, in. | Wall Thickness, In. | +/-, in. Across Flats, Convexity or Concavity incl. |
| To 1 1/4 incl. | all | 0.015 |
| Over 1 1/4 to 2 1/2, incl. | all | 0.02 |
| Over 2 1/2 to 5 1/2, incl. | all | 0.03 |
| Over 5 1/2 to 8, incl. | all | 0.06 |
| Largest Specified Outside Dimension Across Flats, in. | Wall Thickness, In. | +/-, in. Across Flats, Convexity or Concavity incl. |
Straightness Tolerance:
The Straightness tolerance is 0.075 in. in 3ft using a 3ft straightedge and feeler gauge.
Maximum Radii of Corners:
| Wall Thickness | Radii of Cornersmax, in. |
| Over 0.020 to 0.049, incl. | 3/32 |
| Over 0.049 to 0.065, incl. | 1/8 |
| Over 0.065 to 0.083, incl. | 9/64 |
| Over 0.083 to 0.095, incl. | 1/16 |
| Over 0.095 to 0.109, incl. | 13/64 |
| Over 0.109 to 0.134, incl. | 7/32 |
| Over 0.134 to 0.156, incl. | 1/4 |
| Over 0.156 to 0.200, incl. | 3/8 |
| Over 0.200 to 0.250, incl. | 1/2 |
| Over 0.250 to 0.375, incl. | 3/4 |
| Wall Thickness | Radii of Cornersmax, in. |
Squareness of Sides:
+/- B = C * 0.006
Where:
B = tolerance for out of square
C = length of longest side
Application
Quotation Request
Product Introduction
