Stainless Square / Rectangular Tube

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Our supply of stainless steel square tube and rectangular tube offerings are available in a wide variety of sizes and wall thicknesses.
They are supplied in both mill finish and polished finishes, with the polished finishes including #4, #6 and #8 mirror finish.
They are generally supplied in 20’ random lengths but can be cut to size for orders.
Available Steel Grades: 304, 304L and 316L
We will custom saw cut to length and sell less than full lengths in some sizes.
Mill finish and polished products in stock.
Polishing services are available.
O.D. Thickness(mm)
in mm 0.7 0.8 0.9 1.0 1.2 1.5 2.0 2.5 3.0 4.0 5.0
1/2" x 1/2" 12.7 x 12.7 X X X X X
5/8" x 5/8" 15.9 x 15.9 X X X X X X
　 18.0 x 18.0 X X X X X X X
3/4" x 3/4" 19.0 x 19.0 X X X X X X X
　 20.0 x 20.0 X X X X X X X
7/8" x 7/8" 22.2 x 22.2 X X X X X X X
1" x 1" 25.4 x 25.4 X X X X X X X X X
　 30.0 x 30.0 X X X X X X X X X
1 1/4" x 1 1/4" 31.8 x 31.8 X X X X X X X X
1 1/2" x 1 1/2" 38.1 x 38.1 X X X X X X X X
　 40.0 x 40.0 X X X X X X X
　 50.0 x 50.0 X X X X X X X
2" x 2" 50.8 x 50.8 X X X X X X X
60.0 x 60.0 X X X
70.0 x 70.0 X X X
80.0 x 80.0 X X X X X
90.0 x 90.0 X X X X X
100.0 x 100.0 X X X X X

Tolerance:
Item Side Thickness Diagonal Radii of Corners Straightness Length Flatness
ASTM
A554		 <31.8mm±0.38mm ±10% ≤0.4mm ≤2.5mmR ≤10mm/ 6M +50mm-0mm ±0.15mm
31.8mm~63.5mm±0.51mm
≥63.5mm±0.76mm

ASTM-Standards:
Iron and Steel Products Steel Piping, Steel Tubing, Fittings
ASTM A1016-04a Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
A 213 / A 213M-09 Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
A 268 / A 268M Seamless and welded ferritic and martensitic stainless steel tubing for general service
A 269 / A 269M Seamless and welded austenitic stainless steel tubing for general service
A 312 / A 312M-09 Seamless and welded austenitic stainless steel pipes
A 450 / A 450M-03 Standard Specification for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes
A 511 Seamless stainless steel mechanical tubing
A 789 / A 789M Seamless and welded ferritic-austenitic stainless steel tubing for general service
A 790 / A 790M-08 Seamless and welded ferritic-austenitic stainless steel pipe
U Bend Tubes Standards for U bend Stainless Steel Tubes for Heat Exchanger
*Note: Section Two: Nonferrous Metals Nickel, Cobalt, Lead, Tin, Zinc, Cadmium, Precious, Reactive, Refractory Metals and Alloys; Materials for Thermostats, Electrical Heating and Resistance Contacts, and Connectors

ASME-Standards :
ASME Boiler Pressure Code Section II Part A - Ferrous Material Specification
SA 213 / SA 213M Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
SA 268 / SA 268M Seamless and welded ferritic and martensitic stainless steel tubing for general service
SA 269 / SA 269M Seamless and welded austenitic stainless steel tubing for general service
SA 312 / SA 312M Seamless and welded austenitic stainless steel pipes
SA 511 Seamless stainless steel mechanical tubing
SA 789 / SA 789M Seamless and welded ferritic-austenitic stainless steel tubing for general service
SA 790 / SA 790M Seamless and welded ferritic-austenitic stainless steel pipe

UNI-Standards :
Stainless and heat resisting steels
UNI 6904 Seamless tubes of special alloyed corrosion and heat resisting stainless tubes

GOST-Standards :
Stainless steels
GOST 9940 Seamless stainless steel tubes, hot finished
GOST 9941 Seamless stainless steel tubes, cold and hot finished
TU 14-3-460 Seamless Steel Pipes for Steam Boilers and Pipelines

European-Standards :
Stainless steels
EN 10216-5* Seamless steel tubes for pressure purposes
EN ISO 1127 Seamless stainless steel tubes (Dimensions and weights)
*Note: This European standard is replacing old national standards for pressure purpose (DIN 17458 DIN 17459 NFA 49117 NFA 49217 NFA 49218 BS 3605 BS 3605-1 etc…
All European standards have their own national designation (example NF EN 10216-5 DIN EN 10216-5 BS EN XXXXX UNI EN XXXXX ..)

DIN-Standards:
Stainless steels
DIN 17456 General purpose seamless circular stainless steel tubes
DIN 17458 Seamless circular Austenitic stainless steel tube subject to special requirement
DIN 17459 Seamless Circular High Temperature Austenitic Stainless Steel Tube Subject To Special Requirement

JIS-Standards:
Stainless steels
JIS G 3459 Stainless steel pipes
JIS G 3463 Stainless steel boiler and heat exchanger tubes

Stainless Steel Rectangular Tubes (Polished / Matt Finish)
Specifications: CNS 5802, JIS G3446 and ASTM A554
O.D.(in) Thickness(mm)
0.7 0.8 0.9 1.0 1.2 1.5 2.0 2.5 3.0 4.0 5.0
10X20 X X X X X X X
10X25 X X X X X X X
10X30 X X X X X X X
13X26 X X X X X X X
15X30 X X X X X X X
20X40 X X X X X X X
25X50 X X X X X X X
30X60 X X X X X X X
40X80 X X X X X
45X75 X X X X X
45X95 X X X X X
50X100 X X X X X
60X120 X X X X X
Tolerance:
Item Outside diameter Thickness Digonal Edge Radius Radii of Corners Straightness Length Flatness
ASTM A554 <31.8mm±0.38mm ±10% ≤0.4mm ≤2.5mmR ≤10mm/ 6M +50mm-0mm ±0.15mm
31.8mm~63.5mm±0.51mm
≥63.5mm±0.76mm

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