Metal Stock & Custom Tubing

MicroGroup, part of TE Connectivity, is a leading worldwide distributor of small-diameter / thin walled tubing offering quick shipments from over 7,000,000 feet (2,100,000 meters) in stock — one of the world’s largest inventories — available in alloy 304 and 316 stainless steel tubing, both welded and seamless.

Stock stainless steel and other alloys are typically manufactured to an OD and wall dimensions.

To purchase standard stock tubing please visit our Online Store. For non-stock dimensions see Quick Turn, Custom Sized Tubing.

Certificate of Compliance is available by request with a minimum item order of $400

Stock Tubing Item Code Example

stock tubing order example
Overview Tab w/ General Ordering Info

The above “item code” is an example to assist you in the ordering process. Initially developed as an internal code to accurately specify and control ALL-TUBE inventory, the item code is now widely utilized by MicroGroup customers to quickly and easily identify and specify tubing products.

Material: “Material” specification is required, and can contain any number of digits (text and/or numeric) between one (1) and four (4).

Tolerance Level: “Tolerance Level” is for Fractional Tubing. Please indicate F1 or F2. Click here for tolerance definition.

Nominal OD: “OD” (outside diameter) specification is required and must contain from two (2) to four (4) numeric digits. (i.e., .032″ = 0032, 5mm = 05)

By Sign: Inclusion of a “by sign” (X) is required at this position for most sizes.

Nominal Wall: “Wall” thickness specification is required for most sizes and must contain three (3) numeric digits. (.006″ = 006, .035″ = 035)

Mfg. Type (WD or SL): Welded (WD) or Seamless (SL) material specification is required.

Category: “Category” specification is required and must contain one text digit as follows:

F Fractional
H Hypodermic
M Metric
P Pipe
B Bar/Wire
Comparison of Welded/Drawn and Seamless Tubing

Welded and DrawnSeamless

Lead Time X X
Tolerances X
Concentricity X
Cost X
Availability X X
High Pressure X
ID surface X
Heavy Wall X
Stainless Steel Grades
Grade Material
303 Stainless Steel Bar Stock: High in Corrosion resistance: Typically used in automatic machining operations.
304 Stainless Steel Tubing: Good in Corrosion resistance: Most widely used stainless steel with good formability and can be readily welded.
304L Stainless Steel Tubing: Good in Corrosion resistance: Offers better weld-ability than standard 304 Stainless Steel.
316 Stainless Steel Tubing: Better in Corrosion resistance: Offers higher strength at higher temperature than 304 Stainless Steel. Often used for pumps, valves, marine applications, and chemical equipment.
316L Stainless Steel Tubing: Better in Corrosion resistance:Offers better weld-ability than standard 316 Stainless Steel.
321 Stainless Steel Tubing: Good in Corrosion resistance: Most similar to 304 Stainless Steel but with the addition of Titanium making it an excellent choice for prolonged, high temperature applications.
347 Stainless Steel Tubing: High in Corrosion resistance: High resistance to prolonged heat and corrosion applications. This is well suited for power generation and engine applications.
430 Stainless Steel Tubing: Good in Corrosion resistance:Combines good corrosion and heat resistance with good mechanical properties. Oxidation resistant to 1500 deg F and is used in many industrial and consumer products.
Other Grades Call for availability of other stainless steel tubing alloys
MicroGroup Temper Table
Temper Tensile Min (kpsi) Tensile Max (kpsi)
Anneal N/A 110
1/8 Hard 90 120
1/4 Hard 100 130
1/2 Hard 110 140
3/4 Hard 120 150
Full Hard 140 NA
Other Materials


200 Nickel (“A” Nickel)
600 Inconel Alloy
(Inconel is a registered trademark by Inco Alloys International)
625 Inconel Alloy
(Inconel is a registered trademark by Inco Alloys International)
C276 Hastelloy Alloy
(Hastelloy is a registered trademark of Haynes International)
Ti2 Unalloyed Titanium A-40
6061 Aluminum
101 Copper
122 Copper
Other Grades Call for availability of other Nickel, Inconel, Titanium, Aluminum, Copper, Brass and other specialty metals or alloys