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Properties

Bending Stainless Steel






Stainless steel can be formed in the same way and using the same type of equipment as for other alloy steel. Some differences in technique apply and these are explained below. The information in this article is specifically directed towards austenitic stainless steel, the most frequently used family of stainless steel.

Austenitic stainless steel exhibit strong work hardening characteristics which affect many of the forming techniques. Machinery power levels need to be increased or existing capability levels down-rated compared with carbon steel. A higher rigidity of tools and machinery is necessary for working stainless steel.

All fabrication processes should be carried out in a cleaning, and if possible, a dedicated environment.

Bending flat material and bars

Stainless Steel Flat sheet/plate and bar products can be bent using the pressure brake or bend machine. The work should be executed as quickly as possible due to work hardening characteristics of stainless steel, and a degree of over bending is necessary to counteract the springback of the bend. Inside radii of bends sharper than a figure equal to the material thickness under consideration should not be attempted.

Tube bending

Numerous architectural and process applications of tubular pipework and bends exist. In the bending of tube, guidelines can be set down, but first hand experience has to be gained to achieve regular reliable results.

Tubes can be bent satisfactorily using Rotary Bending machines, where one end of the straight stainless steel tube is clamped and the machine former rotates to pull the tube to the designed radius. Alternatively, bending in a hydraulic pressure will push a radiused head on to the tube to force the tube into roller dies.

In considering either in-house or sub-contract tube bending, the quantity involved will have a significant bearing, as will the complexity of the final shapes.

Centre-line bend radii of 2 x tube diameter are generally considered to be a minimum for stainless steel materials.

U bend Stainless Steel Tubes
Related References:
1. Heat exchanger Tube
2. Pipe and Tube Bender
3. U Tube heat exchanger
4. U bend Stainless Steel Tube
5. ASTM A556M
6. ā€œUā€ Bent Cold Drawn Stainless Steel Tube
7. Bend Testing
8. Bend Tubing Happens
9. Bending Stainless Steel


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321 321H Stainless Steel
347 347H Stainless Steel
904L N08094 Seamless Tubes
17-4 PH 630 UNS S17400 Stainless Steel
253MA S30815 Stainless Steel Tube
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2205 Duplex Pipe Tubing
S32101 Stainless Steel
S32304 Stainless Steel
2507 Super Duplex Pipe
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1.4462 Stainless Steel Pipe
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EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
N08810 Incoloy 800H Tube
N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube