Stainless Steel Thin Wall Tubes Manufacturer & Stockist

SS Thin Wall Tubes Manufacturer, Stockist & Exporter

Amardeep Steel Centre manufactures, stocks and supplies SS thin wall tubes for applications requiring reduced weight, compact dimensions, dimensional accuracy and efficient heat transfer. Our thin wall stainless steel tubing is available in seamless and welded construction and can be supplied to applicable ASTM and EN standards, including ASTM A269, ASTM A213, ASTM A312 and ASTM A632. We offer a range of stainless steel grades, outer diameters and wall thicknesses for instrumentation, heat exchangers, medical equipment, chemical processing, aerospace and other precision applications.

Technical Data

High-Precision SS Thin Wall Tubing Specifications & Standards

Parameter	Technical Specification
Standard Specifications	ASTM A269 / A269M, ASTM A213 / A213M, ASTM A312, ASTM A632, EN 10216-5
Outer Diameter (OD)	0.5 mm to 101.6 mm (0.019" to 4.0")
Wall Thickness (WT)	0.08 mm to 1.65 mm (25 SWG to 16 SWG)
Manufacturing Process	Cold Drawn Seamless (CDS), Cold Rolled, Electric Resistance Welded (ERW)
Austenitic & Duplex Grades	SS 304, 304L, 316, 316L, 316Ti, 321, 347, 904L, UNS S31803 (Duplex 2205)
Supply Condition	Solution Annealed & Pickled (AP), Bright Annealed (BA), Electropolished (EP)
Lengths	Single Random, Double Random, Cut-to-Length (down to 10 mm), Continuous Coils
Testing & Certification	Hydrostatic Test, Eddy Current Test, Microstructure Analysis, EN 10204 3.1/3.2

Chemical Composition of Stainless Steel Thin Wall Tubes

Grade	Carbon (C) max	Chromium (Cr)	Nickel (Ni)	Molybdenum (Mo)	Other Elements
SS 304	0.08%	18.0 - 20.0%	8.0 - 11.0%	—	General purpose standard grade
SS 304L	0.035%	18.0 - 20.0%	8.0 - 12.0%	—	Low carbon to prevent weld decay
SS 316	0.08%	16.0 - 18.0%	10.0 - 14.0%	2.0 - 3.0%	Moly added for chloride resistance
SS 316L	0.035%	16.0 - 18.0%	10.0 - 14.0%	2.0 - 3.0%	Extra protection against intergranular attack
SS 321	0.08%	17.0 - 19.0%	9.0 - 12.0%	—	Titanium stabilized ($\text{Ti} \ge 5 \times \text{C}$)
SS 347	0.08%	17.0 - 19.0%	9.0 - 13.0%	—	Niobium stabilized ($\text{Nb} \ge 10 \times \text{C}$)

Mechanical Properties of SS Thin Wall Tubes

TYPE	ITEM PER	NOMINAL MECHANICAL PROPERTIES
TYPE	ITEM PER	YIELD PSI	TENSILE PSI	ROCKWELL HARDNESS	ELONG. % IN 2″
304L	Annealed 1/8 Hard	30000 75000	80000 105000	RB75 RB95	55 20
304	Annealed I 1/8 Hard	35000 75000	85000 105000	RB80 RB95	55 20
310	Annealed	45,000	95,000	RB85	45
304H	Annealed	35,000	85,000	RB80	55
21-6-9	Annealed 1/8 Hard	60000 120000	100000 142000	RB9,0 RC30.	45 20
317	Annealed	40,000	90,000	RB85	45
316 316L 316H	Annealed Annealed Annealed	35000 30000 35000	85000 80000 85000	RB80 RB75 RB80	50 50 50
347	Annealed	40,000	95,000	RB85	50
321	Annealed 1/8 Hard	35000 75000	90,000 105000	RB80 RB95	55 20
416	Annealed	35,000	75,000	RB95	20

Equivalent grade of Metric size stainless steel tube

Stainless Steel Thin Wall tube Type	ASTM		Equivalent Standard
Stainless Steel Thin Wall tube Type	Grads (TP)	UNS	Afnor (NF)	EN / Din	JIS
Austenitic	304	S30400	Z 6 CN 18.09	1.4301	SUS 304
304L	S30403	Z 2 CN 18.10	1.4306	SUS 304L
316	S31600	Z 6 CND 17.11	1.4401	SUS 316
316L	S31603	Z 2 CND 17.12	1.4404	SUS 316L
316Ti	S31635	Z 2 CND 17.12	1.4571
321	S32100	Z 6 CNT 18.10	1.4541	SUS 321
347	S34700	Z 6 CNNb 18.10	1.455	SUS 347
304H	S30409	Z 6 CN 19.10	1.4948	SUS 304H
316H	S31609	Z 10 CND 18.10	1.4919	SUS 316H
321H	S32109	Z 10 CND 18.10	1.4941	SUS 321H
Ferritic	405	S40500	Z 6 CAL 13	1.4002	SUS 405
410	S41000	Z 12 C 13	1.4002	SUS 410
430	S43000	Z 10 C 17	1.4016	SUS 430
Duplex	S31803	Z 2 CND 22.06	1.4462
2507	S32750	Z 5 CND 20.12	1.4410
S32760	1.4501

Thin Wall SS Tubing Gauge & Size Dimensions Chart

Outside Diameter (OD)	Wall Thickness (WT)	Standard Gauge (SWG / BWG)	Approximate Weight (kg/meter)
3.18 mm (1/8")	0.36 mm (0.014")	28 SWG	0.025 kg/m
6.35 mm (1/4")	0.51 mm (0.020")	25 SWG	0.074 kg/m
6.35 mm (1/4")	0.89 mm (0.035")	20 SWG	0.122 kg/m
9.53 mm (3/8")	0.89 mm (0.035")	20 SWG	0.193 kg/m
12.70 mm (1/2")	0.89 mm (0.035")	20 SWG	0.263 kg/m
12.70 mm (1/2")	1.24 mm (0.049")	18 SWG	0.356 kg/m
19.05 mm (3/4")	1.24 mm (0.049")	18 SWG	0.553 kg/m
25.40 mm (1.0")	1.24 mm (0.049")	18 SWG	0.751 kg/m
38.10 mm (1.5")	1.65 mm (0.065")	16 SWG	1.507 kg/m
50.80 mm (2.0")	1.65 mm (0.065")	16 SWG	2.032 kg/m

Applications of Stainless Steel Thin Wall Tubes

Drug and Analytical Equipment: HPLC equipment and chromatography tools, laboratory devices
Medical Tools: Fluid-supplying tubes, sensor protection, and precise medical equipment
Car Industry: Fuel spraying tubes, hydraulic control tubes, and sensor casings
Aerospace and Military: Hydraulic control tubes, pressure measurement, and jet engine use
Energy Production: Thermocouple sheath and tubing in boilers and turbines
Navy and Offshore: Anti-defect instrument tubes in environments with chloride
Instrumentation and process control: include pressure measuring methods such as impulse lines that are used in gauges and transmitters.
Oil, gas and petrochemical industry: include use of sampling tubing, chemical injection, and analysis tubings
In refrigeration and HVAC: flow-restricting devices, as well as expansion and evaporator coils, are employed

Frequently Asked Questions - Stainless Steel Thin Wall Tubes

What counts as a thin-wall stainless steel tube?

In general, a tube qualifies as thin-wall if the ratio of outer diameter to wall thickness is equal to or greater than 20:1 and the wall is less than 1.65 mm (0.065"). The purpose of these tubes is to reduce overall weight and increase in flow volume without compromising on structure.

Can you bend thin-wall tubing without crushing it?

Yes, since thin-walled tubing is quite light considering the diameter, you would need a mandrel or support dies to bend such tubing without crushing it. The best thing you can do is use tubing that is soft and annealed and has elongation properties are 35% or more; this ensures that the tube doesn't flatten or crease during the bending process.

How is thin-wall tubing different from capillary tubing?

This depends entirely on the scale of the tubing. Capillary tubing is micro bore tube, generally smaller than 3 mm (1/8") OD, that serves the purpose of metering and sensing pressure. In thin-walled tubing, the purpose of the tubing is reducing the wall thickness as compared to the outer diameter; these tubes vary in size up to 4" OD.

Is it safe to weld thin-wall stainless steel tubes on site?

Yes, since low-carbon grades such as 304L and 316L handle TIG or orbital welding quite well without causing carbide precipitation. You simply have to control your welding current properly.

Get a Quote for SS Thin Wall Tubes

Looking for Stainless Steel Thin Wall Tubing for your application? Amardeep Steel Centre supplies high-precision seamless and welded thin wall SS tubes in grades including 304, 304L, 316, 316L, 321 and 347. Send us your required grade, dimensions and quantity to request a quote.

Stainless Steel Thin Wall Tubes