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Double Walled Steel Tubing

Double Walled Steel Tubing
USUI's Double Walled Steel Tube has been recognized in the worldwide industries of automobiles and refrigerators as just the piping material in application of varieties of vehicle lines and components as well as refrigerant condensers and refrigerator parts and have been in full use on production basis.

Features

  • Excellent against pressure resistance.
  • Durable against vibration fatigue.
  • Easy workability by soldering and brazing.
  • Easy fabrication by bending and press forming tube ends.
Quality Characteristics

1.Chemical Composition
C% Mn% P% S%
0.12max. 0.50max. 0.040max. 0.045max.


2.Mechanical Properties(Conforming to JASO M 101-94)
Tensile Strength
MPa		 Yield Point
MPa		 Elongation
%		 Hardness
HV
294min. 176min. 25min. 150max.


3.Standard Size, Allowance and Pressure Performance (Conforming to JASO M 101-94)
Nominal Diameter Outer Diameter
mm		 Wall
Thickness
mm		 Guaranty Pressure
MPa		 Break Pressure
MPa

Base
Size

 Allowance Base
Size		 Allowance
4 4 +0.08 0.7 +0.08 34.3 108
4.76 4.76 34.3 108
6.35 6.35 34.3 83.3
8 8 +0.1 0.7 +0.1 24.5 66.2
10 10 24.5 53.9

For the sizes other than those in the list, please ask USUI for availability.

Applications

USUI's double walled steel tubes are processed through surface treatments suited for tube applications, fabricated by bending, tube end press forming and other works, and then, they shall be transformed into various kinds of tubular products/components.

USUI'S production facilities make it possible to produce and supply variety of products whether they are completed or to be component parts, assembled-bent-brazed-tube end press formed-coated or plated through surface treatment processes.

With expertized knowledge, experience and the facilities for tube forming up to making assembly products, USUI is pleased to be in service to you on the matters of piping and tubular parts assembly works.

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