Food AISI 304L welded steel tube EN 1.4307 For Heat Exchanger 25.4
Steel pipes and steel tubing are a favorite metal supply across
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Electric welded circular cross-section tubes EN10217-7.
Application: electric welded steel tubes to be used under pressure.
Stainless steel types1.4301 and 1.4307 are also known as grades 304
and 304L respectively. Type 304 is the most versatile and widely
used stainless steel. It is still sometimes referred to by its old
name 18/8 which is derived from the nominal composition of type 304
being 18% chromium and 8% nickel.
Type 304 stainless steel is an austenitic grade that can be
severely deep drawn. This property has resulted in 304 being the
dominant grade used in applications like sinks and saucepans.
Type 304L is the low carbon version of 304. It is used in heavy
gauge components for improved weldability. Some products such as
plate and pipe may be available as “dual certified” material that
meets the criteria for both 304 and 304L.
304 has excellent corrosion resistance in a wide variety of
environments and when in contact with different corrosive media.
Pitting and crevice corrosion can occur in environments containing
chlorides. Stress corrosion cracking can occur at temperatures over
304 has good resistance to oxidation in intermittent service up to
870°C and in continuous service to 925°C. However, continuous use
at 425-860°C is not recommended if corrosion resistance in water is
required. In this instance 304L is recommended due to its
resistance to carbide precipitation.
Where high strength is required at temperatures above 500°C and up
to 800°C, grade 304H is recommended. This material will retain
aqueous corrosion resistance.
304 stainless steel readily work hardens. Fabrication methods
involving cold working may require an intermediate annealing stage
to alleviate work hardening and avoid tearing or cracking. At the
completion of fabrication a full annealing operation should be
employed to reduce internal stresses and optimise corrosion
304 stainless steel cannot be hardened by heat treatment.
Solution treatment or annealing can be done by rapid cooling after
heating to 1010-1120°C.
|EN10217-7 Welded Stainless Steel Tube Chemical Requirements (wt%)|
|N||0.10 Max.|| ||0.10 Max|
|Cu||-|| || |
|Other|| || || |
|Welded Stainless Steel Tube EN10217-7|
|Brimingham Wire Gauge|
|WALL THICKNESS (MM) / WEIGHT (KG/M)|
|5/8||15.88||0.455||0.588||0.728|| || |
|3/4||19.05||0.553||0.719||0.895|| || |
Heat Exchanger / Food and Dairy Industry use etc.