SECTION TUBE GRADES

304   304L   316   316L   321

UNS S31803   UNS S32205

SECTION TUBE CHEMICAL

Normal Chemical Composition

to ASTM A312  ASTM A790

SECTION TUBE SHAPES

square tube/box section tube/square hollow section tube/metric hollow section tube

rectangle tube/rectangle section tube/rectangular hollow section tube/rectangular hollow tube

polygonal tube / round tube

customized non-standard tube

DELIVERY CONDITION

Hard condition

Solution treat

Bright Annealed

SURFACE FINISH

Pickled surface

Bright Annealed

Dull Polished surface

Mirror Polished surface

120 Grit/180 Grit/220 Grit/300 Grit/400 Grit Polished

PRODUCTION PROCESS

Round Bar > Pipe blank > Cold Drawing

> NDT Testing > Mechanical Testing

Welding to A312 – without Filler Metal.

Welding to A358 – with filler metal.

MECHANICAL PROPERTIES

Intergranular corrosion test according

to ASTM A262 Pratic E.

Walmi Stainless Steel Hollow Bar are used extensively in the industries of Chemical, Petrochemical, Power, Automotive, Marine, Subsea, Offshore, Manufacturing, Pulp and Paper Processing, Food and Beverage processing, Dairy, Dying Industry, Architectural, Textile, Transport Industry, Hardware and Kitchenware Industry and many more.

The stainless hollow bar applications in the specific products can be found in the following:

Valves and actuators
Flow meters / Valves / Strainers / Baskets /

Samplers Pumps and compressors
Vacuum equipment / Hydraulic cylinders / Pump bodies Compression bodies

Axles and shafts
Rollers / Guides / Bushes / Shafts / Collars / Hubs / Bearings

Mechanical seals
Seals / Spacers / Rings

Connection assembly
Fittings / Flanges / Couplings / Connectors

Instrumentation
Sensors / Solenoids / Resistors

Agitation
Stirres / Agitators / Mixers / Blenders / Bottle filling machinery Refridgerators / Butchering / Mincers

Others
Wind mills / Watches

Stainless Steel Hollow Bar is primarily used for the manufacture of radially machined components, a great variety of hollow products and cylindrical components, which will be used in conditions where where corrosion is an issue .The use of Hollow Bar is an economic and efficient means of supplying high quality raw material and a sensible alternative to the use of solid bar as it reduces machining requirements and minimizes material wastage.

Advantages

Specifications:

• Excellent availability, Reduced customer inventories.
• No minimum order, 1 piece stainless steel hollow bar order is accepted by Walmi Stainless Steel.
• Improved cutting speeds and feed rates, better machine utilization and reduced fixed cost per produced stainless steel component.
• Reduced tool wear, lower lubricant usage and machinery maintenance costs, better machine utilization through reduced stoppage time.
• Less machine setting-up time and and machine cycle times, lower labor and overhead costs for each stainless component.
• Faster machining, shorter production time due to excellent and consistent machining properties of stainless steel.
• Easier handling due to lower weight per un-machined component of the hollow bar.
• Very competitive from short to long series production of hollow bar compared to forging.
• shorter production time for hollow bar compared to bore out solid stainless steel bar.
• tangled chips can be avoided Due to limited internal machining