HOLLOW BAR GRADES

304/304L 316/316L to ASTM A511

Other grades are available

HOLLOW BAR CHEMICAL

Normal Chemical Composition

to ASTM A511  A312

HOLLOW BAR SIZES

Standard hollow bar sizes

Finished part size / chucked true values

Walmi stainless steel hollow bar compliance to standards below:

ASTM A511

ASTM A479

ASME SA-479

NACE MR0175/MR0103

EN 10216-5

EN 10297-2

EN 10294-2

JIS G3446

MTC: EN10204:2004 3.1

HOLLOW BAR GRADES

304/304L 316/316L to ASTM A511

Other grades are available

HOLLOW BAR CHEMICAL

Normal Chemical Composition

to ASTM A511  A312

HOLLOW BAR SIZES

Standard hollow bar sizes

Finished part size / chucked true values

DELIVERY CONDITION

Cold Drawing/Rolling, Seamless

Solution Heat Treat & Water Quench

PRODUCTION PROCESS

Round Bar > Pipe blank > Cold Drawing

> NDT Testing > Mechanical Testing

TOLERANCE

General Requirements:
O.D.   +2/-0%, with a minimum of +1/-0 mm (+0.04/-0”) for 275mm below OD
+/-1%  for 275 mm and above OD (10.827’’)

I.D.   +0/-2%, with a minimum +0/-1 mm (+0/-0.04″).

Straightness deviation:  max. 1.5 mm per 1000 mm (0.059 inch per 3 feet).

Lengths: Random length. Fixed lengths are available if required.

* Tolerance according to ASTM A511 standard can be offered if required.

MECHANICAL PROPERTIES

Intergranular corrosion test according

to ASTM A262 Pratic E.

Walmi stainless steel hollow bars are all of the highest standard and will exceed all standard requirements without a shadow of a doubt.

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

Walmi stainless steel hollow bar is delivered in 2.5m to 6.5m random lengths depending on sizes and grades. Lengths down to 1 m may be included in the delivery.

However, cutting services are available, the stainless hollow bar can be cut to fixed lengths if required. Walmi is committed to improving production economy for you as our customer in the machining industry.

♦ Cutting
♦ Deburring

Walmi  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 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.

The advantages of stainless steel hollow bar can be found below:

♦ 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