PRECISION TUBE GRADES

304/304L  316/316L  321  310S  317L

S31803/S32205  S32750  N08904/904L

PRECISION TUBE CHEMICAL

Normal Chemical Composition

to ASTM A312  ASTM A790

PRECISION TUBE SIZES

OD. 6mm/0.236in-168mm/6.614in.

WT. 0.5mm/0.02in-20mm/0.787in.

Walmi stainless steel precision tubes compliance to standards below:

ASTM A269

ASME SA269

ASTM A213

ASME SA213

EN 10216-5  D4/T4

EN ISO1127  D4/T4

MTC: EN10204:2004  3.1

DELIVERY CONDITION

Hard, Half-hard, Bright annealed
or Solution heat treat & quench
(depending on the sizes and application)

SURFACE FINISH

Ground, Polished, Bright annealed or Pickled

(depending on the sizes and application)

PRODUCTION PROCESS

Seamless tube, cold finished > annealed

> NDT Testing > Mechanical Testing

Welded tube > Re-drawn cold finished > annealed

or not > NDT Testing > Mechanical Testing

TOLERANCE

Outside diameter (OD). +/- 0.05mm (0.002 in.)

Inside diameter (ID). +/- 0.05mm (0.002 in.)

Wall thickness (WT). +/- 7.5%

Other tolerance requirements can be offered on request.

MECHANICAL PROPERTIES

Intergranular corrosion test according

to ASTM A262 Pratic E

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

Walmi Stainless Steel Precision tubes are charactrized by high precision dimension tolerances, which are extensively used in the following industries:

♦ Aerospace

♦ Medical device

♦ Nuclear power generation

♦ Chemical process

♦ Hydraulic & instrumentation

♦ Military tubing

♦ Automotive

♦ Gas sensors

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