SEAMLESS TUBE GRADES

304/304L  316/316L  321  310S  317L

S31803/S32205  S32750  N08904/904L

SEAMLESS TUBE CHEMICAL

Normal Chemical Composition

to ASTM A269  ASTM A790

SEAMLESS TUBE SIZES

ANSI/ASME B36.19

ANSI/ASME B36.10

Walmi Stainless Steel Seamless Tube compliance to standards below:
ASTM A269
EN10216-5
JIS G3459
DIN 17456
GB/T 14976MTC: EN10204:2004 3.1

DELIVERY CONDITION

Cold Drawing/Rolling, Seamless

Solution Heat Treat & Water Quench

PRODUCTION PROCESS

Round Bar > Pipe blank > Cold Rolling

> NDT Testing > Mechanical Testing

TOLERANCE

Outside Diameter, Wall Thickness, Length

tolerances according to ASTM A269

Outside Diameter, Wall Thickness, Length  of

EN10216-5 pipe according to EN ISO 1127

MECHANICAL PROPERTIES

Intergranular corrosion test according

to ASTM A262 Pratic E.

WORKING PRESSURE
The maximum allowable working pressure for seamless stainless steel tubes at room temperature, can be calculated by the following formula:
OD=Outside Diameter (mm) WT=Wall Thickness (mm)
200 * 12 * WT/OD
For example: tube 60.3 *2.77mm
Max. allowable working pressure
= 200 * 12 * 2.77/60.3
=110 kg/cm2

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

Walmi Stainless Steel Seamless tube are austenitic stainless nominal wall thickness tubing for general corrosion-resisting service and low- or high-temperature service. The stainless tubes are used extensively in the following industries:

♦ Automotive

♦ Gas sensors

♦ Gasoline direct injection system

♦ Printing

One-stop service for industrial stainless steel tubular products, including Pipes, Tubes, Butt-Welding Fittings, Forged Piping Flanges and Valves.

Value-added service are available in the following:

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