A.L.T.A. S.p.A.

Via Brescia, 6, 21049 Tradate (VA)
Italy
Telephone +39 0331 854011
Fax +39 0331 814990
info@altaspa.com

Hall map

Tube 2018 hall map (Hall 4): stand G08

Fairground map

Tube 2018 fairground map: Hall 4

Our range of products

Product categories

  • 01  Raw materials, tubes and accessories
  • 01.01  Tubes, ferrous and alloys
  • 01.01.01  Carbon content (low)
  • 01  Raw materials, tubes and accessories
  • 01.06  Tubes made from various manufacturing and processing methods (welded, cold and hot drawn, pressed)
  • 01.06.01  Welded steel tubes (also water boiler tubes)

Welded steel tubes (also water boiler tubes)

  • 01  Raw materials, tubes and accessories
  • 01.06  Tubes made from various manufacturing and processing methods (welded, cold and hot drawn, pressed)
  • 01.06.02  Seamless steel tubes
  • 01  Raw materials, tubes and accessories
  • 01.06  Tubes made from various manufacturing and processing methods (welded, cold and hot drawn, pressed)
  • 01.06.04  Precision tubes

Precision tubes

  • 01  Raw materials, tubes and accessories
  • 01.06  Tubes made from various manufacturing and processing methods (welded, cold and hot drawn, pressed)
  • 01.06.13  Bored and grinted mirror finish tubes for hydraulic application

Our products

Product category: Welded steel tubes (also water boiler tubes), Bored and grinted mirror finish tubes for hydraulic application

Welded (ERW DOM) Steel Tubes, Inside Honed, for hydraulic cylinders.

STEEL GRADE:
E 355

EXECUTION:
EN 10305-2: from fine coils, electrowelded and drawn

MECHANICAL PROPERTIES:
TENSILE STRENGTH N/mm² > 600
YIELD STRENGTH     N/mm2 > 520
ELONGATION A5D           % > 10
IMPACT VALUE KCV -20° C. > 27 j.

WELDING FACTOR:
v=1

DIMENSIONAL TOLERANCES:
ON THE OUTER DIAM: EN 10305-2,defects of the outside diameter of any kind, which depth is not exceeding the tolerance foreseen in table 5, will not considered matter of claim, in conformity to the assertion of norm EN 10305-2, paragraphs 8.4.1. - 8.4.1.1. - 8.4.1.2. - 8.4.1.3

ON THE INNER  DIAM: ISO H8 - H11 (related on i.d./wt)
ON THE WALLTHICKNESS:  +/- 3 %
STRAIGHTNESS:  0,5/1000  of the tube length

INNER SURFACE:
ROUGHNESS: 0,3  Mµ Ra max

LENGHTS:
RANDOM LENGTHS FROM 4,5 UP TO 12 MTRS.

PACKING:
ANTIRUST OIL PROTECTION (see TECH AREA), BOTH ENDS CLOSED BY PLASTIC CAPS, BUNDLED.

MARKING:
ON THE WHOLE TUBE LENGTH OR BOTH EXTREMITIES WITH:
 HEAT NUMBER - A.L.T.A.  LOGO

TESTS AND CERTIFICATIONS:
ACCORDING TO EN 10204:2004/3.1 INCLUDING EN 10246-3 and EN 10246-7

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Product category: Seamless steel tubes

Seamless Steel Tubes

Seamless tubes are characterized by high mechanical properties and could be made by special steels upon request.
Dimensional tolerances, surface quality and eccentricity are realized and checked according to the norm UNI EN ISO 10305-1.
A.L.T.A. Spa might supply a very wide range of sizes on request.

By the tube piercing, the mother pipe gets a spiral shape (picture a) which is not a lot modified during the hot rolling and cold drawing process (picture b).

The traditional finishing system called honing and/or roll burnishing, follows the spiral and, even if within the required tolerance, does not modify the defect of spiral shape of the tube against the good function of the cylinder components which requires the perfect coaxiality between rod-piston-cylinder body. The evidence of ALTA finishing system extreme straightness comes out from the picture (c). The machining of a cold drawn tube with a small inside stock allowance shows some raw material stains (the dark spots into the tube of picture c) where the A.L.T.A. Spa machining system was not efficient enough because those raw stain areas were outside the max. allowed straightness tolerance.

To avoid this problem, A.L.T.A. Spa uses tubes with greater inside stock allowance than the norms expects (up to 3 mm on diam.) to grant always perfect straightness, roundness and surface cleaning.

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Product category: Carbon content (low), Seamless steel tubes, Bored and grinted mirror finish tubes for hydraulic application

Seamless Steel Tubes, Cold Drawn, Inside Honed

USE:
THIS PRODUCT SPECIFICATION CONTAINS ALL THE RELEVANT INFORMATIONS NECESSARY FOR THE DESIGN AND MANUFACTURE OF HYDRAULIC CYLINDERS.

MATERIAL:
SEAMLESS COLD DRAWN STEEL TUBES STRESS RELIEVED SR (STANDARD)
OR NORMALIZED N (UPON REQUEST),

STEEL GRADE AND PURPOSES:
E 355 (STANDARD), UPON REQUEST INCLUDING CHARPY TEST BY CUSTOMERS REQUIREMENT
E 410 mod. UPON REQUEST

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About us

Company details

A.L.T.A. Spa is an italian company, established in 1968,to service the needs of the hydraulic cylinder industry. We are one of the largest suppliers in Europe and it is now our aim to become one of the major suppliers worldwide.

A.L.T.A. Spa didn't spare expenses and efforts in continuous research to achieve the highest quality grade and service, which has been universally recognised to enhance our reputation.

Around the end of 1992, A.L.T.A. Spa became one of the first companies in this business sector, to achieve the certification of quality warranty according to ISO 9002 (today UNI EN ISO 9001:2000). Now A.L.T.A. Spa is able to offer to its customers a much more comprehensive range of products in the form of hydraulic package, complemented by products manufactured by other italian companies and tested by A.L.T.A. Spa itselves

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