Boltiere plant

May 2016

The plant

The Marcegaglia Carbon Steel plant in Boltiere (Bergamo) is dedicated to the manufacturing of welded and seamless cold-drawn precision tubes for automotive, hydraulic and mechanical applications.

The production facility, expanded and upgraded in 2007, is equipped with state-of-the-art machinery and performs a constant activity of research and development on products and processes.

Thanks to its range of solutions tailored on the customers’ specific requirements, Marcegaglia has established long-term partnerships both with OEMs in several sectors and distributors.

The plant has four specific certifications, not only production-related but also in the field of workplace health & safety and environment protection.

Garuva

Düsseldorf

Lyon

Barcelona

Dudley

Kluczbork

Yangzhou

Pune

PraszkaBremen

Gazoldo degli IppolitiHEADQUARTERS

Tezze sul Brenta

Albignasego

Corsico

Osteria Grande

Ravenna

Boltiere

Casalmaggiore

Lomagna

Gazoldo degli Ippoliti

Lainate

Dusino San MicheleContino

Gazoldo degli Ippoliti

Gazoldo degli Ippoliti

Forlì

Outsourcing inox

Munhall

Vladimir

Istanbul

San Giorgio di Nogaro

Marcegaglia group worldwide presence

Cold-drawn welded tubes

Min. diameter (mm) 17

Max. diameter (mm) 245

Min. thickness (mm) 1,5

Max. thickness (mm) 15

Thickness > 15 mm upon request

Main manufacturing standards

MANUFACTURING STANDARD

PRODUCT DESIGNATION

GRADE* TREATMENT

EN 10305-2 Cold-drawn welded tubes

E195E235E275E355

+C Hard. No final treatment after final cold drawing.

+LC Soft. Final heat treatment is followed by a suitable

drawing pass (limited reduction of area).

+SR Stress Relieved. After final cold drawing, the tubes

are stress relieved in a controlled atmosphere.

+A Annealed. After final cold drawing, the tubes

are annealed in a controlled atmosphere.

+N Normalized. After final cold drawing, the tubes

are normalized in a controlled atmosphere.

(*) Upon request: supply of steel grades not included in the above mentioned standards

• tubes for hydraulic applications

• tubes for automotive and mechanical applications

Typical applications

Product range

• Cold-drawn tubes for automotive and mechanical applications

• Ready-to-use cylinder tubes H9

• Cylinder tubes suitable for skiving and roller burnishing or honing

• Skived and roller burnished cylinder tubes H8

• Cold-drawn tubes suitable for chrome plating

• Cold-drawn tubes for telescopic cylinders

• Cold-drawn tubes for cardans

GRADE E195, E235, E275, E355

TREATMENT +C Hard

+LC Soft

+SR Stress Relieved

+A Annealed

+N Normalized

SURFACE FINISHING • Outside diameter and inside diameter: smooth as drawn (EN 10305-2)

• On request: roughness Ra < 0.4 m

DIMENSIONAL TOLERANCE • Standard: according to EN 10305-2

• Special: on request

OPTIONAL PROCESSING • Drawing in reactive oil

• Dephosphating

Cold-drawn tubes for automotive and mechanical applications

GRADE E355

TREATMENT +C Hard

SURFACE FINISHING • Outside diameter: smooth as drawn (EN 10305-2)

• Inside diameter: roughness Ra < 0.80 m (average 0.50÷0.60 m)

DIMENSIONAL TOLERANCE • Inside diameter: ISO H9 (ISO H10 for thickness < 4 mm)

Ready-to-use cylinder tubes H9

GRADE E355

TREATMENT +SR Stress Relieved

SURFACE FINISHING • Outside diameter: smooth as drawn (EN 10305-2)

• Inside diameter: with stock allowance (for skiving and roller burnishing)

Cylinder tubes suitable for skiving and roller burnishing or honing

Skived and roller burnished cylinder tubes H8

GRADE E355

TREATMENT +SR Stress Relieved

SURFACE FINISHING • Outside diameter: smooth as drawn (EN 10305-2)

• Inside diameter: roughness Ra < 0.30 m

DIMENSIONAL TOLERANCE • Inside diameter: ISO H8, min. 40 mm - max. 200 mm

Cold-drawn tubes suitable for chrome plating

GRADE E355

TREATMENT +N Normalized

+SR Stress Relieved

SURFACE FINISHING • Outside diameter: with stock allowance (for subsequent reworking)

• Inside diameter: smooth as drawn (EN 10305-2)

Cold-drawn tubes for telescopic cylinders

GRADE E355

TREATMENT +SR Stress Relieved

SURFACE FINISHING • Outside diameter: smooth as drawn (EN 10305-2)

• Inside diameter: roughness Ra < 1.6 m

DIMENSIONAL TOLERANCE Straightness 0.50 mm/m max

• DIMENSIONS AND SHAPES DEVELOPED ACCORDING TO CUSTOMER SPECIFICATIONS

• SURFACE FINISH AND SPECIAL TOLERANCES UPON REQUEST

Cold-drawn tubes for cardans

GRADE E195, E235, E275, E355

TREATMENT +C Hard

+LC Soft

+SR Stress Relieved

+A Annealed

+N Normalized

• DIMENSIONS AND SHAPES DEVELOPED ACCORDING TO CUSTOMER SPECIFICATIONS

• SURFACE FINISH AND SPECIAL TOLERANCES UPON REQUEST

Production areas

1

3

5

7

2

4

6

8

9 pointing lines

20 pickling tanks

9 drawing benches (including 4 automated lines)

2 heat treatments lines

9 straightening lines10 cutting lines

4 skiving and roller burnishing machines

4 non distructive test lines (eddy current and ultrasonic)

1 Packing line

13

5

8

2

46

7

Quality and environment

Among all the manufacturing companies in the cold-drawn tubes sector, Marcegaglia Boltiere is the first production plant awarded with four quality certifications.The quality system is ISO 9001 certified, while production for the automotive industry is ISO/TS 16949 compliant.Within a corporate policy promoting waste re-duction and environmental safety, Marcegaglia Boltiere has developed ISO 14001 environmen-tal quality system, while workplace health and safety system is ISO 18001 OHSAS certified.

MARCEGAGLIA Boltierevia Marcegaglia, 2 • 24040 Boltiere, Bergamo - Italytel. +39 . 035 419 78 11 • fax +39 . 035 419 78 81boltiere@marcegaglia.com

HEADQUARTERSvia Bresciani, 16 • 46040 Gazoldo Ippoliti, Mantova - Italywww.marcegaglia.com