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Boltiere plant
May 2016
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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.
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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.
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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
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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
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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
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• tubes for hydraulic applications
• tubes for automotive and mechanical applications
Typical applications
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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
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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
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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
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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
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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
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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)
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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
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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
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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
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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.
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MARCEGAGLIA Boltierevia Marcegaglia, 2 • 24040 Boltiere, Bergamo - Italytel. +39 . 035 419 78 11 • fax +39 . 035 419 78 [email protected]
HEADQUARTERSvia Bresciani, 16 • 46040 Gazoldo Ippoliti, Mantova - Italywww.marcegaglia.com