/Carbon steel tubes/Cold-drawn Welded Tubes

COLD-DRAWN WELDED TUBES

The world’s widest range of cold-drawn welded tubes

The Marcegaglia Carbon Steel plants in Boltiere (Bergamo) and Rivoli (Turin) produce the world’s widest range of cold-drawn welded tubes, products with extremely advantageous characteristics.

Full body normalizing of the shell stock after welding, in fact, ensures that both the welding and the surrounding areas are metallographically and mechanically homogeneous with the rest of the tube, returning a product with an improved quality surface, reduced eccentricity and greater toughness at low temperatures.

Cold drawn tubes are controlled during the entire manufacturing process with full body ultrasonic tests, to guarantee the high quality standards that are typical of all Marcegaglia products.

Marcegaglia Carbon Steel production is characterized by a dimensional range with an external diameter from 15 mm to 245 mm and thicknesses from 1.5 mm to 15 mm.

The production range includes tubes for cylinder ready to use H9, tubes for cylinders suitable for honing or skiving & roller burnishing, tubes for cylinders finished H8, tubes for telescopic cylinders, tubes for piston rods, tubes for automotive and mechanical applications, tubes for cardan shafts.

All products are conforming to the manufacturing standard EN 10305-2 in the following grades: E195, E235, E275, E355, E460.

Marcegaglia once again stands out for the variety of its products, suitable to satisfy every industrial sector with different solutions, always guaranteeing high quality standards.

MANUFACTURING STANDARD
 PRODUCT DESIGNATION
EN 10305-2 Cold-drawn welded tubes
SUPPLY CONDITIONS
  • Tubes are supplied in 5000/8000 mm lengths unless otherwise specified in order
  • Dimensional tolerances according to manufacturing standard
  • Special tolerances upon request
  • Control documents 2.1, 2.2, 3.1, 3.2 according to EN 10204 and other specific norm requirements
STANDARD AND OPTIONAL TESTING
  • Visual and dimensional test 100%
  • Eddy current test 100% acc. to EN 10246-3
  • Ultrasonic test 100% acc. to EN 10246-7
  • Chemical composition
  • Impact test
STANDARD PACKAGING
STRAPPED BUNDLES * Standard weight: approx. 1.5 tonnes

Maximum weight: 2 tonnes

* Each package is identified for complete tracking

OPTIONS

  • Internal and external oiling, for temporary storage
  • Aluminum-plastic foil
  • Plastic caps at the ends
  • Special packaging for sea shipments

Non-standard packaging is developed according to customer request
READY-TO-USE CYLINDER TUBES H9
EN 10305-2
GRADE E355
TREATMENT +C
SURFACE FINISHING Outside diameter: smooth as drawn (EN 10305-2)

Inside diameter: roughness Ra < 0.80 µ
(average 0.50÷0.60 µ)
DIMENSIONAL TOLERANCES Outside diameter: 50% EN 10305-2

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

Eccentricity:  < 3%

Straightness: 1:1000 mm
SUPPLY CONDITIONS
  • Commercial lengths 5000-8000 mm, custom lengths upon request
  • Surface protection
  • Marking: MM E355 OD x ID EN 10305-2 +C – Heath
CYLINDER TUBES SUITABLE FOR HONING, SKIVING AND ROLLER BURNISHING
EN 10305-1/2
GRADE E355
TREATMENT +SR
SURFACE FINISHING Outside diameter: smooth as drawn (EN 10305-2)
Inside diameter: with stock allowance
(skiving and roller burnishing)
DIMENSIONAL TOLERANCES
 Outside diameter 50% EN 10305-2
Eccentricity < 3%
Straightness 1:1000 mm
DELIVERY CONDITIONS
  • Commercial lengths 5000-8000 mm, custom lengths upon request
  • Surface protection
  • Marking: Marcegaglia E355 OD x WT – EN10305-2 +SR – Heath
SKIVED AND ROLLER BURNISHED CYLINDER TUBES H8
EN 10305-2
GRADE E355
TREATMENT +SR (BKS)
SURFACE FINISHING Outside diameter: smooth as drawn (EN 10305-2)

Inside diameter: skived and roller-burnished H8 Ra max 0.3 μ
DIMENSIONAL TOLERANCE Inside diameter: ISO H8, min. 40 mm – max. 220 mm
COLD-DRAWN TUBES FOR TELESCOPIC CYLINDERS
EN 10305-2
GRADE E355
TREATMENT +SR
SURFACE FINISHING Outside diameter: smooth as drawn (EN 10305-2)

Inside diameter: roughness Ra < 1.6 m
DIMENSIONAL TOLERANCES Straightness: 0,50 mm/m max

• Dimensions and shapes developed according to customer specifications

• Dimensional tolerances upon customer specifications
COLD-DRAWN TUBES SUITABLE FOR CHROME PLATING
EN 10305-2
GRADE E355
TREATMENT +N, +SR
SURFACE FINISHING Outside diameter:  with stock allowance
(for subsequent reworking)
Inside diameter: smooth as drawn
(EN 10305-2)
OUTSIDE DIAMETER TOLERANCE
Outside diameter mm Wall thickness mm Tolerance (1/100 mm)
20 ÷ 28 2,5 ÷ 4 +0,15 +0,35
30 ÷ 38 3 ÷ 7,5 +0,20 +0,40
40 ÷ 45 4 ÷ 7,5 +0,20 +0,40
50 ÷ 63 4 ÷ 7,5 +0,25 +0,45
65 ÷ 75 5 ÷ 10 +0,25 +0,50
80 ÷ 95 5 ÷ 10 +0,30 +0,60
100 ÷ 115 5 ÷ 12,5 +0,35 +0,70
120 ÷ 130 5 ÷ 12,5 +0,40 +0,80
135 ÷ 140 5 ÷ 15 +0,45 +0,90
145 ÷ 155 6 ÷ 15 +0,45 +0,90
160 ÷ 170 6 ÷ 15 +0,50 +1,00
175 ÷ 185 7,5 ÷ 15 +0,50 +1,00
190 ÷ 200 7,5 ÷ 15 +0,60 +1,20
205 ÷ 220 10 ÷ 15 +0,60 +1,20
COLD-DRAWN TUBES FOR AUTOMOTIVE AND MECHANICAL APPLICATIONS
EN 10305-2
GRADE E155, E195, E235, E275, E355, E410
TREATMENT +C, +LC, +SR, +A, +N
SURFACE FINISHING Outside diameter and inside diameter:
smooth as drawn (EN 10305-2)
On request: roughness Ra < 0.4 µ
DIMENSIONAL TOLERANCE Standard: according to EN 10305-2
Special: on request
OPTIONAL PROCESSING Drawing in reactive oil
Dephosphating
COLD-DRAWN TUBES FOR CARDANS
EN 10305-2
GRADE E235, E355
TREATMENT +C, +LC, +N
• Dimensions and shapes developed according to customer specifications

• Dimensional tolerances upon customer specifications

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