loading

/Carbon steel tubes/Cold-drawn Welded Tubes

COLD-DRAWN WELDED TUBES

Marcegaglia cold-drawn welded tubes production is carried out mainly within its Boltiere plant, Europe’s largest specialized unit in the sector, as well as in Marcegaglia-Novero plant in Rivoli, Torino. From here, Marcegaglia regularly supplies the world markets with a specialized production program also tailor-made on customer’s needs, guaranteeing specific mechanical properties for each sales sector allowing price optimizations for the customer value chain.

The fabrication process of cold-drawn or DOM tubes (drawn over mandrel) is carried out according to EN 10305 and the production is tested to match standard and specific requirments of the industry sectors for each steel grade.

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 reduction and environmental safety, the plant has also implemented the ISO 14001 environmental quality system, while workplace health and safety system is ISO 18001 OHSAS certified.

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
COLD-DRAWN TUBES FOR AUTOMOTIVE AND MECHANICAL APPLICATIONS - TECHNICAL CHARACTERISTICS
GRADE E195, E235, E275, E355
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 Structural hollow sections of non-alloy and fine grain steels, hot finished or cold formed and heat treated
OPTIONAL PROCESSING Drawing in reactive oil

Dephosphating

COLD-DRAWN TUBES FOR CARDANS - TECHNICAL CHARACTERISTICS
GRADE E195, E235, E275, E355
TREATMENT +C, +LC, +SR, +A, +N
Dimensions and shapes developed according to customer specifications

Surface finish and special tolerances upon request

READY-TO-USE CYLINDER TUBES - TECHNICAL CHARACTERISTICS
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 TOLERANCE Inside diameter:ISO H9 (ISO H10 for thickness < 4 mm)
SUPPLY CONDITIONS
  • Standard packaging with plastic caps and strapped bundles, standard weight approx. 1500 kg
  • 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 - TECHNICAL CHARACTERISTICS
GRADE E355
TREATMENT +SR
SURFACE FINISHING Outside diameter:
smooth as drawn (EN 10305-2)• Inside diameter:
with stock allowance (for honing
or skiving and roller burnishing)
DELIVERY CONDITIONS
  • Standard packaging with strapped bundles, standard weight approx. 1500 kg
  • 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 - TECHNICAL CHARACTERISTICS
GRADE E355
TREATMENT +SR
SURFACE FINISHING Outside diameter:smooth as drawn (EN 10305-2)

Inside diameter:roughness Ra < 0.40 µ (average 0.15÷0.35 µ)

DIMENSIONAL TOLERANCE Inside diameter: ISO H8
DELIVERY CONDITIONS
  • Standard packaging with plastic caps and strapped bundles, standard weight approx. 1500 kg
COLD-DRAWN TUBES FOR TELESCOPIC CYLINDERS - TECHNICAL CHARACTERISTICS
GRADE E355
TREATMENT +SR
SURFACE FINISHING Outside diameter: smooth as drawn (EN 10305-2)

Inside diameter: roughness Ra < 1.6 µ

• Dimensions and shapes developed according to customer specifications

• Dimensional tolerances upon customer specifications

COLD-DRAWN TUBES SUITABLE FOR CHROME PLATING - TECHNICAL CHARACTERISTICS
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

Żądanie informacji

Name*
Email*
Subject