ship building

OSNA®-10 AND OSNA®-30 .

Marine applications

Our Division Marine applications specializes in the production of copper base alloys for piping systems in shipbuilding, offshore installations and other marine applications.

The sea and its atmosphere is one of the most corrosive environments on the earth. Seagoing vessels need large amounts of seawater daily for

  • fire water systems
  • sprinkler systems
  • cooling systems
  • ballast systems

The materials used for seawater piping systems must therefore be highly resistant to cavitation erosion, crevice and galvanic corrosion as well as stress corrosion cracking. Moreover such materials must satisfy high standards in terms of hot and cold working properties and weldability.

Quality

A KME Special Products & Solutions Quality management system has been set up, implemented and certified to DIN EN ISO 9001 by LLOYD’S REGISTER QUALITY ASSURANCE. Our Quality Management System comprises process-integrated quality controls, internal product and system audits, the systematic training of all employees and the operation of computer-aided statistical methods. Our results have been surpassing the requirements of national and international standards for years.

PROPERTIES AND ADVANTAGES OF COPPERNICKEL ALLOY

For decades, seawater pipe systems made of copper-nickel alloys have been put to successful use on seagoing vessels and offshore production units like platforms, drilling rigs, semisubmersibles FPSOs etc.

The chemical composition of OSNA® -10 (CuNi 90/10) and OSNA® -30 (CuNi 70/30) copper-nickel alloys have been modified so that they meet the requirements of all the main international standards (see tables below). Reduced tolerance limits for certain impurities moreover provide for an enhanced cold workability and weldability of KME’s alloy.

OSNA® -10 other OSNA® -30 seawater pipes are manufactured in two configurations: seamless other seam welded .

Despite the rough conditions in marine service and the highly corrosive nature of seawater, the products provide well balanced combination of technical and economical advantages:

  • Simple alloying system with good weldability
  • Excellent ductility and toughness
  • Outstanding erosion corrosion performance
  • Resistant to uniform and localized corrosion
  • No effect of ambient seawater temperatures
  • No effect of seawater chlorination
  • Resistant to biofouling
  • Resistant to stress-corrosion cracking
  • Low maintenance costs
  • A lot of design experience
OSNA ® -10 (CuNi 90/10) OSNA ® -30 (CuNi 70/30)
  • 6-457mm OD seamless
  • up to 1200 mm OD seam-welded
  • 6-323.9mm OD seamless
  • up to 1200 mm OD seam-welded

international standards

  • DIN CEN/TS 13388 (CW352H)
  • DIN 86019 2.1972
  • BS 2871 CN 102
  • EEMUA 144 US7060x
  • ASTM-B-466 C 70600
  • MIL-T-16420 KC 70600
  • JIS H 3300C 7060T

international standards

  • DIN CEN/TS 13388 (CW354H)
  • EN 12449
  • ASTM-B-466 C 71500
  • MIL-T-16420 KC 71500
  • JIS H 3300C 7150T

Besides pipes, KME offers a comprehensive range of fittings in different sizes and dimensions, enabling seawater pipe systems to be constructed for different applications.

COMPARISON OF STANDARD SPECIFICATIONS FOR OSNA®-10* (CUNI 90/10)

KME Alloy
OSNA® -10
(CuNi 90/10)
DIN CEN/TS
13388
CW352H
DIN 86019
WL 2.1972
BS 2871 (1)
CN 102
EN 12449 EEMUA
144-1987
US C 7060x
MIL-T-16420K
ASTM B 466 (2)
C70620
JIS H3300
C 7060 T
Ni % 10.0 – 11.0 9.0 – 11.0 9.0 – 11.0 10.0 – 11.0 9.0 – 11.0 10.0 – 11.0 9.0 – 11.0 9.0 – 11.0
Fe % 1.5 – 1.8 1.0 – 2.0 1.5 – 1.8 1.0 – 2.0 1.0 – 2.0 1.5 – 2.0 * 1.0 – 1.8 1.0 – 1.8
Mn % 0.6 – 1.0 0.5 – 1.0 0.5 – 1.0 0.5 – 1.0 0.5 – 1.0 0.5 – 1.0 Max. 1.0 0.2 – 1.0
C% Max. 0.02 Max. 0.05 Max. 0.05 Max. 0.05 Max. 0.05 Max. 0.05 Max. 0.05
Pb% Max. 0.01 Max. 0.02 Max. 0.01 Max. 0.01 Max. 0.02 Max. 0.01 Max. 0.02 Max. 0.05
S% Max. 0.005 Max. 0.05 Max. 0.005 Max. 0.05 Max. 0.05 Max. 0.02 Max. 0.02
p% Max. 0.02 Max. 0.02 Max. 0.02 Max. 0.02 Max. 0.02 Max. 0.02
Zn % Max. 0.05 Max. 0.50 Max. 0.05 Max. 0.50 Max. 0.20 Max. 0.50 Max. 0.50
Sn % Max. 0.03 Max. 0.03
other imp. Max. 0.20 Max. 0.20 Max. 0.20 Max. 0.30 Max. 0.20 Max. 0.30
Cu % rem. rem. rem. rem. rem. rem. rem. +Ni+Fe+Mn
at least 99.5

(1) no longer valid
(2) equal to C 70600 for subsequent welding
* the iron content has been specified to improve corrosion resistance

COMPARISON OF STANDARD SPECIFICATIONS FOR OSNA®-30* (CUNI 70/30)

 

KME Alloy
OSNA® -30
(CuNi 70/30)

DIN CEN/TS 13388
CW354H

BS 2871 (1)
CN 107

EN 12449

MIL-T-16420K
ASTM B 466 (2)
C71520

JIS H3300
C 7150 T

Ni %

30.0 – 32.0

30.0 – 32.0

30.0 – 32.0

30.0 – 32.0

29.0 – 33.0

29.0 – 33.0

Fe %

0.6 – 1.0

0.4 – 1.0

0.4 – 1.0

0.4 – 1.0

0.4 – 1.0

0.4 – 1.0

Mn %

0.5 – 1.0

0.5 – 1.5

0.5 – 1.5

0.5 – 1.5

Max. 1.0

0.2 – 1.0

C%

Max. 0.04

Max. 0.05

Max. 0.05

Max. 0.05

Max. 0.05

 

Pb%

Max. 0.01

Max. 0.02

Max. 0.03

Max. 0.02

Max. 0.02

Max. 0.05

S%

Max. 0.01

Max. 0.05

Max. 0.02

Max. 0.05

Max. 0.02

 

p%

Max. 0.01

Max. 0.02

Max. 0.02

Max. 0.02

Max. 0.02

 

Zn %

Max. 0.20

Max. 0.50

Max. 0,50

Max. 0.50

Max. 0.50

Max. 0.50

Sn %

 

Max. 0.05

 

Max. 0.05

 

 

other imp.

Max. 0.30

Max. 0.20

Max. 0.30

Max. 0.20

 

 

Cu %

rem.

rem.

rem.

rem.

rem.

+Ni+Fe+Mn

 

 

 

 

 

 

at least 99.5

(1) no longer valid

(2) equal to C 71500 for subsequent welding