CelsaGroup Celsa Huta Ostrowiec Forge Products


Forged Products


Shipbuilding Industry


Build-up Crankshafts

Built- up crankshafts


We manufacture all the range of built-up crankshafts from the most important licensors in final machined condition. In particular we have long experience with:

MAN:S35, L35, S40, S42, S46, S50, S60, L60, S65, S70, L70, K80
Wärtsila: RTA35, RT-flex35, RTA48T, RT-flex48T, RT-flex50, RTA58T, RT-flex58T, RT-flex60C, RTA68, RT-flex68.

Steel grades:

(All according to EN, PN, DIN, NFA, BS, ASTM and other depending on customer demand)

  • Quality carbon steel
  • Alloy steel

Steel melting:

  • Vacuum degassing which provides H2 content below 0,7 ppm; O2 below 25 ppm.
  • We can cast ingots according to two technologies: bottom and vacuum top pouring. We guarantee great steel purity K4<30 acc. to DIN50602; sulfur content < 0,005%.


All the process of final machining is done with specialized machines.

Delivery condition:

Final machined.

Non Destructive Testing:

UT, MT, PT and visual testing

For UT we use state-of-the-art digital defectoscopes produced by the most reputed manufacturers.

Magnetic and Penetration Tests are performed before shaft’s elements assembling. MT is done with a very accurate and modern equipment.

After assembling all connection areas are MT and visually checked.

Visual tests are done with a video endoscope: as well as module boroscope.

Our staff is very well experienced, regularly trained regarding the newest tings which appear in UT and certified according to PN EN473 with level II and III.


The certificates are issued according to the following standards:
PN-EN 10204, 2.2 and 3.1 and 3.2 (LR, GL, DNV, ABS, BV, NKK, RINA, KRS, CCS, RMRS etc.)

CELSA Huta Ostrowiec Sp. z o.o., ul. Samsonowicza 2, 27-400 Ostrowiec Świętokrzyski, Polska   -   Tel +48 41 249 30 00   -   Fax +48 41 249 22 22   
EMail: celsaho@celsaho.com / forgedproducts@celsaho.com
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