High Temperature Resistance Nickel Based Alloys W.Nr. 2.4778 Rod
Forging Tube
W.Nr. 2.4778 is a heat-resistant cobalt alloy with excellent
thermal shock resistance and wear resistance performance. We can
supply W.Nr. 2.4778 in forms of Rods, forgings, seamless pipes,
tube and so on.
Chemical Composition (%, EN 10295)
| C | 0.05-0.25 |
| Si | 0.50-1.50 |
| Mn | 1.5 |
| P | 0.04 |
| S | 0.03 |
| Cr | 27-30 |
| Mo | 0.50 |
| Ni | 4.0 |
| Nb | 0.50 |
| Co | 48-52 |
| Fe | Balance |
Shock Resistances
Since thermal shock resistance was given first priority when
developing W.Nr. 2.4778, this alloy shows far more outstanding
thermal shock resistance than the popularly used 25Cr-20Ni
stainless steel. For example, even after repeating the heating and
cooling cycle (1000-water cooling-7 seconds) for 500 times, no
cracking occurred. As a practical example, the alloy was used for
four and a half years as a tray which was heated up to 1000 in a
heavy oil furnace to quench various quenching agents. Hardly any
cracking occurred in W.Nr. 2.4778, whereas the 25Cr-12Ni alloys
were able to be used for only 8 months in average.
Wear Resistances
As for the wear resistance of W.Nr. 2.4778, hardly any
deterioration was found after being used as a sintering bar for
copper sulfide for 50 months. On the other hand, cast iron parts
used till then were heavily corroded, oxidized and worn even though
operations were conducted at 900, making them usable for only three
and a half months.
Weldability
W.Nr. 2.4778 can be welded together by arc or oxy-acetylene
methods. When higher wear resistance is required, weld additionally
with BISHILITE (HARDFACING ALLOYS). When welding W.Nr. 2.4778 to
stainless steel or steel, MA-W welding rod can be used.
Characteristics
High Temperature Resistance, Thermal Shock Resistance , Wear Resistance
Higher melting points than other cobalt based and nickel based
alloys (1380 -1395 °C)
Corrosion resistant in Sparse sulfuric acid and boiling nitric acid
and corrosion rapidly in hydrochloric acid
Equal grades
Thermco50, Co50, Umco50
XUNSHI has strong strength in production of the cobalt alloys,if
you have any request,please feel free to contact us.
About XUNSHI
Suzhou Xunshi New Material Co. Ltd- referred as XUNSHI hereafter,
is a professional manufacturer of high-performance alloy products.
XUNSHI is engaged in supplying high quality and cost-effective
Superalloy, Anti-Corrosion Alloy, Precision Alloy, Special
Stainless Steel and Magnetostrictive Material to customers
worldwide.
Why XUNSHI
· Highly experienced in alloy industry
· Top experts of industry in China
· Advanced technology and process from top famous institutes in
China
· Advanced devices through whole production and inspection process
· Strict quality control system
· Company motto: best service, most value
· Smart sales policy
Service Items of XUNSHI
· Non-standard product research and pre-production
· Fabrication of products
· Cutting, splitting for sheets and plates in stock
· Heat treatment (Solution treatment, aging harden treatment,
anneal, spring temper, quench etc.)
· Surface finish (peeling, gridding, polishing)
· Logistics service
· Customized packing service (also for exporting)
· Import and export (XUNSHI is certificated)
· Document translation
· Hard-to-find material sourcing
Customers of XUNSHI
Customers of XUNSHI are all over China (Taiwan and Hong Kong
included). And we are exporting to USA, Canada, Italy, UK, Poland,
Greece, Russia, Turkey, Iran, Israel, South Africa, South Korea,
North Korea, India, Argentina, and Brazil and so on. Customers from
30+ countries trust us.
Where is XUNSHI
A- XUNSHI is in Huaqiao, Kunshan, 215332 China, which is very
closed to Shanghai.
B- Xunshi is around 80KM from Shanghai Pudong International Airport
(PVG).
C- 20KM from Shanghai Hongqiao Airport
D- 20KM from Shanghai Hongqiao Railway Station
E- You can contact XUNSHI sales for a pickup service.
