Description
Stellite 21 Chrome Steel Balls Valve Seats
- We produce high temperature Superalloy Cobalt Valve Seats and Valve Balls with high precision.
- Cobalt alloy valve balls and seats are produced with cast and metallurgic powder process.
- Stellite21 high wear Co balls and seats are used for oil and gas industries.
Stellite 21 Chrome Steel Balls Valve Seats is made from is a hard alloy ,that can withstand various types of abrasion ,
and corrosion as well as high temperature oxidation.The cobalt-base alloy was invented by American Elwood Hayness in 1907.
The Stellite alloy has major component of cobalt, containing a considerable amount of nickel, chromium,
tungsten and a small amount of molybdenum, niobium, tantalum, titanium, lanthanum, etc..Occasionally it contains an alloy of iron.
According to the composition of the alloy, they can be made into wire, powder for hard surface surfacing, thermal spraying, spray welding,
etc.. It also can be made into cast forging parts and powder metallurgy parts.
Chemical compositions and properties (%)
| Brand | C | Si | Cr | Ni | Mo | W | Co | Fe | P | S | Density (g/cm3) | Hardness (HRC) |
| TOPS 21 | 2.2-3.0 | ≤2.0 | 30-34 | ≤3.0 | ≤1.0 | 14-18 | Bal. | ≤3.0 | ≤0.05 | ≤0.05 | 8.65 | 53-59 |
Stellite 21 Chrome Steel Balls Valve Seats Application and Advantage:
1. Valve balls and valve seats are widely used in pipeline valve.
2.Valve Ball and Seat performance directly affects the use effect and service life of the pipeline valve.
3.Each ball-and-seat combination is vacuum tested to ensure a perfect seal is obtained in all positions of contact.
Our Photos for Stellite 21 Chrome Steel Balls Valve Seats:
Standard for Stellite 21 Chrome Steel Balls Valve Seats:
| Valve Seats | Co | Cr | C | W | Mo | Ni | Si | B | Fe | Mn | Others |
| STELLITE 1 | BAL | 33 | 2.45 | 13 | – | 2.5* | 1 | – | 2.5* | 1 | – |
| STELLITE 3 | BAL | 31 | 2.5 | 13 | – | 2.5* | 1 | – | 2.5* | 1 | – |
| STELLITE 4 | BAL | 31.5 | 1 | 14 | – | 2.0* | 1 | – | 2.0* | 1 | – |
| STELLITE 6 | BAL | 28 | 1.2 | 5 | – | 3.0* | 1 | – | 2.5* | 1 | – |
| STELLITE 12 | BAL | 29 | 1.85 | 9 | – | 2.5* | 1 | – | 2.5* | 1 | – |
| STELLITE 20 | BAL | 33 | 2.45 | 17.5 | – | 2.5* | 1 | – | 2.5* | 1 | – |
| STELLITE 21 | BAL | 27 | 0.25 | – | 5.5 | 2.5* | 1 | – | 3.0* | 1 | – |
| STELLITE 31 | BAL | 26 | 0.5 | 7.5 | – | 10.5 | 1 | – | 2.0* | 1 | – |
| STELLITE 190 | BAL | 26 | 3.3 | 14 | – | 1.0 | 1 | – | 8.0 | 0.5 | – |
| STELLITE 238 | BAL | 26 | 0.1 | – | 3 | – | 1 | – | 20.0 | 1 | – |
| STELLITE 306 | BAL | 25 | 0.4 | 2 | – | 6.0 | 1 | – | 4.0* | 1 | Nb=5 |
| STELLITE 694 | BAL | 28 | 1 | 19 | – | 5.0 | 1 | – | 2.5* | 1 | V=1 |
| STELLITE F | BAL | 25.5 | 1.75 | 12.25 | – | 22.5 | 1 | – | 1.5* | – | – |
| STELLITE SF1 | BAL | 19 | 1.3 | 13 | – | 13 | 3 | 2.5 | 3* | 0.5 | Cu=0.5 |
| STELLITE SF6 | BAL | 19 | 0.7 | 7 | – | 13 | 2.5 | 1.7 | 3* | 0.5 | Cu=0.5 |
| STELLITE SF12 | BAL | 19 | 1 | 9 | – | 13 | 3 | 2 | 3* | 0.5 | Cu=0.5 |
| STELLITE SF20 | BAL | 19 | 1.5 | 15 | – | 13 | 3 | 3 | 2* | 0.5 | Cu=0.5 |
| TRIBALOY T400 | BAL | 8 | 0.1* | – | 28 | 3* | 2.4 | – | 3* | – | – |
| TRIBALOY T800 | BAL | 17 | 0.1* | – | 28 | 3* | 3.2 | – | 3* | – | – |
| DELORO 15 | – | – | 0.06* | – | – | BAL | 2.0 | 1.05 | 1.5* | 20 | Cu=20 |
| DELORO 22 | – | 0.70 | 0.10 | – | – | BAL | 2.3 | 1.75 | – | – | – |
| DELORO 40 | – | 7.0 | 0.10 | – | – | BAL | 3.5 | 2.25 | – | – | – |
| DELORO 50 | – | 10.25 | 0.45 | – | – | BAL | 4.0 | 1.85 | 4.0 | – | – |
| DELORO 60 | – | 14.25 | 0.6 | – | – | BAL | 2.0 | 3.5 | 4.0 | – | – |
| DELORO 625 | – | 22 | 0.1 | – | 9 | BAL | – | – | 5 | – | – |
| NISTELLE C | – | 16.5 | 0.12* | 4.5 | 17 | BAL | 0.7 | – | 6.0 | – | – |
| TRIBALOY T700 | – | 15 | 0.10* | – | 32 | BAL | 3.25 | – | – | – | – |
Our Experience
- 13 Year Experience in Heat-resistant Steel Field
- 18 Year Expertise in Wear-resistant Material Field
- 20 Year Customer-made High Quality Castings & Forgings
Trading Terms:
- The nearest seaport: Shanghai port
- The nearest airport: Shanghai Pudong airport
- Payment Terms:L/C,TT,West Union,Paypal
- Payment Condition:50% before production, 50% before delivery against complete set of inspection report
- Supply Capability: 10,000 tons per year
- Sample Availability: yes
- Sample Time:15-30 Days
- Packing: Plywood Cases or Steel Crates
- Delivery time: 45 working days per 20 tons regular castings & forgings
- Service: OEM, ODM or Customized
- 20-year Foundry Operation Experience.
- Friendly & High Efficient Technical & Commercial Communication.
- Professional Export Practices: Exported to +60 Overseas Countries.
