High Precision Nickel Alloy Steel UNS N0669 Blind Flanges For Construction
GENERAL CHARACTERISTICS OF Alloy 690
Alloy 690 is a high-chromium-nickel alloy with excellent resistance to many corrosive aqueous media and high-temperature atmospheres. It has
high strength and good fabrication characteristics. The high chromium content imparts a resistance to oxidizing chemicals and high-temperature
oxidizing gases. The high nickel gives resistance to stress corrosion cracking in chloride-containing environments and to sodium hydroxide
solutions.
| Production Name | Nickel Alloy Weldoflange |
| Standard | ASME/ANSI B16.9, ISO, JIS, DIN, BS,GB, SH, HG,QOST,ETC. |
| Size | 1/2’’~48’’(Seamless);16’’~72’’(Welded) |
| Wall thickness | Sch5~Sch160XXS |
| Manufacturing process | Push, Press, Forge, Cast, etc. |
| Package | Wooden cases, pallets, nylon bags or according to the customers' requirements |
| Delivery time | 10-100 days depending on quantity |
| Payment terms | T/T or Western Union or LC |
| Shipment | FOB Tianjin/Shanghai, CFR, CIF, etc |
| Application | Petroleum/Power/Chemical/Construction/Gas/Metallurgy/Shipbuilding etc |
| Remarks | Other materials and drawings are available. |
| The third party inspection: | BV,SGS,LOIYD,TUV,and other party alloyed by clients. |
Chemical Properties
| CHEMICAL ANALYSIS |
| C | Carbon 0.05 max |
| Mn | Manganese 0.50 max |
| S | Sulfur 0.015 max |
| Fe | Iron 0.50 max |
| Si | Silicon 0.50 max |
| Ni(+Co) | Nickel Colbalt 0.80 – 1.10 |
| Cr | Chromium 27.0/31.0 |
| Cu | Copper 27.0/31.0 |
Application
The alloy finds applications involving processing of nitric acid and nitric/hydrofluoric acid solutions. As such it is used in tail-gas reheaters in nitric acid production and in heating coils and tanks for nitric/hydrofluoric acid solutions used to pickle stainless steels, and for the reprocessing of nuclear fuels.
The alloy’s resistance to sulfur-containing gases makes it suitable for use in coal gasification units, burners and ducts for processing sulfuric acid.
The alloy is further used for steam generator tubes, baffles and tube sheets as well as for hardware in nuclear power generation.
WELDABILITY
The alloy shows excellent weldability, and may be joined to other dissimilar metals and alloys using the appropriate filler metals. For extreme corrosive conditions, advice should be taken regarding the appropriate filler metal to be used.
Our advangtage
1) Raw material use 100% material steel
2) Good service
3) Competive price
4) Fast delivery
5)High quality products
Packaging & Shipping
| Packaging: | In wooded cases , pallets or according to clients' requirements |
| Shipping: | Tianjin port, Shanghai port and the other main ports in China |
