Name: ASTM B564 UNS N08020 Nickel Alloy Weld Neck Flange Forged Alloy 20 WNRF Flange
Brand: Yuhong Group Co.,Ltd
SKU: ASTM B564 UNS N08020 WNRF Flange
Price: 150000 USD
Availability: InStock

Yuhong Holding Group Co.,LTD

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ASTM B564 UNS N08020 Nickel Alloy Weld Neck Flange Forged Alloy 20 WNRF Flange

Product Details:

Place of Origin:	CHINA
Brand Name:	YUHONG
Certification:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:	ASTM B564 UNS N08020 WNRF Flange

Payment & Shipping Terms:

Minimum Order Quantity:	1PC
Packaging Details:	PLYWOOD CASE / PALLET
Delivery Time:	7 DAYS
Payment Terms:	L/C,T/T

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Detailed Product Description

Product Name:	Nickel Alloy Flange	Dimension:	ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges Etc.
Standard:	ASTM B564, ASME SB564	Material:	UNS N08020, Alloy 20
Size:	1/2" To 48"	Pressure:	Class150/300/600/9001500/2500
Type:	Weld Neck Flange (WN)	Flange Face:	Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Application:	Oil And Gas Industry, Chemical Processing, Marine Engineering,etc
Highlight:	ASTM B564 Alloy 20 WNRF flange , ASME B16.5 weld neck flange , UNS N08020 alloy steel flange

ASTM B 564 UNS N08020 / Alloy 20 WNRF Flange Nickel Alloy Weld Neck Flange

The ASTM B564 UNS N08020 WNRF Flange is a premium, forged corrosion-fighter. While the WP9 elbow is your choice for extreme heat, the Alloy 20 WNRF flange is your definitive choice for extremely aggressive chemicals (particularly sulfuric acid) at moderate temperatures, offering the dual benefits of a forged stress-resistant hub (Weld Neck) and a robust sealing interface (Raised Face) for critical, hazardous fluid services.

When to Specify Alloy 20? Specify Alloy 20 when you need:

Proven resistance to sulfuric acid and phosphoric acid.
Good general corrosion resistance where 316L is failing.
Resistance to Chloride Stress Corrosion Cracking.
A cost-effective solution that avoids the high cost of more exotic alloys like Hastelloy.

Equivalent Material of ASTM B564 UNS N08020 Flange Alloy 20 Weld Neck Flange

STANDARD	UNS	WERKSTOFF NR.	AFNOR	EN	JIS	BS	GOST
Alloy 20	N08020	2.4660	Z2NCUD31-20AZ	NiCr20CuMo	-	-	-

Chemical Composition (%) of ASTM B564 UNS N08020 Flange Alloy 20 Weld Neck Flange

Alloy 20	Ni	C	Mo	Mn	Si	Fe	Cu	S	P	Cr
Alloy 20	32 - 38	0.02 max	2 - 3	1 - 2	0.7 max	Bal	3 - 4	0.005 max	0.02 max	19 - 21

Mechanical Characteristics of ASTM B564 UNS N08020 Flange Alloy 20 Weld Neck Flange

Density	Melting Point	Yield Strength (0.2%Offset)	Tensile Strength	Elongation
8.1 g/cm3	1443 °C (2430 °F)	Psi - 35000 , MPa - 241	Psi - 80000 , MPa - 551	30 %

ASTM B564 UNS N08020 Weld Neck Flange Nickel Alloy Flange

Specifications List	ASTM/ ASME B564 / SB564
Standard Flange	BS, DIN, ASME, ANSI, EN
Size Chart	1/2″up to 48″ (15 - 1200NB)
Class / Pressure Rating	PN16, 2500#, PN25, 600#, 150#, 300#, 900#, PN10, 1500#, PN64, PN6, PN40
Flange Type	Weld Neck, Blind, Slip on, Socket, Thread, Long Weld Neck ...
ASTM Standards	DIN, ANSI/ASME B16.48, B16.5, BS4504, BS 10, B 16.47 Series A & B, EN-1092

Key Features & Advantages

Superior Strength in Harsh Environments: The combination of the robust weld neck design and the high-strength Alloy 20 forging makes it capable of withstanding high pressures and temperatures in corrosive service.
Excellent Weldability: The "weld neck" is designed to be butt-welded directly to the pipe, creating a strong, reliable joint. Alloy 20 itself is readily weldable using compatible filler metals (e.g., ER320LR, ENi-6620).
Long Service Life: Its exceptional resistance to a wide range of corrosives minimizes maintenance, downtime, and replacement costs.
Smooth Flow Path: The tapered hub allows for a smooth transition from the pipe to the flange, reducing turbulence and pressure drop

Application

This flange is used in industries where standard stainless steels (304/316) fail due to corrosion.

Chemical Processing Industry (CPI): Reactors, tanks, and piping handling sulfuric acid, phosphoric acid, and other aggressive chemicals.
Pharmaceutical Industry: For processes involving high-purity and corrosive intermediates.
Food and Beverage Processing: Especially in applications with acidic ingredients and chlorinated cleaning agents.
Oil & Gas (Upstream & Midstream): Handling of sour gases (H₂S) and other corrosive wellstream components.
Pulp & Paper Industry: Digesters and bleaching equipment.
Plastic Manufacturing: Plants producing synthetic fibers and polymers.