ASTM B564 N08020 Nickel Alloy Steel Flange for High Temperature Application
ASTM B564 N08020 Nickel Alloy Steel Flange for High Temperature
ASTM B564 is a standard specification from the American Society for Testing and Materials (ASTM) for nickel alloy forgings, specifying requirements for chemical composition, mechanical properties, and heat treatment. ASTM B564 N08020 flanges refer to forged flanges manufactured from the classic stabilized nickel-iron-chromium alloy Alloy 20Cb3.
The core value of ASTM B564 N08010 nickel-based alloy flanges lies in their superior corrosion resistance, thanks to the addition of copper. The higher nickel content also gives them greater resistance to chloride stress corrosion cracking than standard austenitic stainless steel. Chromium provides resistance to oxidizing acids, while molybdenum and copper enhance resistance to reducing media, making them perform well in phosphoric acid, mixed acids, and halide-containing media. The addition of niobium reduces the risk of intergranular corrosion.
ASTM B564 N08020 Nickel Alloy Steel Flange Chemical Composition
| UNS GRA. | ASTM B564 N10276 Flange CHEMICAL COMPOSITION % MAXIMUM | ||||||
|---|---|---|---|---|---|---|---|
| MN | Nb | Cu | CR | NI | MO | FE | |
| N08020 | 2.0 | 1.0 | 3.0-4.0 | 19.0-21.0 | 32.0-38.0 | 2.0-3.0 | 33.0-45.0 |
ASTM B564 N08020 Alloy Steel Flange Mechanical Property Requirements
|
UNS GRA. |
Tensile Strength,
min, ksi [MPa]
|
Yield Strength,
0.2 % Offset, min,
ksi (MPa)
|
Elongation in
2 in. or 50 mm or 4D,
min, %
|
|---|---|---|---|
| N08020 | 80[550] |
35[240]
|
30
|
ASTM B564 N08020 Nickel Alloy Steel Flange Required Nondestructive Testing
When specified by the purchaser, each lot shall be inspected piece by piece. The purchaser shall specify whether one or both tests are required:
- Ultrasonic Testing: This shall be conducted in accordance with MIL-STD-271 (as modified from ASME SB564).
- Liquid Penetrant Testing: This shall be conducted in accordance with MIL-STD-271.
ASTM B564 N08020 Nickel Alloy Steel Flange Main Application
-
Sulfuric acid industry: storage tanks, heat exchangers, pipelines, pumps, and valves (especially in medium- and high-temperature sulfuric acid environments).
-
Chemical and petrochemical industries: equipment for producing organic acids such as phosphoric acid, acetic acid, and oxalic acid; alkylation units; mixed acid environments.
-
Food and pharmaceutical industries: equipment for processing highly corrosive foods (such as citric acid) and synthesizing pharmaceuticals.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.