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ASTM B564 UNS N10276 is a specification that covers nickel-molybdenum-chromium alloys, commonly known as Hastelloy C276. Flanges made from this alloy are designed to withstand extremely high temperatures and chemically corrosive environments. In fact, the 2.4819 alloy c276 is able to resist the formation of grain boundary precipitates that proves to increase intergranular corrosion resistance.
Hastelloy UNS N10276 Material Characteristics
Hastelloy UNS N10276 is a nickel-based alloy with significant additions of molybdenum, chromium, and tungsten. This composition imparts outstanding corrosion resistance, making Hastelloy c276 flanges suitable for applications involving corrosive media such as acids, chlorides, and other harsh chemicals. Its versatility and durability make UNS N10276 Pipe Flange a preferred choice in industries like chemical processing, petrochemical, and pollution control.
Types of ASTM B564 UNS N10276 Flanges
1. Welding Neck Flanges
2. Slip-On Flanges
3. Socket Weld Flanges
4. Lap Joint Flanges
5. Threaded Flanges
6. Blind Flange
Dimensions of ASME SB 564 UNS N10276 Pipe Flange
| Nominal Size | Outside Diameter | Min. Thickness | RF Dia. | No. of Bolt Holes | Diameter of Holes | Bolt Circle | SO Bore ID | WN Bore ID | Dia. Hub Base | Dia. Hub Top | SO LTH | WN LTH |
| (OD) | (T) | (R) | (BC) | (SB) | (WB) | (HB) | (HT) | (SL) | (WL) | |||
| 1⁄2 | 3.75 | 0.5 | 1.38 | 4 | 0.63 | 2.62 | 0.88 | 0.62 | 1.5 | 0.84 | 0.81 | 2 |
| 3⁄4 | 4.62 | 0.56 | 1.69 | 4 | 0.75 | 3.25 | 1.09 | 0.82 | 1.88 | 1.05 | 0.94 | 2.19 |
| 1 | 4.88 | 0.62 | 2 | 4 | 0.75 | 3.5 | 1.36 | 1.05 | 2.12 | 1.32 | 1 | 2.38 |
| 11⁄4 | 5.25 | 0.69 | 2.5 | 4 | 0.75 | 3.88 | 1.7 | 1.38 | 2.5 | 1.66 | 1 | 2.5 |
| 11⁄2 | 6.12 | 0.75 | 2.88 | 4 | 0.88 | 4.5 | 1.95 | 1.61 | 2.75 | 1.9 | 1.13 | 2.63 |
| 2 | 6.5 | 0.81 | 3.62 | 8 | 0.75 | 5 | 2.44 | 2.07 | 3.31 | 2.38 | 1.25 | 2.69 |
| 21⁄2 | 7.5 | 0.94 | 4.12 | 8 | 0.88 | 5.88 | 2.94 | 2.47 | 3.94 | 2.88 | 1.44 | 2.94 |
| 3 | 8.25 | 1.06 | 5 | 8 | 0.88 | 6.62 | 3.57 | 3.07 | 4.62 | 3.5 | 1.63 | 3.06 |
| 31⁄2 | 9 | 1.12 | 5.5 | 8 | 0.88 | 7.25 | 4.07 | 3.55 | 5.25 | 4 | 1.69 | 3.13 |
| 4 | 10 | 1.19 | 6.19 | 8 | 0.88 | 7.88 | 4.57 | 4.03 | 5.75 | 4.5 | 1.82 | 3.32 |
| 5 | 11 | 1.31 | 7.31 | 8 | 0.88 | 9.25 | 5.66 | 5.05 | 7 | 5.56 | 1.94 | 3.82 |
| 6 | 12.5 | 1.38 | 8.5 | 12 | 0.88 | 10.62 | 6.72 | 6.07 | 8.12 | 6.63 | 2 | 3.82 |
| 8 | 15 | 1.56 | 10.62 | 12 | 1 | 13 | 8.72 | 7.98 | 10.25 | 8.63 | 2.38 | 4.32 |
| 10 | 17.5 | 1.81 | 12.75 | 16 | 1.12 | 15.25 | 10.88 | 10.02 | 12.62 | 10.75 | 2.56 | 4.56 |
| 12 | 20.5 | 1.94 | 15 | 16 | 1.25 | 17.75 | 12.88 | 12 | 14.75 | 12.75 | 2.82 | 5.06 |
| 14 | 23 | 2.06 | 16.25 | 20 | 1.25 | 20.25 | 14.14 | 13.25 | 16.75 | 14 | 2.94 | 5.56 |
| 16 | 25.5 | 2.19 | 18.5 | 20 | 1.38 | 22.5 | 16.16 | 15.25 | 19 | 16 | 3.19 | 5.69 |
| 18 | 28 | 2.31 | 21 | 24 | 1.38 | 24.75 | 18.18 | 17.25 | 21 | 18 | 3.44 | 6.19 |
| 20 | 30.5 | 2.44 | 23.12 | 24 | 1.38 | 27 | 20.2 | 19.25 | 23.12 | 20 | 3.69 | 6.32 |
| 22 | 33 | 2.57 | 25.25 | 24 | 1.63 | 29.25 | 22.22 | 21.25 | 25.25 | 22 | 3.93 | 6.43 |
| 24 | 36 | 2.69 | 27.62 | 24 | 1.63 | 32 | 24.25 | 23.25 | 27.62 | 24 | 4.13 | 6.56 |
Hastelloy C276 Flanges Standards and Pressure Class
| ASME/ANSI B 16.5 | Slip on Flange, Welding Neck Flange, High Hub Blind Flange, Blind Flange,Lap Joint Flange, Socket Weld Flange, Ring Type Joint Flange, Threaded Flange |
| Pressure Class | 150, 300, 400, 600, 900, 1500, 2500 |
| ASME/ANSI B 16.47 | Blind Flange [Series A & B], Welding Neck Flange |
| Pressure Class | 75, 150, 300, 400, 600, 900 |
| ASME/ANSI B 16.36 | Slip on Flange, Welding Neck Flange, Threaded Flange |
| Pressure Class | 300, 400, 600, 900, 1500, 2500 |
| BS 4504 SEC 3.1 | Hubbed Slip on Flange, Welding Neck Flange, Lapped Pipe End Flange, Hubbed Threaded Flange, Loose Plate Flange, Plate Flange, Blank Flange, Loose Plate With Weld Neck Flange |
| Pressure Class | PN 2.5 TO PN 40 |
| BS 4504[PART 1] | Welding Neck Flange, Plate Flange, Hubbed Slip-On Hubbed Threaded,Blank Flange, Loose Plate With Weld On Plate Collar |
| Pressure Class | PN 2.5 TO PN 400 |
| BS 1560 BOSS | Socket Welding Flange, Welding Neck Flange, Blind Flange, Slip-On Flange, Lapped Flange, Screwed Boss Flange |
| Pressure Class | 150, 300, 400, 600, 900, 1500, 2500 |
| BS10 | Plate Slip-On Flange, Welding Neck Flange, Slip-On Boss Flange, Screwed Boss Flange, Blind Flange |
| TABLE | D, E, F, H |
| DIN Flanges | DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673 |
| Pressure Class | PN 6 TO PN 100 |
N10276 Flanges Production and Manufacturing Process
The production of ASTM B564 N10276 flanges involves precision manufacturing processes, beginning with raw material inspection to ensure compliance with ASTM standards. Through forging, machining, and heat treatment, the alloy undergoes precise shaping and enhancement of metallurgical properties. Stringent quality control measures, including non-destructive testing (chemical analysis, tensile strength, hardness, impact toughness, and non-destructive testing such as ultrasonic testing, liquid penetrant testing, magnetic particle testing, and radiographic testing.), verify dimensional accuracy and mechanical properties.
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Frequently Asked Questions: ASTM B564 UNS N10276 Flanges
Q1: What is the difference between ASTM B564 and UNS N10276?
A: ASTM B564 is the standard material specification for nickel alloy forgings, covering the manufacturing process and testing requirements. UNS N10276 (commonly known as Hastelloy C276) is the specific chemical grade of the alloy. Essentially, ASTM B564 tells you how it's made, and UNS N10276 tells you what it is made of.
Q2: Why is UNS N10276 preferred for chemical processing?
A: UNS N10276 is highly valued due to its exceptional resistance to a wide range of aggressive media. It contains high levels of molybdenum, chromium, and tungsten, which protect the flanges against pitting, crevice corrosion, and oxidizing atmospheres up to 1900°F (1038°C).
Q3: What pressure ratings are available for Hastelloy C276 flanges?
A: As a leading supplier, we provide ASTM B564 UNS N10276 flanges in multiple pressure classes to meet international standards, including:
- ASME/ANSI: Class 150, 300, 600, 900, 1500, and 2500.
- DIN/EN: PN6, PN10, PN16, PN25, PN40, through PN160.
Q4: Does ASTM B564 UNS N10276 require post-weld heat treatment?
A: Generally, Hastelloy C276 flanges can be used in the as-welded condition for most chemical process applications. Its low carbon content minimizes grain-boundary carbide precipitation during welding, maintaining its corrosion resistance without the immediate need for post-weld annealing.
Q5: Can these flanges be used in sub-zero temperatures?
A: Yes. ASTM B564 UNS N10276 maintains excellent ductility and impact strength even at cryogenic temperatures. This makes it a versatile choice for both high-heat chemical reactors and extreme cold-storage environments.
Q6: How do I verify the quality of my ASTM B564 UNS N10276 order?
A: All our flanges come with a Mill Test Certificate (MTC) according to EN 10204 3.1. This document verifies the chemical analysis, mechanical properties, and compliance with the ASTM B564 specification.
ASTM B564 Alloy C276 Suppliers
Our company is a professional and reliable one-stop service manufacturer suppliers exports. We not only provide Hastelloy c276 round bar raw materials, but also provide alloy c276 pipe, tube, plate, sheet, pipe fitting, flange, fastener, and fabricated pipe spools service. Free samples can be provided. Contact us for a free quote.
