Alloy 20 Ring
Specifications
| Property | Details |
|---|---|
| Product Form | Seamless Rolled Ring (Forged) |
| Material Type | Austenitic Ni-Fe-Cr Corrosion-Resistant Alloy (Niobium-Stabilized) |
| UNS Designation | N08020 |
| W.Nr (DIN) | 2.4660 |
| Trade Names | Alloy 20, Incoloy 020, Carpenter 20, 20Cb-3, NiCr20CuMo |
| ASTM Standards | B366, B462, B463, B464, B468, B472, B473, B474, B729, B751 |
| ASME Standards | SB-366, SB-462, SB-463, SB-464, SB-468, SB-473, SB-474, SB-729, SB-751 |
| Ring / Forging Standard | ASTM B462 (Forgings, Flanges, Fittings) | ASTM B473 (Bar) |
| Flanging Standards | ASME B16.5, ASME B16.47, MSS SP44 |
| Pressure Classes | Class 150 / 300 / 400 / 600 / 900 / 1500 / 2500 |
| NACE Approval | MR0175 | ISO 15156 | NACE MR0103 |
| Hot Forming Temperature | 1,400 – 2,150 °F (760 – 1,175 °C) |
| Annealing Temperature | 1,800 – 1,850 °F (982 – 1,010 °C), then water quench or rapid air cool |
Chemical Composition
Ni
32.00–38.00%
Nickel
Fe
Balance
Iron
Cr
19.00–21.00%
Chromium
Cu
3.00–4.00%
Copper
Mo
2.00–3.00%
Molybdenum
Nb+Ta
8 × C – 1.00%
Niobium + Tantalum
Mn
2.00% Max
Manganese
Si
1.00% Max
Silicon
C
0.07% Max
Carbon
P
0.045% Max
Phosphorous
S
0.035% Max
Sulphur
Equivalent Grades
UNS
N08020
Alloy 20 / 20Cb-3
WNR
2.4660
Incoloy 020 / NiCr20CuMo
DIN
NiCr20CuMo
German Standard
Mechanical Properties
80 HRB (Typical)
Hardness
620 MPa (90 ksi) Min
Ultimate Tensile Strength (UTS)
310 MPa (45 ksi) Min
0.2% Yield Strength
40% Min
Elongation
Weight Chart
| Class | OD (mm) | ID (mm) | Height (mm) | Approx. Weight (kg) |
|---|---|---|---|---|
| Small (Class A) | 300 | 200 | 100 | ~32 |
| Medium (Class B) | 600 | 450 | 150 | ~96 |
| Large (Class C) | 1,000 | 750 | 200 | ~303 |
| Heavy (Class D) | 1,500 | 1,200 | 300 | ~620 |
| Max-Size (Class E) | 2,000 | 1,600 | 400 | ~1,466 |
Size Range
| Dimension | Min | Max | Unit |
|---|---|---|---|
| Outer Diameter (OD) | 200 | 2,000 | mm (~8" to ~80") |
| Ring Height | 50 | 1,200 | mm |
| Wall Thickness | 25 | Custom | mm |
| Weight per Ring | 10 | 15,000 | kg |
| Weight Formula (approx.) | W (kg) = 0.00000636 × (OD² − ID²) × H (mm) — based on density 8.1 g/cm³ | ||
Recent Export Deliveries
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304 SS Round Bars, 50mm OD, ASTM A276
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Availability of Duplex & Super Duplex Rings
| Duplex UNS S32205 Ring | ASTM A790 UNS S31803 Ring |
| Super Duplex S32750 Ring | Super Duplex S32760 Ring |
Latest Prices of Rings
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