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Alloy 625 is known for superior corrosion resistance in Marine Applications compared to the Alloy 825. Check Difference Between Inconel and Incoloy which is important to know before installation in Sea water and High Temperature Applications. Aesteiron Steels LLP is one of the Oldest Stockist and Distributor of Nickel Alloys in Mumbai, India. Their technical team has analyzed the buyers requirements since 2007. Based on the experience of Aesteiron's Team here you will find the most common Alloy 825 vs Alloy 625 queries from Saudi Arabia, USA, UK, China and Canada buyers.
| Alloy 825 | Alloy 625 | |
|---|---|---|
| Material | nickel-iron-chromium alloy 825 | nickel-chromium alloy 625 |
| Equivalent | W.Nr. 2.4858 UNS N08825 |
W.Nr. 2.4856 UNS N06625 |
| Density | 0.294 lb/cu in | 0.305 lb/cu in |
| Melting Range | 1370-1400°C | 1290-1350°C |
| Curie Temperature | <-196°C | -196°C |
| Thermal Conductivity | 76.8 Btu • in/ft2•h•°F 11.1 W/m •°C. |
68 Btu • in/ft2•h•°F 9.8 W/m •°C. |
| Source: Special Metals, USA | ||
| Incoloy 825 | Inconel 600 | Inconel 625 | Inconel 718 | Inconel 601 | Inconel X750 | Inconel 617 | Inconel 690 | |
|---|---|---|---|---|---|---|---|---|
| C | ≤0.05 | ≤0.15 | ≤0.08 | ≤0.08 | ≤0.1 | ≤0.08 | 0.05-0.15 | ≤0.05 |
| Mn | ≤1 | ≤1 | ≤0.35 | ≤0.35 | ≤1.5 | ≤1 | ≤0.5 | ≤0.5 |
| Fe | ≥22 | 6-10 | rest | rest | rest | 5-9 | ≤3 | 7-11 |
| P | - | ≤0.015 | - | - | ≤0.02 | - | ≤0.015 | - |
| S | ≤0.03 | ≤0.015 | ≤0.015 | ≤0.01 | ≤0.015 | ≤0.01 | ≤0.015 | ≤0.015 |
| Si | ≤0.5 | ≤0.5 | ≤0.35 | ≤0.35 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 |
| Cu | 1.5-3 | ≤0.5 | ≤0.3 | ≤0.3 | ≤1 | ≤0.5 | - | ≤0.5 |
| Ni | 38-46 | ≥72 | 50-55 | 50-55 | 58-63 | ≥70 | ≥44.5 | ≥58 |
| Co | - | - | ≤10 | ≤1 | - | ≤1 | 10-15 | - |
| Al | ≤0.2 | - | ≤0.8 | 0.2-0.8 | 1-1.7 | 0.4-1 | 0.8-1.5 | - |
| Ti | 0.6-1.2 | - | ≤1.15 | - | - | 2.25-2.75 | ≤0.6 | - |
| Cr | 19.5-23.5 | 14-17 | 17-21 | 17-21 | 21-25 | 14-17 | 20-24 | 27-31 |
| Nb+Ta | - | - | 4.75-5.5 | 4.75-5.5 | - | 0.7-1.2 | - | - |
| Mo | 2.5-3.5 | - | 2.8-3.3 | 2.8-3.3 | - | - | 8-10 | - |
| B | - | - | - | - | - | - | ≤0.006 | - |
Alloy 825 vs Alloy 625 Applications and Uses
| Inconel Alloy 625 |
|
| Incoloy Alloy 825 |
|
Charpy Impact Strength of Inconel 625 vs 825 Plates According to Special Metals (USA)
Inconel Alloy 625
| Temperature | Orientation | Inconel Impact Strength | |
|---|---|---|---|
| J | ft-lb | ||
| 29°C | Longitudinal | 65, 66, 68 | 48, 49, 50 |
| Transverse | 62, 66, 70 | 46, 49, 51.5 | |
| -79°C | Longitudinal | 53, 57, 60 | 39, 44, 49 |
| Transverse | 53, 57, 60 | 39, 42, 44 | |
| -196°C | Longitudinal | 47, 47, 48 | 35, 35, 35.5 |
| Transverse | 42, 43, 49 | 31, 32, 36 | |
Incoloy Alloy 825
| Temperature | Orientation | Incoloy Impact Strength | |
|---|---|---|---|
| J | ft-lb | ||
| Room | Longitudinal | 107 | 79.0 |
| Transverse | 113 | 83.0 | |
| -43 °C | Longitudinal | 106 | 78.0 |
| Transverse | 106 | 78.5 | |
| -196 °C | Longitudinal | 91 | 67.0 |
| Transverse | 97 | 71.5 | |
| -253 °C | Longitudinal | 92 | 68.0 |
| Transverse | 92 | 68.0 | |
Comparison of Inconel 625 and 825 Nickel Content with Equivalent Grades
| Grade | UNS | Density in Lb./In3 | Nickel Content and Chemical Composition, % |
|---|---|---|---|
| Alloy 600 | N06600 | 0.304 | Nickel 76.0, Cr 15.0, Fe 8.0 |
| Alloy 601 | N06601 | 0.291 | Nickel 60.5, Cr 23.0, Fe 14.4, Al 1.4 |
| Alloy 601GC | N06601 | 0.302 | Nickel 60.5, Cr 23.0, Fe 14.4, Al 1.4 |
| Alloy 617 | N06022 | 0.311 | Nickel 52.0, Cr 22.0, Co 12.5, Mo 9.0, Fe 1.5, Al 1.2 |
| Alloy 622 | N06625 | 0.305 | Nickel 59.0, Cr 20.5, Mo 14.2, W 3.2, Fe 2.3 |
| Alloy 625LCF | N06626 | 0.315 | Nickel 58.0, Cr 20.5, Mo 16.3, W 3.8, Fe 1.0 |
| Alloy 690 | N06690 | 0.296 | Nickel 61.5, Cr 29.0, Fe 9.0 |
| Alloy 718 | N07718 | 0.296 | Nickel 54.0, Fe 18.5, Cr 18.0, Nb 5.0, Mo 3.0 |
| Alloy 718 SPF | N07719 | 0.296 | Nickel 54.0, Fe 18.5, Cr 18.0, Nb 5.0, Mo 3.0 |
| Alloy 725 | N07750 | 0.299 | Nickel 57.0, Cr 21.0, Mo 8.0, Fe 7.5, Nb 3.5, Ti 1.5 |
| Alloy X-750 | N07750 | 0.299 | Nickel 73.0, Cr 15.5, Fe 7.0, Ti 2.5, Nb 1.0, Al 0.7 |
| Alloy 800 | N08800 | 0.290 | Fe 46.0, Nickel 32.5, Cr 21.0, C 0.05 |
| Alloy 800H | N08810 | 0.294 | Fe 46.0, Nickel 32.5, Cr 21.0, Al + Ti 0.85 – 1.2, C 0.08 |
| Alloy 825 | N08825 | 0.294 | Nickel 44.0, Fe 28.0, Cr 21.5, Mo 3.0, Cu 2.0, Ti 1.0 |
| Alloy 925 | N09925 | 0.292 | Nickel 44.0, Fe 28.0, Cr 21.0, Mo 3.0, Ti 2.1, Cu 1.8, Al 0.3, C 0.01 |
Tensile and Yield Strength Difference Between Inconel 625 and 825
| Alloy 825 (Ksi (MPa)) |
Alloy 625 (Ksi (MPa)) |
|
|---|---|---|
| Annealed Tubing | 112 (772) | 120-140 (827-965) |
| Annealed Bar | 100 (690) | 120-150 (827-1034) |
| Annealed Plate | 96 (662) | 120-150 (827-1034) |
| Annealed Sheet | 110 (758) | 120-150 (827-1034) |
Incoloy 825 vs Inconel 625 Specification
| Incoloy 825 | Inconel 625 | Inconel 625LCF | |
|---|---|---|---|
| Products & Form | Pipe, tubing, sheet, plate, strip, round bar, flat bar, hexagon bars, forging stock and wire | Pipe, tubing, sheet, plate, strip, round bars, hexagon bar, flat bar, forging stock, extruded section and wire | Sheet and Strip |
| Werkstoff Nr. | 2.4858 | 2.4856 | 2.4856 |
| UNS | UNS N08825 | UNS N06625 | UNS N06625, N06626 |
| ASTM | ASTM B163, B423, B425, B366, B564, B751, B775, B829, B704, B705 | ASTM B443, B444, B564, B366, B446, B829, B704, B705, B751, B775 | ASTM B443 |
| ASME | SB 163, SB 366, SB 829, SB 423, SB 425, SB 564, SB 705, SB 704, SB 751, SB 775 | SB 446, SB 564, SB 366, SB 829 SB 443, SB 444, SB 704, SB 705, SB 775, SB 751, | SB 443 |
| AMS | - | AMS 5581, 5666, 5599, 5837, 5869 | AMS 5879 |
| BS British Standards | BS 3072 - BS 3074, BS 3076 (NA16) | BS 3072, 3074, 3076 (NA21) | BS 3072 (NA21) |
| DIN Standards | DIN 17744, DIN 17750 - 17754 | DIN 17744, DIN 17750 - 17754 | - |
| NACE | NACE MR-0175, VdTÜV 432, ISO 15156 | NACE MR-0175, VdTÜV 499, ISO 15156, EN 10095 | - |
| ISO Standards | ISO 6207, ISO 6208, 9723 - 9725 | ISO NW6625, ISO 6207, ISO 6208, 9723 - 9725, 4955A | - |
Inconel 625 vs 825 PREN
| Material | PREN |
|---|---|
| Alloy 825 | 30 |
| Alloy 625 | 46.4 - 56.0 |
Electrodes and bare filler wires for Inconel and Incoloy
| Welding Electrode | |
|---|---|
| INCONEL 600 and 601 | INCONEL Welding Electrode 182, ENiCrFe-3, 8N12 |
| INCONEL 625 and 601 | INCONEL Welding Electrode 112, ENiCrMo-3, 1N12 |
| INCONEL 617; INCOLOY 800HT | INCONEL Welding Electrode 117, ENiCrCoMo-1 |
| INCOLOY alloys 800 and 800HT | INCO-WELD A Electrode, ENiCrFe-2 |
| Filler Metal | |
| INCONEL 600/ 601, INCOLOY 800/ 800HT | INCONEL Filler Metal 82, ERNiCr-3, RN82, EN82 |
| INCONEL 601 | INCONEL Filler Metal 601, ERNiCrFe-11 |
| INCONEL 617, INCOLOY 800HT | INCONEL Filler Metal 617, ERNiCrCoMo-1 |
| INCONEL 625, 601 | INCONEL Filler Metal 625, ERNiCrMo-3, RN625, EN625 |
| INCONEL 718, X-750 | INCONEL Filler Metal 718, ERNiFeCr-2 |
Inconel and Incoloy Corrosion Resistance Cracking
Corrosion-Resistance Cracking Guide for chlorides or H2S Service
Corrosion Rates of Inconel and Incoloy in Molten Caustic Soda
Creep Rupture Strength of Inconel and Incoloy
ASTM Standard of Inconel and Incoloy Pipes
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