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Super Alloy Incoloy Alloy 25-6MO Steel Bar SGS / BV / ABS / LR / TUV / DNV / BIS / API / PED
High Performance Alloys stocks and produces this grade in the following forms: Bar, billet, sheet fasteners and forgings.Request quote on this grade in sheets 0.062, 0.074 and 0.125" thick.
Overview
INCOLOY alloy 25-6HN is a 6% molybdenum super-austenitic stainless steel. It offers an excellent combination of strength, ductility and resistance to corrosion by a variety of media at an economical price. It is readily formed and welded. The properties of the alloy are enhanced by its content of nitrogen. Its high content of nickel results in thermal stability and resistance to stress corrosion cracking. Designated as UNS N08367, alloy 25-6HN directly competes with Allegheny Ludlum alloy AL6XN®. The alloys are covered by the same ASTM, ASME, and NACE specifications. Applications are found in the air pollution control, power, chemical processing, marine, pulp and paper, and oil and gas industries. Alloy 25-6HN is a new addition to Special Metals existing line of high performance, super-austenitic stainless steels, INCOLOY alloys 25-6MO and 27-7MO.
Characteristics
Applications
Chemistry
Chemical Requirements | ||||||||
|---|---|---|---|---|---|---|---|---|
| Ni | C | Mn | Cr | N | Si | Mo | Fe |
Max | 25.5 | .03 | 2.0 | 22.0 | 0.25 | 1.0 | 7.0 | Bal |
Min | 23.5 |
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| 20.0 | 0.18 |
| 6.0 |
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Tensile Data
Mechanical Property Requirements | |||||
|---|---|---|---|---|---|
| Ultimate Tensile | Yield Strength (0.2% OS) | Elong. in 2 in. or 50mm or 4D, min., % | R/A | Hardness |
Annealed | |||||
Typical | 107 KSi | 55 KSi | 48 |
| Rb 90 |
D- Forging quality is furnished to chemical requirements and
surface inspection only. No mechanical properties required.
Specifications
Form | Standard |
|---|---|
Metal Type | UNS N08367 |
Bar | ASTM B691 / ASME SB691 |
Wire | ASTM B691 / ASME SB691 |
Sheet | ASTM B688, A240 / ASME SB688 SA240 |
Plate | ASTM B688, A240 / ASME SB688 SA240 |
Tube | ASTM B676 WELDED |
Pipe | ASTM B675 WELDED |
Fitting | ASTM B366 / ASME SB366 / ASTM B462 / ASME SB462 |
Forging | ASTM B472 / ASTM B462 / ASME SB462 |
Weld Wire | 622, 686 or 625 |
Weld Electrode | Inconel 112, 122 or INCOWELD 686CPT |
Din |
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Machining
Machinability Ratings
| MACHINING DATA | |
|---|---|
| Carbide tools are suggested for rates better than 50% of Type 304. | |
| Machining Type | Suggested starting rates are: |
| Single Point turning : | Roughing - 0.15" depth, 0.018"/rev feed -200 SFM Finishing - 0.025" depth, 0.007"/rev feed - 350 SFM |
| Drilling : | 1/4" Dia hole - 0.004"/rev feed - 60 SFM 1/2" Dia hole - 0.007"/rev feed - 60 SFM 3/4" Dia hole - 0.010"/rev feed - 60 SFM |
| Reaming : | Feed - same as drilling - 100 SFM |
| Side and Slot Milling : | Roughing - 0.25" depth - 0.007"/tooth feed - 125SFM Finishing - 0.050" depth - 0.009"/tooth feed - 140SFM |
| These rates are for carbide tools, Type C-2 for roughing, drilling and reaming. Type C-3 for finishing. | |
