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HomeMy WebLinkAboutType 625 Nickel Alloy Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 1 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ ATI 625™ Nickel-Base Superalloy (UNS N06625) INT RODUCT ION ATI 625™ alloy (UNS Designation N06625) is an austenitic nickel-base superalloy possessing excellent resistance to oxidation and corrosion over a broad range of corrosive conditions, including jet engine environments and in many other aerospace and chemical process applications. The alloy has outstanding strength and toughness at temperatures ranging from cryogenic temperature to 2000°F (1093°C). ATI 625™ alloy also has exceptional fatigue resistance. ATI 625™ alloy derives its strength from the solid solution strengthening effects of molybdenum and columbium on the nickel-chromium matrix. These elements also contribute to the alloy’s outstanding corrosion resistance. Although the alloy was developed for high temperature strength, its highly alloyed composition provides a high level of general corrosion resistance to a wide range of oxidizing and non- oxidizing environments. The levels of chromium and molybdenum provide excellent resistance to chloride ion pitting and the high level of nickel provides resistance to chloride stress corrosion cracking. The material possesses a high degree of formability and shows better weldability than many highly alloyed nickel-base alloys. The alloy is resistant to intergranular corrosion even in the welded condition. ATI 625™ alloy can be produced by vacuum induction melting or AOD refining. Consumable electrode remelting procedures may be used to further refine the material. FORMS AND CONDITIONS AVAILABLE ATI 625™ alloy is available in plate, sheet and strip and long product forms. The alloy is supplied in the annealed conditions generally specified. SPECIFICATIONS ATI 625™ alloy is covered by the following specifications: Product Form AMS ASTM ASME Castings 5401 Castings 5402 Seamless or Welded Tubing 5581 Sheet, Strip and Plate 5599 B443 SB-443 Bar, Forgings and Rings 5666 Welding Wire 5837 Seamless Tube and Pipe B444 SB-444 Rod and Bar B446 SB-446 Welded Tube B704 SB-704 Welded Pipe B705 SB-705 Fittings B366 SB-366 Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 2 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ TYPICAL ANALYSIS Element Percent Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Molybdenum Columbium plus Tantalum Titanium Aluminum Iron 0.05 0.30 0.010 0.003 0.25 22.0 Balance 9.0 3.5 0.3 0.3 4.0 CORROSION AND OXIDATION RESISTANCE The high level of chromium and molybdenum in the ATI 625™ alloy provides a high level of pitting and crevice corrosion resistance to chloride contaminated media, such as sea water, neutral salts and brines. Typical Data in Chloride Solutions Crevice Test in 10 Percent Ferric Chloride Type 316 ATI 625™ Onset Temperature °F (°C) for Attack in ASTM Procedure G-48 <32 (<0) 104-113 (40-45) Panel Exposures in Sea Water Panel Location Type 316 ATI 625™ Flowing Sea Water Tidal Zone Partial Mud Burial Crevice Attack 1 Month Crevice Attack 1 Month Crevice Attack 1 Month No Attack 18 Months No Attack 18 Months No Attack 18 Months The alloy is resistant to a variety of corrosive media from highly oxidizing to moderately reducing. Tests in geothermal brines indicate ATI 625™ alloy is highly resistant to hot geothermal fluids comparable to AL 29-4-2® stainless and Titanium Grade 2. Tests in simulated flue gas desulfurization environments show ATI 625™ alloy highly resistant to the environment in comparison to alloys such as Type 316 or Alloy G and comparable to AL 29-4-2 alloy and C-276 nickel alloy. The following data are illustrative. Typical corrosion rates are in mils per year (mm/a). Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 3 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ Boiling Organic Acid Solutions Alloy 45% Formic 10% Oxalic 88% Formic 99% Acetic ATI 625™ 5.0 (0.13) 6.0 (0.15) 9.0 (0.23) 0.4 (0.01) Type 316 11 (0.28) 40 (1.02) 9.0 (0.23) 2.0 (0.05) Dilute Reducing Acids - Boiling Solutions* Alloy 1% Sulfuric 5% Sulfuric 10% Sulfuric 1 % Hydrochloric ATI 625™ 2.2 (0.06) 8.9 (0.23) 25.3 (0.64) 36.3 (0.92) AL 29-4-2® 2.6 (0.07) 10.7 (0.27) 18.2 (0.46) 0.1 (<0.01) Type 316 25.8 (0.65) 107 (2.72) 636 (16.2) 226 (5.74) * Sulfuric acid test samples activated before tests and hydrochloric acid test samples tested without activation. Miscellaneous Environments Environment ATI 625™ AL 29-4-2® Type 316 20% Phosphoric Acid 0.36 (<0.01) 0.12 (<0.01) 0.2 (<0.01) 10% Sulfamic Acid 4.80 (0.12) 0.11 (<0.01) 63.6 (1.61) 10% Sodium Bisulfate 3.96 (0.10) 0.12 (<0.01) 41.6 (1.06) Chloride Stress Corrosion Cracking Resistance Test ATI 625™ Type 316 ATI 20™ 42% Magnesium Chloride No Cracks 1000 Hours Cracks <24 Hours Cracks <100 Hours 26% Sodium Chloride No Cracks 1000 Hours Cracks 600 Cracks No Cracks 1000 Cracks Oxidation Resistance ATI 625™ alloy has excellent oxidation and scaling resistance at temperatures up to 2000°F (1093°C). It is superior to many other high temperature alloys under cyclic heating and cooling conditions. The following graph compares the weight loss of several stainless steel alloys to ATI 625™ alloy under cyclic oxidation at 1800°F (982°C). Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 4 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ PHYSICAL PROPERTIES Physical Constants ATI 625™ Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 5 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ Electrical Resistivity Temperature Electrical Resistivity microhm–cm °F °C 70 100 200 400 600 800 1000 1200 1400 1600 1800 2000 21 38 93 204 316 427 538 649 760 871 982 1093 128.9 129.6 131.9 133.9 134.9 135.9 137.9 137.9 136.9 135.9 134.9 133.9 Thermal Properties Temperature Linear Coefficient of Thermal Expansion (a) (Units of 10-6) Thermal Conductivity (b)(c) °F °C /°F /°C Btu- ft/ft2 W/m•K -250 -200 -100 0 70 100 200 400 600 800 1000 1200 1400 1600 1700 1800 -157 -129 -73 -18 21 38 93 204 316 427 538 649 760 871 927 982 – – – – – – 7.1 7.3 7.4 7.6 7.8 8.2 8.5 8.8 9.0 – – – – – – – 12.8 13.1 13.3 13.7 14.0 14.8 15.3 15.8 16.2 – 4.2 4.3 4.8 5.3 5.7 5.8 6.3 7.3 8.2 9.1 10.1 11.0 12.0 13.2 – 14.6 7.3 7.4 8.3 9.2 9.9 10.0 10.7 12.6 14.2 15.7 17.5 19.0 20.8 22.8 – 25.3 (a) Average coefficient from 70 F (21°C) to temperature shown. (b) Measurements made at Battelle Memorial Institute. (c) Material annealed 2100°F (1149°C). Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 6 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ Modulus Data Temperature Modulus of Rigidity (G) Elastic Modulus (E) Poisson’s Ratio (a) (µ) °F °C Units of 106 psi Units GPa Units of 106 psi Units GPa 70 200 400 600 800 1000 1200 1400 1600 21 93 204 316 427 538 649 760 871 11.4 11.2 10.8 10.5 10.1 9.7 9.2 8.7 8.2 79 77 75 72 70 67 63 60 57 29.8 29.2 28.4 27.5 26.6 25.6 24.4 23.1 – 205 200 195 190 185 175 170 160 – 0.308 0.310 0.312 0.313 0.312 0.321 0.328 0.329 – MECHANICAL PROPERTIES Typical Short Time Tensile Properties as a Function of Temperature Typical room temperature tensile properties of material annealed at 1920°F (1065°C) follow. Yield Strength (0.2% Offset) Ultimate Tensile Strength Elongation (% in 2") 63,000 psi (430 MPa) 136,000 psi (940 MPa) 51.5 The typical room temperature tensile properties of material solution annealed at 2150°F (1177°C) follow. Yield Strength (0.2% Offset) Ultimate Tensile Strength Elongation (% in 2") 49,500 psi (340 MPa) 115,500 psi (800 MPa) 67 The short time elevated temperature tensile properties of the ATI 625™ alloy annealed at 1950°F (1066°C) are shown in the following graph. Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 7 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ Creep and Stress Rupture Properties Typical creep and rupture strengths of solution annealed (refer to the section on heat treatment) ATI 625™ alloy follow. Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 8 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ Impact Resistance The ATI 625™ alloy maintains high impact resistance at low temperature as shown below. Typical Altemp® 625 Alloy Impact Properties Test Temp. Orientation Impact Energy (a) °F °C Ft-lbs Joules 85 85 -110 -110 -320 -320 30 30 - 79 - 79 -196 -196 Longitudinal Transverse Longitudinal Transverse Longitudinal Transverse 49 49 44 41.5 35 35 66 66 60 56 47 47 (a) Charpy Keyhole Specimens (Mean Value of 3 Tests) Impact properties may be expected to decrease with extended service in 1200 to 1600°F (649 to 871°C) range. FATIGUE RESISTANCE The room temperature endurance limit for cold rolled sheet, mill annealed (1950°F, 1066°C) and tested in completely reverse bending (constant deflection) was found to be 46,000 psi (315 MPa) or about 35 percent of tensile strength. The constant load rotating beam test provides a higher estimate of fatigue limit (approximately 65 percent of tensile strength). The latter may be influenced by the work hardening behavior of the ATI 625™ alloy. Typical room and elevated temperature fatigue properties (rotating beam test) for mill annealed bar and plate products are shown below. Formability The ATI 625™ alloy is capable of being formed like the standard austenitic stainless steels. The material is considerably stronger than conventional austenitic stainless steels and consequently requires higher loads to cause the material to deform. During cold working, the material work hardens more rapidly than austenitic stainless steels. The combination of high initial strength and work hardening rate may necessitate need for intermediate anneals if the cold deformation is extensive. Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 9 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ Effect of Cold Reduction on Properties of Plate Annealed at 2150°F (1177°C) Cold Reduction % Hardness Rockwell C Yield Strength (0.2% Offset) Tensile Strength Elongation, % Reduction of Area, % psi (MPa) psi (MPa) 0 5 10 15 20 30 40 50 60 70 88Rb 94Rb 25 32 34 36 39 40 44 45 49,500 77,500 102,500 112,500 125,000 152,000 167,000 177,000 180,500 201,000 341 534 707 776 862 1048 1151 1220 1245 1386 115,500 121,000 130,000 137,000 143,000 165,000 179,500 189,500 205,000 219,000 796 834 896 945 986 1137 1238 1307 1413 1510 67.0 58.0 47.5 39.0 31.5 17.0 12.5 8.5 6.5 5.0 60.4 58.1 54.6 51.9 50.0 49.3 41.9 38.0 32.7 25.4 Welding The ATI 625™ alloy can be readily welded by conventional processes used for austenitic stainless steel, including fusion and resistance methods. The material should be in the mill annealed condition and thoroughly descaled and cleaned before welding. Preheating is not required and postweld treatment is not needed to maintain or restore corrosion resistance. Typical short-time elevated temperature tensile properties of welds made on mill annealed material by the gas tungsten-arc (GTAW) process are shown below. Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2013 ATI. All rights reserved. VERSION 1 (2/19/2013): PAGE 10 of 10 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 625™ Heat Treatment ATI 625™ alloy is furnished with one heat treatment for optimum properties up to 1200°F (649°C) and another for optimum properties above 1200°F (649°C). The standard anneal at a minimum of 1600°F (871°C) is used for service temperatures up to 1200°F (649°C). When optimum high temperature creep and rupture properties are required, as for service above 1200°F (649°C), a solution anneal at 2000°F (1093°C) minimum is used. In the solution annealed condition, a subsequent stabilization anneal at 1800°F (982°C) minimum is sometimes specified to further increase resistance to sensitization.