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HomeMy WebLinkAboutType 201 Stainless Steel 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. © 2012 ATI. All rights reserved. VERSION 1 (3/9/2012): PAGE 1 of 9 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 201 HP™/ATI 201L HP™ ATI 201 HP™/ATI 201L HP™ Stainless Steel: Austenitic (UNS S20100 and S20103) GENERAL PROPERTIES ATI 201 HP™ and ATI 201L HP™ austenitic stainless steels belong to the 200 series of Cr-Mn-Ni stainless alloys, which are similar to the 300 series of Cr-Ni stainless alloys, but contain less nickel. Composition Range Per ASTM A240 Element ATI 201 HP™ ATI 201L HP™ Carbon 0.15 Max 0.03 Max. Manganese 5.50/7.50 5.50/7.50 Silicon 1.00 Max. 0.75 Max. Chromium 16.00/18.00 16.00/18.00 Nickel 3.50/5.50 3.50/5.50. Nitrogen 0.25 Max. 0.25 Max Iron Balance Balance Types ATI 201 HP™ and ATI 201L HP™ are comparable to chromium-nickel types 301, 304, 304L in many respects, but they can provide some advantages over the 18-8 grades in certain applications. Lower cost manganese and nitrogen additions are partial substitutes for nickel in types ATI 201 HP™ and ATI 201L HP™, making them more economical alloys. Because they possess a very desirable combination of economy plus good mechanical properties and corrosion resistance, they have been used in a wide variety of consumer and transportation applications, as illustrated in the following table. Typical Applications For Types ATI 201 HP™ and ATI 201L HP™ Formability Structural Strength Cookware Bodies/Lids Transit Car Structural Members Hose Clamps Transit Car Roofing/Siding Piston Rings Thermal Window Spacers Washing Machine Baskets Air Bag Containers Truck Trailer Posts and Door Frames ATI 201 HP™ and ATI 201L HP™ alloys are available in plate, sheet, and strip product forms and are listed in ASTM A240. ATI 201 HP™ alloy has properties similar to type 301, providing excellent mechanical properties in the annealed condition (i.e., strength and formability). Because of its high work hardening rate, it exhibits a high uniform elongation for improved stretchability for severe forming applications such as washing machine baskets. ATI 201L HP™ alloy is a low carbon version of ATI 201 HP™ and maintains satisfactory intergranular corrosion resistance in applications involving welding, particularly for heavier-gage material. 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. © 2012 ATI. All rights reserved. VERSION 1 (3/9/2012): PAGE 2 of 9 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 201 HP™/ATI 201L HP™ Balancing of alloying elements (austenitizers versus ferritizers) in types ATI 201 HP™ and ATI 201L HP™ produces an austenitic structure in the annealed condition even at sub-zero temperatures. This austenitic structure achieves significant strengthening through cold working of the material to produce partial transformation to a stronger martensitic structure. Thus types ATI 201 HP™ and ATI 201L HP™ can display a wide range of mechanical strengths starting from the annealed condition and increasing with increasing degrees of cold working to levels of strength which are necessary for several applications such as transit cars or truck trailer components. CORROSION RESISTANCE ATI 201 HP™ alloy is resistant to a wide variety of mild to moderately corrosive media. Generally speaking, type ATI 201 HP™ alloy has proven to be entirely adequate for many applications where type 301 has been satisfactory and has been successfully substituted for type 304 in a variety of mild environments. General Corrosion ATI 201 HP™ alloy and types 301, and 304 exhibit comparable corrosion behavior in an organic acid environment. Corrosion Resistance in Boiling Solution Corrosion Rate In Mils / Year (mm/y) Boiling Test Solution ATI 201 HP™ Type 301 Type 304 20% Acetic Acid 0.11 0.06 0.07 (.0028) (.0016) (.0018) * Annealed material tested as duplicate samples for five 48-hour test periods. The low carbon in type ATI 201 HP™ alloy contributes to its resistance to precipitation of chromium carbides, which increases its resistance to intergranular corrosion. Unlike the standard carbon grades, the low-carbon ATI 201L HP™ alloy and type 304L did not show increased corrosion rates or cracking in the sensitized condition when compared to an annealed version or as-welded version of that grade. Intergranular Corrosion Tests Tests Per ASTM A262 Corrosion Rate Mils Per Year (mm/y) ATI 201 HP™ ATI 201L HP™ Type 301 Type 304 Type 304L Practice B Boiling Ferric Sulfate-50% Sulfuric Acid Annealed As Welded* Sensitized** 56.6 (1.439) 59.1 (1.501) dissolved 68.2 (1.733) 66.5 (1.689) 70.5 (1.791) 31.7(0.805) 32.2 (0.813) 6105 (155.0) 20.8 (0.527) 22.4 (0.570) 1654 (42.0) 20.4 (0.518) 20.5 (0.521) 26.6 (0.675) Practice C 65% Nitric Acid, Boiling Annealed As Welded* Sensitized** 13.3 (0.337) 12.6 (0.321) 2379 (35.0) 23.9 (0.607) 23.3 (0.593) 38.7 (0.982) 13.1 (0.332) 13.8 (0.350) 1717 (28.4) 10.2 (0.259) 10.0 (0.253) 441 (11.20) 9.12 (0.232) 7.44 (0.189) 17.3 (0.439) Practice E Copper/16% Copper Sulfate/Sulfuric Acid, Boiling Annealed As Welded* Sensitized** no cracks no cracks cracked no cracks no cracks no cracks no cracks no cracks cracked no cracks no cracks cracked no cracks no cracks no cracks * TIG welded material. ** Samples heat treated at 1250°F(677°C) for one hour and air cooled. Results in bold letters are for tests that were discontinued because of high corrosion rates 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. © 2012 ATI. All rights reserved. VERSION 1 (3/9/2012): PAGE 3 of 9 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 201 HP™/ATI 201L HP™ Localized Corrosion The crevice corrosion behavior of ATI 201 HP™, 301, and 304 alloys in a sodium chloride solution are comparable. Susceptibility to crevice corrosion in chlorides increases with increases in temperature. Chloride Crevice Corrosion Resistance* Grade Test Temperature °F (°C) Average Corrosion Weight Loss g/cm2 ATI 201 HP™ Type 301 Type 304 100 (38) 100 (38) 100 (38) 0.0000 0.0000 0.0000 * Based on ASTM G48 Test Method, modified by testing duplicate samples in a 3.5% sodium solution with an adjusted pH of 4.0. OXIDATION RESISTANCE ATI 201 HP™ alloy possesses good resistance to oxidation and is comparable to type 301 up to about 1550°F (840°C); but it scales more rapidly above this temperature. For intermittent service, particularly when rapid cooling is involved, ATI 201 HP™ is not recommended for service conditions where temperatures above 1500°F (815°C) are encountered. Since the rate of oxidation is affected by the atmosphere to which the metal is exposed, by the heating and cooling cycle, and by the structural design, it is impossible to present data which would be applicable to all service conditions. PHYSICAL PROPERTIES Melting Range, °F (°C) 2550-2650 (1400-1455) Density, lb/in3 (g/cm3) 0.284 (7.86) Specific Gravity 7.86 Electrical Resistivity, (microhm-cm) 67 @ 68°F (20°C) Mean Coefficient of Thermal Expansion Temperature Range Mean Coefficient of Thermal Expansion °C °F cm/cm/°C in./in./°F 20-100 20-316 20-538 20-871 68- 212 68- 600 68-1000 68-1600 16.6 x 10-6 18.0 x 10-6 19.6 x 10-6 20.3 x 10-6 9.2 x 10-6 10.0 x 10-6 10.9 x 10-6 11.3 x 10-6 Thermal Conductivity Temperature Range W/m·K Btu/(hr·ft·°F) °C °F 20-100 68-212 16.3 9.4 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. © 2012 ATI. All rights reserved. VERSION 1 (3/9/2012): PAGE 4 of 9 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 201 HP™/ATI 201L HP™ Specific Heat Temperature Range J/kg·K Btu/lb./°F °C °F 0-100 32-212 502 0.12 Magnetic Permeability Properly annealed ATI 201 HP™ and ATI 201L HP™ alloys are fully austenitic materials and have a magnetic permeability generally less than 1.02. Cold working promotes the formation of martensite which results in an increase in magnetic permeability. This increase is dependent upon the exact alloy composition within the specified range, as well as on percent cold reduction. The data below illustrates the increase in magnetic permeability with cold rolling. Magnetic Permeability Percent Cold Reduction D. C. Permeability (µ at 200 H) ATI 201 HP™ ATI 201L HP™ Annealed 5 10 20 30 40 50 60 1.004 1.014 1.048 1.96 3.95 7.07 13.8 16.0 1.008 1.008 1.235 3.42 9.61 22.0 30.0 36.0 MECHANICAL PROPERTIES ATI 201 HP™ and ATI 201L HP™ alloys are used both in the fully annealed condition and in the cold rolled (temper rolled) condition. The mechanical properties of ATI 201 HP™ and ATI 201L HP™ alloys vary considerably depending upon the amount of cold work introduced. The response to cold work can be controlled to a certain extent by a balance of alloying elements. These grades develop higher tensile strengths than other more stable austenitic grades and for this reason have found a wide field of application in structural assemblies. ATI 201 HP™ and ATI 201L HP™ alloys may be cold rolled to very high strength levels as indicated in the tables below and the graphs on page 6. 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. © 2012 ATI. All rights reserved. VERSION 1 (3/9/2012): PAGE 5 of 9 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 201 HP™/ATI 201L HP™ Effect of Cold Reduction on Room Temperature Mechanical Properties of Sheet (Longitudinal) Percent Cold Reduction Tensile Strength ksi (MPa) Yield Strength (0.2% Offset) ksi (MPa) Elongation Percent in 2" (50.8mm) Hardness HRC ATI 201 HP™ ATI 201L HP™ ATI 201 HP™ ATI 201L HP™ ATI 201 HP™ ATI 201L HP™ ATI 201 HP™ ATI 201L HP™ Annealed 5 10 20 30 40 50 60 101.0 (696) 118.0 (814) 130.8 (902) 156.4 (1044) 176.2 (1214) 183.3 (1264) 216.9 (1495) 246.7 (1701) 114.0 (785) 125.4 (865) 138.8 (957) 165.3 (1140) 178.1 (1228) 212.8 (1467) 235.7 (1625) 256.2 (1766) 43.6 (301) 78.8 (543) 98.3 (678) 121.4 (837) 152.3 (1050) 158.3 (1091) 198.4 (1368) 239.2 (1649) 57.5 (396) 84.0 (579) 97.4 (672) 122.2 (843) 160.7 (1108) 205.8 (1419) 223.5 (1541) 246.1 (1697) 56.0 42.5 32.5 22.3 14.0 13.3 3.8 3.5 56.0 43.3 33.0 22.3 17.3 8.3 3.0 3.5 85.0 (HRB) 99.5 (HRB) 28.5 34.5 39.0 42.5* 45.5* 47.0* 93.0 (HRB) 25.0 31.0 38.0 41.0 44.5 48.5* 49.0* Samples from cold rolled sheet were tested at ambient temperature * HR30N test values were converted to HRC values per ASTM E140 Effect of Cold Reduction on Room Temperature Mechanical Properties of Sheet (Transverse) Percent Cold Reduction Tensile Strength ksi (MPa) Yield Strength (0.2% Offset) ksi (MPa) Elongation Percent in 2" (50.8mm) Hardness HRC ATI 201 HP™ ATI 201L HP™ ATI 201 HP™ ATI 201L HP™ ATI 201 HP™ ATI 201 HP™ ATI 201 HP™ ATI 201 HP™ Annealed 5 10 20 30 40 50 60 99.4 (685) 113.6 (783) 124.1 (856) 151.5 (1045) 177.5 (1224) 188.5 (1300) 220.7 (1522) 252.7 (1742) — 124.1 (856) 136.1 (938) 162.8 (1123) 181.7 (1253) 217.4 (1499) 236.6 (1631) 255.5 (1762) 42.4 (292) 82.5 (569) 93.5 (645) 115.3 (795) 144.5 (996) 156.4 (1078) 180.2 (1242) 251.0 (1731) — 86.7 (598) 103.8 (716) 132.7 (915) 158.5 (1093) 187.4 (1292) 200.3 (1381) 235.4 (1623) 62.5 38.0 31.3 17.5 11.5 11.3 4.8 1.5 — 43.0 32.8 18.0 14.3 7.8 3.5 3.3 85.0 (HRB) 99.5 (HRB) 28.5 34.5 39.0 42.5* 45.5* 47.0* — 25.0 31.0 38.0 41.0 44.5 48.5* 49.0* *HR30N test values were converted to HRC values per ASTM E140. 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. © 2012 ATI. All rights reserved. VERSION 1 (3/9/2012): PAGE 6 of 9 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 201 HP™/ATI 201L HP™ 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. © 2012 ATI. All rights reserved. VERSION 1 (3/9/2012): PAGE 7 of 9 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 201 HP™/ATI 201L HP™ Like other austenitic stainless steels, ATI 201 HP™ alloy does not exhibit a well defined transition from the elastic to the plastic range. For this reason, its yield strength is conventionally defined as the stress at which a line drawn with the initial slope of the stress-strain curve and the offset 0.2% on the abscissa intercepts the stress-strain curve. Cold rolled ATI 201 HP™ alloy shows slightly different properties in the direction of rolling and at right angles to this direction. There is also a considerable difference in yield strength in compression and in tension as is shown in the following data. Transverse Mechanical Properties of ATI 201 HP™ alloy in Tension and Compression Percent Cold Reduction Tension Compression Yield Strength (0.2% Offset) Modulus 106 psi Yield Strength (0.2% Offset) Modulus 106 psi ksi MPa ksi GPa ksi MPa ksi GPa Annealed 50.0 345 30.0 207 53.0 365 30.0 207 10 90.0 621 30.4 210 64.0 441 28.3 195 20 121.7 839 27.8 192 73.0 503 27.5 190 40 164.0 1131 26.6 183 86.7 598 26.8 185 The data shown below illustrate the effect of stress relieving at 800°F (427°C) on material from the same heat used to obtain the preceding data. Stress relieving in the range of 600 to 900°F (315-482°C) can reduce the differences in modulus induced by cold rolling, increase the yield strength, and minimize the differences in longitudinal and transverse properties. This tendency increases with increasing cold reduction as a general rule. Compressive yield strength in the longitudinal direction is most affected by such stress relief treatments. Effect of Stress Relieving on ATI 201 HP™ Alloy Transverse Mechanical Properties Percent Cold Reduction Tension Compression Yield Strength (0.2% Offset) Modulus 106 psi Yield Strength (0.2% Offset) Modulus 106 psi ksi MPa ksi GPa ksi MPa ksi GPa 10 100.0 689 29.5 203 92.8 640 29.8 205 20 130.2 898 27.6 190 123.2 850 29.0 200 40 181.8 1253 28.4 196 154.5 1065 30.0 207 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. © 2012 ATI. All rights reserved. VERSION 1 (3/9/2012): PAGE 8 of 9 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 201 HP™/ATI 201L HP™ ELEVATED TEMPERATURE STRENGTH PROPERTIES Typical Short Time Tensile Properties Test Temperature °F (°C) Yield Strength 0.2% Offset ksi (MPa) Tensile Strength ksi (MPa) Elongation Percent in 2" (50.8mm) 68 20 200 93 400 204 600 316 800 427 1000 538 1200 649 1400 760 1600 871 53.0 365.8 38.9 268.1 30.9 213.0 27.4 188.6 26.2 180.7 23.4 161.4 20.5 141.2 18.2 125.4 14.0 96.7 117.3 808.6 97.6 673.2 81.4 561.0 79.0 545.0 76.5 527.7 69.5 479.4 47.6 328.3 27.2 187.6 18.9 130.5 55.5 62.5 46.5 44.0 45.5 33.0 28.5 27.5 55.0 The short time high temperature properties of a representative heat of ATI 201 HP™ Alloy in the annealed condition are shown. Above 800°F (427°C), design should be based on creep and stress-rupture properties. Typical Stress Rupture Properties Test Temperature °F (°C) Rupture Stress, psi (MPa) Elongation Percent in 2" (50.8mm) 100 hrs 1,000 hrs 10,000 hrs 100 hrs 1,000 hrs 1200 649 1350 734 1500 816 29,000 200 15,000 103 7,400 51 22,000 152 10,000 69 4,000 28 16,500 114 6,600 45 14 16 35 14 22 42 HEAT TREATMENT ATI 201 HP™ and ATI 201L HP™ alloys are annealed between 1850-2000°F (1010-1093°C). Annealing practices applied to type 301 are, in general, suitable for ATI 201 HP™ and ATI 201L HP™ alloys, although it is recommended that annealing temperatures do not exceed 2000°F (1093°C) to avoid excessive oxidation. The primary purposes of annealing are to relieve strain, recrystallize the material if it has been cold worked, and take carbides into solution. For ATI 201 HP™ alloy, rapid cooling through the carbide precipitation range is necessary to keep carbides in solution. For thin sections, air cooling is usually sufficient, while heavier sections should be water quenched. If the work can be cooled to “black” within 3 minutes by air cooling, this practice is preferred. When properly annealed, ATI 201 HP™ and ATI 201L HP™ alloys are predominantly austenitic. However, they may contain small amounts of delta ferrite. Cold rolling promotes the formation of martensite. Exposure to the temperature range 800- 1500°F (427-816°C) results in grain boundary carbide precipitation. FABRICATION Welding ATI 201 HP™ and ATI 201L HP™ can be welded by all conventional methods applied to 18 percent chromium, 8 percent nickel steels. Filler wire or electrodes of the conventional chromium-nickel analyses can be used. Like other chromium-nickel 300 series austenitic stainless steels where carbon is not controlled below 0.03%, ATI 201 HP™ alloy is sensitive to intergranular corrosion in the weld heat affected zone. Hot Working ATI 201 HP™ and ATI 201L HP™ alloys have hot working characteristics similar to that of 300 series stainless steels. The normal hot working range for ATI 201 HP™ and ATI 201L HP™ alloys are 2100-2250°F(1150-1230°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. © 2012 ATI. All rights reserved. VERSION 1 (3/9/2012): PAGE 9 of 9 Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Technical Data Sheet ATI 201 HP™/ATI 201L HP™ Cold Forming In most applications where ATI 201 HP™ and ATI 201L HP™ alloys have been used, bending, forming and drawing operations have been successfully carried out following essentially the same practice as employed for type 301. SPECIFICATIONS ASTM A240 ASTM A480 ASTM A666 ASTM A262