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Stainless Steel - Austenitic |
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Austenitic stainless steels are the most commonly used materials produced by ATI Allegheny Ludlum. This class of stainless steel includes both the 200 and 300 series alloys, which are hardenable by cold working. The 300 series alloys contain chromium and nickel as their major alloying additions. Type 304 (also known as 18-8) is the most widely used of all stainless steel alloys. The 200 Series alloys possess mechanical and corrosion resisting properties similar to 300 Series materials. They also exhibit high hardness and yield strength as well as excellent ductility and are usually non-magnetic. The 200 series alloys were originally developed to conserve nickel by replacing it with manganese at a ratio of 2% manganese for each 1% of nickel replaced. This reduced nickel content results in the 200 series alloys having a lower and more stable cost than the 300 series materials.
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Stainless Steel - Austenitic | |
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| Alloy (UNS Designation) |
End Use | Composition nominal wt% |
Specifications | Density lb/in3 (g/cm3) |
Tensile Strength ksi. (MPa) |
0.2% Yield Strength ksi. (MPa) |
Elong- ation % |
Hardness | ||
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| AL 201HP™
S20100 |
Cookware Bodies & Lids, Hose Clamps, Piston Rings, Washing Machine Baskets, Thermal Window Spacers, Air Bag Containers, Appliances, Food Service Equipment. | C 0.15 max, Mn 5.5-7.5 P 0.06 max, S 0.03 max, Si 1.0 max, Cr 16.0-18.0, Ni 3.5-5.5, N 0.25 max, Fe Balance | ASTM A240 ASTM A666 ASME SA-240 ASME SA-666 ANSI/NSF 51 | 0.284 (7.86) |
75 min (201-1) / 95 min (201-2) (515 min / 655 min) |
38 min (201-1) / 45 min (201-2) (260 min / 310 min) |
40 min | 100 Rockwell B max | ||
| AL 201L HP™
S20103 |
Transit Car Structural Member, Transit Car Roofing/Siding, Truck Trailer Posts and Door Frames. | C 0.03 max, Mn 5.5-7.5 P 0.045 max, S 0.03 max, Si 0.75 max, Cr 16.0-18.0, Ni 3.5-5.5, N 0.25 max, Fe Balance | ASTM A240 ASTM A666 ASME SA-240 ASME SA-666 ANSI/NSF 51 | 0.284 (7.86) |
95 min (655 min) |
38 min (40 min) |
260 min | 95 Rockwell B max | ||
| AL 201LN™
S20153 |
Liquified Gas Storage Vessels, Portable Gas Storage Tanks, Freight Railcars, Truck Trailers, Coal Handling and other transportation equipment | C 0.03 max, Mn 6.4-7.5, P 0.045 max, S 0.015 max, Si 0.75 max, Cr 16.0-17.5, Ni 4.0-5.0, N 0.10-0.25, Cu 1.0 max, Fe Balance | ASME SA-240 ASTM A240 ASTM A666 ANSI/NSF 51 | 0.284 (7.86) |
95 min (655 min) |
45 min (310 min) |
45 min | 100 Rockwell B max | ||
| ATI 219™
S21904 |
Hydraulic tubing for aircraft | C 0.04 max, Mn 8.0-10.0, P 0.06 max, S 0.03 max, Si 0.75 max, Cr 19.0-21.5, Ni 5.5-7.5, N 0.15-0.40, Fe Balance | ASTM A-666 AMS 5595 | 0.290 (8.03) |
100 min (690 min) |
60 min (415 min) |
40 min | - | ||
| ATI 50™
S20910 |
Flood control barriers, spent nuclear storage containers, heat exchanger equipment, pumps, and structural components. | Cr 20.5-23.5%, Ni 11.5-13.5%, Mn 4.0-6.0%, Mo 1.5-3.0%, N 0.20-0.40%, V 0.10-0.30%, Cb 0.10-0.30%, C 0.06% max., Si 0.75% max., Fe balance. | ASTM A240 (XM-19), ASME SA-240 (XM-19), AMS 5681 | 0.285 (7.89) |
100,000 (690) |
55,000 (380) |
35% | 241 BHN max | ||
| 301
S30100 |
Decortative structures; auto molding & trim, wheel covers; conveyor belts; kitchen equipment; roof drainage systems; hose clamps; springs; truck and trailer bodies; railway and subway cars | C 0.15 max, Mn 2.0 max, P 0.045 max, S 0.3 max, Si 1.0 max, Cr 16.0-18.0, Ni 6.0-8.0, N 0.1 max, Fe Balance | ASTM A240 ASTM A666 | 0.290 (8.03) |
75 min (515 min) |
30 min (205 min) |
40 min | 95 Rockwell B max | ||
| 302
S30200 |
Refrigerators, dishwashers, blenders, mixers, washing machines, counters and racks | C 0.15 max, Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max Cr 17.0-19.0, Ni 8.0-10.0, N 0.1 max, Fe Balance | ASTM A240 ASME SA-240 | 0.285 (7.90) |
75 min (515 min) |
30 min (205 min) |
40 min | 92 Rockwell B max | ||
| 303
S30300 |
Medical and pharmaceutical components and parts | C 0.15 max, Mn 2 max, Si 1.0 max, Cr 17.0-19.0, Ni 8.0-10.0, P 0.20 max, S 0.15 min, Mo 0.60 max, Fe Balance | ASTM A895 SAE J405 | 0.290 (8.03) |
75-90 (517-621) |
30-40 (207-276) |
35-50 | 202 HBN max | ||
| 304 / 304L
S30400 / S30403 |
Sanitary, cryogenic, and pressure-containing applications, home and commercial appliances, ethanol production, tank structural parts, processing equipment, and tubing. | Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max, Cr 17.5-19.5, N 0.10 max, Fe Balance Type 304: C 0.07 max, Ni 8.0-10.5 Type 304L: C 0.03 max, Ni 8.0-12.0 | ASTM A240 ASME SA-240 | 0.285 (7.90) |
75 min / 70 min (515 min / 485 min) |
30 min / 25 min (205 min / 170 min) |
40 min | 92 Rockwell B max | ||
| Minimiser® 304/304L
S30400 / S30403 |
Heat exchangers and components requiring heavy machining. Aim of 0.025 S for improved machinability. | C 0.01, Mn 1.7, P 0.03, S 0.025, Si 0.6, Ni 9.5, Cr 18.25, N 0.06, Fe Balance | ASTM A240 | 0.285 (7.90) |
75 min / 70 min (515 min / 485 min ) |
30 min / 25 min (205 min / 170 min ) |
40 min | 92 Rockwell B max | ||
| AL 304 DA™
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Cookware, food preparation, meat processing, brewery, wine, juice, soft drink and related industries | C .08, Mn 2, P .045, S .03, Cr 18-20, Ni 8-10.5, N .10, Ti res, Cb res, Fe bal | 0.284 (7.86) |
73 (500) |
38 (260) |
46 | 76 Rockwell B | |||
| 305
S30500 |
Writing instruments, utensils, tank covers and drawn housings | C 0.12 max, Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max, Cr 17.0-19.0, Ni 10.5-13.0, Fe Balance | ASTM A240 ASME SA-240 | 0.285 (7.90) |
70 min (485 min) |
25 min (170 min) |
40 min | 88 Rockwell B max | ||
| 309 / 309S
S30900 / S30908 |
Furnace parts - conveyor belts, rollers, burner parts, refractory supports, retorts and oven linings, fans, tube hangers, baskets and trays to hold small parts; containers for hot concentrated acids, ammonia and sulfer dioxide; contact with hot acetic and citric acid. | Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max, Cr 22.0-24.0, Ni 12.0-15.0, Fe Balance Type 309: C 0.20 Type 309S: C 0.08 | ASTM A167 ASTM A240 | 0.29 (8.03) |
75 min (515 min) |
30 min (205 min) |
40 min | 95 Rockwell B max | ||
| 310 / 310S
S31000/S31008 |
Furnace parts such as conveyor belts, rollers, burner parts, refractory supports, retorts and oven linings, fans, tube hangers, and baskets and trays to hold small parts. Chemical process industry to contain hot concentrated acids, ammonia, and sulfur dioxide and in the food processing industry, they are used in contact with hot acetic and citric acid | Mn 2.0 max, P 0.045 max, S 0.03 max, Si 1.5 max, Cr 24.0-26.0, Ni 19.0-22.0, Fe Balance Type 310: C 0.25 max Type 310S: C 0.08 max | ASTM A167 / ASTM A240 | 0.29 (8.03) |
75 min (515 min) |
30 min (205 min) |
40 min | 95 Rockwell B max | ||
| 316 / 316L
S31600 / S31603 |
Handling hot organic and fatty acids, boat rails and hardware and facades of buildings near the ocean. Used to maximize life cycle costs in pulp and paper production equipment. | Mn 2.0 max, P 0.045 max, S 0.03 max,Si 0.75 max, Cr 16.0-18.0, Ni 10.0-14.0, Mo 2.0-3.0, N 0.1 max, Fe Balance Type 316: C 0.08 max Type 316L: C 0.03 max | ASTM A240 ASME SA-240 | 0.29 (8.03) |
75 min / 70 min (515 min / 485 min) |
30 min / 25 min (205 min / 170 min) |
40 min | 95 Rockwell B max | ||
| Minimiser® 316/316L
S31600 / S31603 |
Heat exchangers and components needing heavy machining. Aim of 0.025 S for improved machinability. | C 0.01, Mn 1.7, P 0.03, S 0.025, Si 0.6, Ni 10.15, Cr 16.25, Mo 2.5, N 0.05, Fe Balance | ASTM A240 | 0.29 (8.03) |
75 min / 70 min (515 min / 485 min) |
30 min / 25 min (205 min / 170 min) |
40 min | 95 Rockwell B max | ||
| 316LN
S31653 |
Provides moderate resistance to chlorides and hot organic and fatty acids. | C 0.03 mac, Mn 2.0 max, P 0.045 max, S 0.03 max,Si 0.75 max, Cr 16.0-18.0, Ni 10.0-14.0, Mo 2.0-3.0, N 0.10-0.16, Fe Balance. | ASTM A240 ASME SA-240 | 0.29 (8.03) |
75 min (515 min) |
30 min (40 min) |
205 min | 95 Rockwell B max | ||
| 316Ti
S31635 |
Used for equipment exposed to aggressive corrosive conditions and high temperature applications,including automotive flexible connectors, welded bellows, chimney liners, and flexible ducting. | C 0.08 max, Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max, Cr 16.0-18.0, Ni 10.0-14.0, Mo 2.0-3.0, N 0.1 max, Ti 5(C+N)min-0.70 max, balance Fe | ASTM A240, ASME SA-240 | 0.289 (8.00) |
75 min (515 min) |
30 min (205 min) |
40 min | 95 Rockwell B max | ||
| 317 / 317L
S31700 / S31703 |
Handling hot organic and fatty acids, processing equipment, boat rails and hardware, and facades of buildings near the ocean | Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max, Cr 18.0-20.0, Ni 11.0-15.0, Mo 3.0-4.0, N 0.10 max, Fe Balance Type 317: C 0.08 max Type317L: C 0.03 max | ASTM A240 ASME SA-240 | 0.29 (8.03) |
75 min (515 min) |
30 min (205 min) |
35 min / 40 min | 95 Rockwell B max | ||
| 317LMN
S31726 |
Pulp and paper equipment, flue gas desulfurization equipment. | C 0.03 max, Mn 2.0 max, P 0.045 max, S 0.03 max,Si 0.75 max, Cr 17.0-20.0, Ni 13.5-17.5, Mo 4.0-5.0, N 0.10-0.20, Fe Balance | ASTM A 240 ASME SA-240 | 0.29 (8.03) |
80 min (550 min) |
35 min (240 min) |
40 min | 96 Rockwell B max | ||
| 321
S32100 |
Boiler and pressure vessels | C 0.08 max, Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max, Cr 17.0-19.0, Ni 9.0-12.0, N 0.1 max, Ti 5x(C+N)min-0.7 max, Fe Balance | ASTM A240 ASME SA-240 AMS 5510 | 0.286 (7.92) |
75 min (515 min) |
30 min (205 min) |
40 min | 95 Rockwell B max | ||
| AL 332™
N08800 |
Furnace parts and related equipment; petrochemical reforming units and isocracker tubes; superheated steam use in powerplants; sheathing of electrical resistance heating elements | C 0.10 max, Mn 1.5 max, P 0.045 max, S 0.015 max, Si 1.0 max, Cr 19.0-23.0, Ni 30.0-35.0, Ti 0.15 -0.60, Al 0.15 -0.60, Cu 0.75 max, Fe Balance | ASTM A240 ASME SA-240 | 0.290 (8.03) |
86 min (590 min) |
42 min (290 min) |
44 min | - | ||
| AL 332Mo™
S35125 |
For automotive flexible connectors, it resists both aqueous corrosion and elevated temperature degradation while exhibiting weldability and formability. | C 0.10 max, Mn 1.0-1.5, P 0.045 max, S 0.015 max, Si 0.5 max, Cr 20.0-23.0, Ni 31.0-35.0, Mo 2.0-3.0, Cb 0.25 -0.60, Fe Balance | ASTM A240 ASTM A480 | 0.294 (8.13) |
70 min (485 min) |
30 min (205 min) |
35 min | - | ||
| AL 334™
S33400 |
Heated electric heating elements | C 0.08 max, Mn 1.0 max, P 0.03 max, S 0.015 max, Si 1.0 max, Cr 18.0-20.0, Ni 19.0-21.0, Ti 0.15-0.60, Al 0.15-0.60, Fe Balance | UL 1030, ASTM A 240 | 0.29 (8.03) |
70 min (485 min) |
25 min (170 min) |
40 | 92 Rockwell B max | ||
| 347
S34700 |
Radiant heaters, Aerospace components and Oil Refining equipment | C 0.08 max, Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max, Cr 17.0-19.0, Ni 9.0-13.0, Cb 10xC min-1.0 max, Fe Balance | ASTM A240 ASME SA-240 | 0.288 (7.96) |
75 min (515 min) |
30 min (205 min) |
40 min | 95 Rockwell B max | ||
| 348
S34800 |
Nuclear power applications | C 0.08 max, Mn 2.0 max, P 0.045 max, S 0.03 max, Si 0.75 max, Cr 17.0-19.0, Ni 9.0-13.0, (Cb+Ta)10xC min - 1.0 max, Ta 0.10 max, Co 0.2 max, Fe Balance | ASTM A240 ASME SA-240 | 0.288 (7.96) |
75 min (515 min) |
30 min (205 min) |
40 min | 92 Rockwel B max | ||
| ATI 20-25+Nb™
S35140 |
heat exchangers, heat recuperators, high temperature equipment | 20% Cr, 25% Ni, 1.5% Mn, 1.5% Mo, 0.35% Nb, 0.15% N, 0.05% C, balance Fe | 0.29 (7.96) |
95 (655) |
45 (310) |
35% | ||||
| AL 610™
S30600 |
Vessels, Heat exchangers, Piping, Valves, Pumps and Nitric Acid Storage | C 0.018 max, Mn 2.0 max, P 0.02 max, S 0.02 max, Si 3.7-4.3, Cr 17.0-18.5, Ni 14.0-15.5, Mo 0.20 max, Cu 0.50 max, Fe Balance | ASTM A240 | 0.277 (7.67) |
78 min (540 min) |
35 min (240 min) |
40 min | - | ||
| AL 611™
S30601 |
Vessels, heat exchangers, piping, valves, pumps and nitric acid storage | C 0.015 max, Mn 0.5-0.8, P 0.03 max, S 0.013 max, Si 5.0-5.6, Cr 17.0-18.0, Ni 17.0-18.0, Mo 0.20 max, N 0.05 max, Cu 0.35 max, Fe Balance | ASTM A240 | 0.274 (7.59) |
75 min (540 min) |
37 min (255 min) |
30 min | - | ||
| Nonmagnetic grade 9
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Drilling equipment, mining equipment, electrical equipment. | 12.4 Mn, 4.2 Cr, 3.2 Ni, 0.5 Mo, 0.35 C, Fe Balance | 0.286 (7.91) |
120 (830) |
85 (585) |
40 | 230 BHN | |||
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