AISI E52100

All DIGEST Or Composition: carbon Manganese Phosphorus Sulphur Silicon Chromium Iron Filing Code: SA-16 Steel Alloy APRIL, 1954 - DATA ON WORLD WIDE METALS AND ALLOYS AISI ES2 100 (Bearing Steel) AISI E52100 is a high-carbon, chromium alloy steel of the water hardening type. It has great depth hardenability and high wear resistance. 0.95-1.10 0.25-0.45 0.025 max. 0.025 max. 0.20-0.35 1.30-1.60 balance Physical Constant= Specific gravity, g/‘cc Density, lb./cu. in. Thermal coe&cient expansion, “F Modulus of elasticity, psi Modulus of rigidity, psi if3 0:0000069 29,000,OOO 12,000,000 .%CtiOtl Condition Tensile strength, psi Yield strength, psi Elongation, $70 in 2” Reduction of area, ye Brinell hardness PROPERTIES Table 1 - TYPICAL MECHANICAL 1” Round Spheroidire AMES&~ Turned & Cold Polished Drawn 107000 Z% 875000 27.0 17.0 62.5 54.9 179 229 PROPERTIES 7 116” Round Soheroidize Annealed Cold Drawn l/32” Draft l/16\" Draft 104800 124000 91200 106000 25.0 16.0 57.0 50.0 229 262 Table 2 -EFFECT OF TEMPERING TEMPERATURE ON HEAT TREATED PROPERTIES Yield Tensile Elongation Reduction Tempering Brined Point StEflgth 70 in 2” Temperature Hardness of h-9 70 psi OF psi E 200000 237000 226000 185000 30 444 1000 1100 1200 165000 140000 120000 145000 125000 95000 : 1: z 47 :: 315 277 Table 3 - EFFECT OF MASS ON HEAT TREATED HARDNESS (Oil Quenched at 1550°F, or Water Quenched at 1525OF, and Tempered as Indicated) Hardness-Rockwell “c” l/2\" Section Oil 67 As Quenched Surface Mid-Radius 2 Center 63 Temper 300°F Surface Mid-Radius it; center 62 Temper 400°F Surface Mid-Radius :; Center 58 Temper 500°F Surface Mid-Radius ii Center Alloy Digest Copyright© ASM International® 2002

Table 4 - APPROXIMATE HARDNESS OBTAINABLE AT VARIOUS LOW TEMPERING TEMPERATURES Tempering Temperature, OF Rockwell “c” Hardness 200 63-64 300 62-63 60.61 E 58-60 55-57 700 50-54 Table 6 - END QUENCH HARDENABILITY Composite Average l/S” l/4“ l/2” 65 64 “2“ 50 5i;* Table 7 - TORSION IMPACT PROPERTIES (Water Quenched and Tempered) Tempering Temperature OF 70 100 200 250 300 350 % :: 600 Torsion Impact ft. lbs. 43.5 1% 44.0 95.0 7615 iiz0” 61.5 59.5 47.0 Rodrwell Hardness “c” z:; E 6315 63.0 61.0 62.0 59.0 60.0 58.0 and a nose radius of locY, of cut depth. Carbide-tipped tools should be ground to 4-7 deg. side rake, O-5 deg. back rake, 6-8 deg. side relief, 6-9 deg. end relief. 8-12 deg. end cutting-edge angle, lo-18 deg. side cutting-edge angle, and a nose radius of l/32 inch- FORM CUTTING (Spheroidiz- ealed bars of 207 max. BrineII) Width of Cut Feed speed in/rev. inch &m - - 0.0015 70-80 up to 1 Forming lto2 70-80 0.00125 70-80 2 to 2 l/2 0.001 Circular or 2 l/2 to 3 dovetail 3 and up cutoff :/fs” 3/16 l/4 TFg a - and Workability: Forge at 1800-1950 deg. F. Forms Available: Hot rolled and cold rolled bars. AppIicatEons: Bearings, tools, punches, machinery parts, bushings, inner and outer bearing races, liner pins, and other parts requiring high wear resistance and high eIas- ticity. Specification Equivalents: SAE 52100 A.&S 6440 and 6441 Air Force 10243 United Kingdom En31 Manufacturer: Practically all steel mills. Table 5 - TYPICAL HOT ROLLED PROPERTIES Annealed Normdized Tensile strength, psi 100000 185000 Yield point, psi 81000 139000 Elongation, 70 in 2” 25 13 Reduction of area, To 57 Brim& hardness 192 3:; l/6:6” 3i; ‘if” ” :1 Heat Treatmen): AC, 1340 Art, 1320 Acs 1415 Arl 1270 NORMALIZE: Air cool from 1650-1700 deg. F. ANNEAL: Furnace cool from 1425-1450 deg. F. SPHEROIDIZE: Slow cool (about 5 deg./In) following austenitizing by extended heating at a temperature near the Acm point, or by isothermal transformation at 1275 deg. F following austenitizing. HARDEN: Quench in water from 1425-1475 deg. F or quench in oil from 1500-1600 deg. F, rhen temper to desired hardness. MARTEMPER: Heat to 1550 deg. F, quench in a salt bath at 500 deg. F, hoId at 500 deg. F about 5 minutes per inch of cross-section, cool in air, temper at 350 deg. F to obtain GO-63Rc. General Characteristics: AISI E52100 bearing steel is a deep hardening alloy having high resistance to wear, medium toughness, and low resistance to softening at high temperatures. It is usually quenched with carbides in the austenite. When the manganese is lower than 0.3570, it can be waterhardened. Under all conditions of heat treatment they show much greater dimensional changes than carbon steels of corresponding carbon content Machinability: For most machining operations a fully spheroid&d rather than pearlitic structure is preferred. Spheroidiae annealed, cold drawn bars has a mach- inability rating of 37% of AISI B1112 steel and cuts at a speed of 63 sfpm. The character of its chips is continuous and stringy. Hot rolled, annealed bars has a machinability rating of 45% of AISI B1112 steel. Single point turning tools of high speed steel should be ground to 5-10 deg. side rake, 5-8 deg. back rake. 6-8 deg. side rehef, 6-8 deg. end relief, 8-12 deg. end cutting-edge angle, 5-15 deg. side cutting-edge angle