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0inimum and 0aximum 25 Carbon accurate alloy steels Area 2 Inch barium carbonate carbon content Carbon SAE Specification Cent Nickel Steel Centigrade CHAPTER Chrome Nickel Steel chromium cooling medium critical temperature degree depend Desired 0.0 Drawing Tempera elastic limit equipment factors Fahr Fahrenheit forging furnace hardening boxes hardening mixture Hardness scope Hardness high carbon High Speed Steel high temperatures inasmuch Inch Hardness scope lead bath low carbon machine manufacture material molten lead molten salt necessary Nickel Steel S. A. E. numbers obtained Oleic Acid operation perature percentage Phosphorus 0aximum physical properties piece of steel potassium cyanide produce pyrometer Quench in oil quenching bath quenching medium quenching tanks quenching temperature Red Heat Round Square scleroscope scope Hardness 400 sodium chloride Specification 0o square inch Steel Tool Steel Strength Limit Area Sulphur 0aximum surface Tensile Elastic Red Tensile Strength testing thermo couple Tool Steel Tool tough ture Tensile Elastic