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Ameralloy-6 is in the general class of oil hardening alloy tool steels. Due to its lower carbon content, it has slightly better shock resistance than more highly alloyed types, and should be used in applications where some wear resistance may be sacrificed for increased toughness.

Typical Analysis

  • Carbon .75
  • Manganese .75
  • Chromium .90
  • Nickel 1.75
  • Molybdenum .35

Features And Advantages

  • Oil hardening
  • Low distortion in heat-treatment
  • Good toughness at lower hardness levels
  • Good wear resistance at high hardness levels

Heat Treatment

  • Forging 2100°–2175°F, stop at 1700°F, cool slowly
  • Normalizing Do not normalize
  • Annealing 1400°F, furnace-cool. Brinell 217 max.
  • Hardening 1500°–1550°F, oil-quench
  • Tempering 400°F, average hardness after heat treatment Rockwell C 60–61
  • Hardening Ameralloy-6 should be preheated at 1200°F, soaked, then raised to a hardening temperature of 1500°–1550°F and held for 1 hour per inch of greatest thickness. Oil-quench to 150°F and temper immediately. Tools made of Ameralloy-6 in sections less than 1” thickness may be air-quenched from 1500°F, providing safer hardening of intricate sections. Air-quenching also results in less distortion.

    Ameralloy-tested hardness and fracture grain ratings for air-blast and oil-quenching temperatures. Specimen size 1” round x 5”:

    AIR-BLAST OIL-QUENCH
    Quenching Temperature (°F) Fracture Grain Size Rockwell C Fracture Grain Size Rockwell C
    1400° 61 63
    1450° 63 64
    1500° 63 64.5
    1525° 63 64.5
    1550° 63 64
    1600° 63 63
    1650° 63 63
    1700° 8 62.5 62
    1750° 8 62.5 61.5
    1800° 7 62 7 61
  • Tempering Temper Ameralloy-6 at 400°. Some hardness may be sacrificed in favor of increased toughness by using higher tempering temperatures.
    Unlike many die steels, Ameralloy-6 does not become brittle when tempered in the range of 450°–800°F. Hold a minimum of 1 hour per inch of greatest thickness when tempering at 400°F. To minimize the possibility of cracking, temper immediately after hardening by heating slowly to the desired tempering temperature.

    Resulting Rockwell hardness for tempering air-blast and oil-quenched specimens 7/8” round x 2-1/2” long at various temperatures:

    Tempering Temperature (°F ) AIR-BLAST 1500°F Rockwell C OIL-QUENCH 1525°F Rockwell C
    No draw 63 65
    300° 59.5 62
    400° 57.5 61
    500° 56.5 58
    600° 55 56
    700° 51 53
    800° 49 50
    900° 47.5 48
    1000° 43.5 46

    Above results on 7/8” diameter specimens may be used as a guide in tempering tools to desired hardness. Tools of heavy section or mass may be several points lower in Rockwell hardness for a given treatment.

Applications

  • Forming rolls
  • Pawls
  • Punches
  • Knuckle pins
  • Blanking dies
  • Clutch pins
  • Forming dies
  • Shear blades
  • Clutch parts
  • Spindles

General Instructions

  • Forging Heat Ameralloy-6 slowly and uniformly to 2100°–2175°F, and do not forge below 1700°F. If a preheater is available, hold at 1200°F until uniformly heated before increasing temperature to the forging heat. Because of its air-hardening properties, for slow cooling bury in dry lime, silocel, or other insulating medium immediately after forging.
  • Annealing Heat to 1400°F and hold 1 hour per inch of greatest thickness. Cool at 20°F per hour to 900°F then air-cool. A maximum hardness of Brinell 217 will be obtained following this treatment. Because of it airhardening ability, Ameralloy-6 should not be normalized.

Available Shapes And Sizes

Rounds Hot Rolled Annealed

    • 1/4
    • 5/16
    • 3/8
    • 7/16
    • 1/2
    • 9/16
    • 5/8
    • 11/16
    • 3/4
    • 13/16
    • 7/8
    • 15/16
    • 1
    • 1-1/16
    • 1-1/8
    • 1-1/4
    • 1-5/16
    • 1-3/8
    • 1-1/2
    • 1-5/8
    • 1-3/4
    • 1-7/8
    • 2
    • 2-1/8
    • 2-1/4
    • 2-3/8
    • 2-1/2
    • 2-5/8
    • 2-3/4
    • 2-7/8

Rough Turned Rounds 5” And Over

    • 3
    • 3-1/8
    • 3-1/4
    • 3-3/8
    • 3-1/2
    • 3-3/4
    • 4
    • 4-1/4
    • 4-1/2
    • 4-3/4
    • 5
    • 5-1/4
    • 5-1/2
    • 5-3/4
    • 6
    • 6-1/4
    • 6-1/2
    • 6-3/4
    • 7
    • 7-1/4
    • 7-1/2

Squares

    • 1/2
    • 5/8
    • 3/4
    • 1
    • 1-1/4
    • 1-1/2
    • 1-3/4
    • 2
    • 2-1/4
    • 2-1/2

Flats Hot Rolled Annealed

    • 1/4
    • x 1-1/4
    • x 2-1/4
    • 3/8
    • x 1
    • x 1-1/4
    • x 1-1/2
    • x 2
    • x 3
    • x 4
    • 1/2
    • x 1
    • x 1-1/4
    • x 1-1/2
    • x 1-3/4
    • x 2
    • x 3
    • x 4
    • x 6
    • 5/8
    • x 1
    • x 1-1/4
    • x 1-1/2
    • x 2
    • x 2-1/2
    • x 3
    • x 4
    • x 5
    • 3/4
    • x 1
    • x 1-1/4
    • x 1-1/2
    • x 1-3/4
    • x 2
    • x 2-1/2
    • x 3
    • x 3-1/2
    • x 4
    • x 5
    • x 6
    • x 8
    • 1
    • x 1-1/4
    • x 1-1/2
    • x 1-3/4
    • x 2
    • x 2-1/2
    • x 3
    • x 3-1/2
    • x 4
    • x 4-1/2
    • x 5
    • x 6
    • x 8
    • 1-1/4
    • x 1-1/2
    • x 1-3/4
    • x 2
    • x 2-1/2
    • x 3
    • x 4
    • x 5
    • x 6
    • x 8
    • x 10
    • 1-1/2
    • x 1-3/4
    • x 2
    • x 2-1/2
    • x 3
    • x 3-1/2
    • x 4
    • x 5
    • x 6
    • x 8
    • x 10
    • 1-3/4
    • x 2
    • x 2-1/2
    • x 3
    • x 3-1/2
    • x 4
    • x 4-1/2
    • x 5
    • 2
    • x 2-1/2
    • x 3
    • x 3-1/2
    • x 4
    • x 4-1/2
    • x 5
    • x 6
    • x 8
    • x 10
    • 2-1/4
    • x 4
    • x 6
    • 2-1/2
    • x 3
    • x 3-1/2
    • x 4
    • x 4-1/2
    • x 5
    • x 6
    • 3
    • x 4
    • x 5
    • x 6
    • 3-1/2
    • x 4
    • 4
    • x 5
    • x 6