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Ameralloy-20

Color Code:
TAN WITH ORANGE STRIPE

Ameralloy-20 is a chrome-moly tool steel made specifically to fill the requirements for machined cavities and forces used in zinc die casting and plastic molding. Ameralloy-20 is delivered fully quenched and tempered to approximately Brinell 300. Other hardness levels may be obtained through additional heat treatment.

Typical Analysis

  • Carbon .35
  • Manganese .80
  • Chromium 1.70
  • Silicon .50
  • Molybdenum .45

Features And Advantages

  • Usually eliminates heat treating by customer
  • Mold quantity – electric furnace melted, vacuum degassed and ultrasonically inspected
  • Good machinability
  • Available in a wide range of sizes
  • Deep hardening
  • Uniform mechanical properties

Applications

  • Cavities and cores of zinc die casting dies
  • Plastic molding dies
  • Compression and transfer molds

Heat Treatment

For most zinc die casting and plastic molding operations, no further heat treatment is required. However, if the material is committed to reforging,  if  higher  hardness  is  required, or if stress relieving is necessary after heavy machining, the following cycles are suggested:

Stress relieving 1000°F, air cool

Forging Heat to 2000°F, stop at 1700°F and cool slowly

Normalizing Do not normalize

Annealing 1450°–1500°F, furnace cool. Brinell 207 max.

Hardening 1550°F, oil-quench to 150°F.

Tempering Temper at 300°–400°F for Rockwell C-54/55

Nitriding 1000°–1025°F for 25 hours produces 0.025” case depth

Carburizing 1700°F for 8 hours produces approximately 0.05” case depth

Ameralloy-20CHROME-MOLY STEEL AISI P-20

Available Shapes And Sizes

  • Rounds
  • Squares
  • Flats

ROUNDS: Standard lengths 8’–10’ R/L. FLATS & SQUARES: Standard lengths 8’–12’ R/L. Specify O.D. and I.D. Modified and special sizes available upon request. Prompt forging service available.

Rounds/Squares

Rounds Squares
3/4
1
1-1/4
1-1/2
1-3/4
2
2-1/8
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
4
4-1/4
4-1/2
5
5-1/2
6
6-1/2
7
7-1/2
8
8-1/2
9
10
11
12
14
14-1/2
16
18
20
24
1
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/2
4
5
6

Centerless ground rounds, heat treated & rough turned.

Flats Machine Oversize / Allowance to finish

1
x 2-1/4
x 6
x 8
x 12
x 18
x 36
1-1/4
x 10
x 12
x 16
1-1/2
x 3
x 6
x 7
x 8
x 10
x 12
x 14
x 16
x 18
x 20
x 36
2
x 4
x 6
x 7
x 8
x 10
x 12
x 14
x 16
x 18
x 20
x 36
2-1/4
x 12
x 14
2-1/2
x 6
x 8
x 10
x 12
x 14
x 16
x 20
x 36
3
x 5
x 6
x 6-1/2
x 8
x 10
x 12
x 14
x 16
x 18
x 20
x 25
x 27-1/2
3-1/2
x 10
x 12
x 14
x 16
x 25
x 27-1/2
4
x 6
x 7
x 8
x 10
x 12
x 14
x 16
x 18
x 20
x 24
x 25
x 27-1/2
4-1/4
x 5-1/4
4-1/2
x 8
x 10
x 12
x 14
x 16
x 18
x 28
5
x 6
x 8
x 10
x 12
x 14
x 16
x 18
x 20
x 22
x 25
x 28
x 36
5-1/2
x 16
x 40
6
x 9
x 12
x 14
x 16
x 18
x 20
x 22
x 25
x 26
x 28
x 30
x 32
x 34
x 36
x 40
7
x 12
x 14
x 16
x 18
x 20
x 22
x 25
x 26
x 28
x 30
x 36
x 40
8
x 10
x 12
x 16
x 18
x 20
x 22
x 25
x 28
x 30
x 32
x 34
x 36
x 40
9
x 20
x 22
x 25
x 26
x 30
x 34
x 36
x 38
x 40
x 45
10
x 12
x 14
x 20
x 22
x 23
x 25
x 26
x 28
x 30
x 32
x 36
x 38
x 40
x 48
x 60
11
x 25
x 30
x 32
x 34
x 36
x 40
x 48
x 60
12
x 20
x 25
x 26
x 30
x 32
x 34
x 36
x 38
x 40
x 48
x 60
14
x 23
x 25
x 30
x 32
x 34
x 36
x 38
x 40
x 48
x 60
15
x 23
x 25
x 30
x 40
x 48
x 60
16
x 20
x 40
x 48
x 60
17
x 48
18
x 23
x 24
x 40
x 48
x 60
20
x 22
x 24
x 34
x 40
x 48
x 60
22
x 24
x 48
23
x 48
24
x 48

Ameralloy Steel Corporation is a prime supplier of speciality steel bar products and wear-resistant high-impact steel plate. Our full catalogue features speciality steels and standard AISI alloys to meet your demanding applications.

Ameralloy’s precision-forged speciality steels and standard alloys are shipped worldwide with reliable on-time service.

Ameralloy provides engineering services for your steel products. From forging to machining and finishing, our Chicago based steel service centre will manufacture, ship, and deliver your order with unrivalled quality and service

Contact

Tap or Call: +1 (800) 237-0113

Email Project Specification: sales@ameralloy.com