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 |