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General |
Properties |
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EDRO #17™ is Premium Quality H13 hot work steel that is designed to meet the highest quality standards in the die casting industry, and to excel in the most demanding hot work tooling applications. EDRO #17™ is melted melted using an electric-arc furnace, refined by the argon-oxygen-decarburization (AOD) process, and is further enhanced to aerospace quality levels using Vacuum-Arc or Electro-slag Remelting. These special melting practices along with special thermo-mechanical and annealing treatments result in ultra-high microcleanliness and a homogeneous, fine-grained microstructure.
EDRO #17™ exhibits outstanding impact toughness and resistance to thermal fatique cracking (heat checking), and will meet or exceed a wide variety of die casting industry specifications, including all of the requirements of NADCA 207-97.
EDRO #17™ provides the highest performance in typical applications such as inserts, cores, end cavities for die casting dies, die casting shot sleeves, hot forging dies, extrusion dies, and plastic mold cavities and components that require high toughness and excellent polishability.
| Typical analysis % |
C
0.40
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Mn
0.40
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S
0.001
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Si
1.00
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Cr
5.25
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Mo
1.35
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V
1.0
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| Standard spec. |
ASTM/ AISI H13 |
| Delivery condition |
Annealed |
| Color code |
Green with White Stripes |
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Density: 0.280 lb/in3 (7750 kg/m3)
Specific Gravity: 7.75
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| Modulus of Elasticity |
Temperature
°F
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Modulus
psi x 106
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Temperature
°C
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Modulus
GPa
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70
200
400
600
800
1000
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39.0
29.0
27.0
28.5
27.5
23.0
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21
93
204
316
427
538
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206.8
199.9
186.2
196.5
189.6
158.6
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| Thermal Conductivity |
Temperature
°F
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Btu
hr-ft-°F
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Temperature
°C
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W/
m-°C
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80
400
800
1200
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10.17
13.52
14.50
15.49
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27
204
427
649
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17.6
23.4
25.1
26.8
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| Coefficient of Thermal Expansion (at 47 to 48 HRC) |
Temperature
°F
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in/in/
°F x 10-6
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Temperature
°C
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mm/mm
°C x 10-6
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80-200
80-400
80-800
80-1200
80-1500
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5.8
6.3
6.9
7.3
7.5
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21-93
21-204
21-316
21-427
21-538
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10.4
11.3
12.4
13.1
13.5
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| Machinability: 65-70% of a 1% carbon steel |
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 EDRO #17™ exhibits outstanding impact toughness and will meet or exceed a wide variety of die casting industry specifications, including all of the requirements of NADCA 207-97.
The industry specifications typically permit the use of two types of tests to qualify the impact toughness of the steel to industry standard specifications.
One type of test is the Charpy V-Notch test. this test uses a notched specimen that is 10mm by 10mm in cross section. The other test uses an unnotched specimen that is 7mm by 10mm in cross section. This test method is sometimes referred to as the Volkswagen Test, but more commonly is referred to as the Unnotched or "7 by 10" impact test.
The test values obtained from the two different tests are very different in magnitude, and can be confusing. The chart shows the approximate relationship between the charpy V-Notch values on the bottom axis, and Unnotched test values on the left axis. As an example, to convert a value of 250 ft-lb from an Unnotched test, follow the horizontal line at the 250 value to where it intersects the sloped conversion line. Then drop vertically from the conversion line to the Charpy V-Notch value of approximately 13-1/4 ft-lb.
Note: always work in foot-pounds (ft-lb) when using the chart. If the test values are given in Joules (J), multiply the value in Joules by 0.737 to convert the value to ft-lb.
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