Schmolz + Bickenbach P-20 Modified Plastic Mold Steel

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Schmolz + Bickenbach P-20 Modified Plastic Mold Steel
Categories:	Metal; Ferrous Metal; Tool Steel; Mold Steel
Material Notes:	Description: P-20 Modified is an improved pre-hardened mold steel that has been specially designed for large plastic molds; The material is forged on a 5000 ton press assuring maximum deformation during the forging process; Hardness loss in large cross sections is minimal Characteristics: Good polishability; Good compressive strength; Minimum hardness loss in large cross section Applications: Injection molds, Compression molds, Mold frame, Forming tools and Die holder Stress Relieving (Heat Treatment): 850°F-900°F hold 1 hr/in; Cooling: Air cool; Note: Large cross sections require accurate control of temperatures and times Information provided by Schmolz + Bickenbach
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Physical Properties	Original Value	Comments

Density	0.284 lb/in³

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	33 @Treatment Temp. 621 °C, Time 7200 sec
	35 @Treatment Temp. 593 °C, Time 7200 sec
	40 @Treatment Temp. 566 °C, Time 7200 sec
	43 @Treatment Temp. 538 °C, Time 7200 sec
	47 @Treatment Temp. 482 °C, Time 7200 sec
	50 @Treatment Temp. 427 °C, Time 7200 sec
	51 @Treatment Temp. 371 °C, Time 7200 sec
Tensile Strength	150 ksi @Temperature -5.56 °C	Hardened and tempered to 34 HRC
Tensile Strength, Yield	130 ksi @Temperature 22.0 °C	Hardened and tempered to 34 HRC
Elongation at Yield	15 % @Temperature 22.0 °C	Hardened and tempered to 34 HRC
Reduction of Area	35 % @Temperature 22.0 °C	Hardened and tempered to 34 HRC

Thermal Properties	Original Value	Comments
CTE, linear	6.80 µin/in-°F @Temperature 21.1 - 93.3 °C
	7.00 µin/in-°F @Temperature 21.1 - 204 °C
	7.10 µin/in-°F @Temperature 21.1 - 302 °C
Thermal Conductivity	202 BTU-in/hr-ft²-°F @Temperature 21.1 °C
	209 BTU-in/hr-ft²-°F @Temperature 204 °C
	216 BTU-in/hr-ft²-°F @Temperature 427 °C

Component Elements Properties	Original Value	Comments
Carbon, C	0.34 %
Chromium, Cr	1.75 %
Iron, Fe	96.31 %
Manganese, Mn	0.80 %
Molybdenum, Mo	0.40 %
Silicon, Si	0.40 %

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NSCHMO004 / 125877

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