Latrobe LSS™ H13 PQ Hot Work Tool Steel

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Latrobe LSS™ H13 PQ Hot Work Tool Steel
Categories:	Metal; Ferrous Metal; Alloy Steel; Tool Steel; Hot Work Steel
Material Notes:	TLS H13 PQ 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. TLS H13 PQ is melted using an electric-arc furnace, is 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. Information Provided by Timken Latrobe Steel. Timken sold Latrobe in December 2006. They are now Latrobe Specialty Steels Co.
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Physical Properties	Original Value	Comments

Specific Gravity	7.75 g/cc
Density	0.280 lb/in³

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	50	Air Cooled from 982°C, 30 minutes
	52.5	Air Cooled from 1010°C, 30 minutes
	54	Air Cooled from 1032°C, 30 minutes
Modulus of Elasticity	30000 ksi
	23000 ksi @Temperature 538 °C
	27000 ksi @Temperature 204 °C
Machinability	65 - 70 %	1% Carbon Steel
Charpy Impact	10.0 ft-lb	V-Notch; Air Cooled from 1024°C; 535°C Temper Temperature
	24.0 ft-lb	V-Notch; Air Cooled from 1024°C; 640°C Temper Temperature
	26.0 ft-lb	V-Notch; Air Cooled from 1024°C; 260°C Temper Temperature

Thermal Properties	Original Value	Comments
CTE, linear	11.3 µm/m-°C @Temperature 21.0 - 204 °C
	13.5 µm/m-°C @Temperature 21.0 - 538 °C
Thermal Conductivity	17.6 W/m-K @Temperature 27.0 °C
	23.4 W/m-K @Temperature 204 °C
	26.8 W/m-K @Temperature 649 °C

Processing Properties	Original Value	Comments
Processing Temperature	802 °C	Critical Temperaure Ar1
	826 °C	Critical Temperaure Ar3
	840 °C	Critical Temperaure Ac1
	890 °C	Critical Temperaure Ac3

Component Elements Properties	Original Value	Comments
Carbon, C	0.40 %
Chromium, Cr	5.25 %
Iron, Fe	90.599 %
Manganese, Mn	0.40 %
Molybdenum, Mo	1.35 %
Silicon, Si	1.0 %
Sulfur, S	0.0010 %
Vanadium, V	1.0 %

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NTIMK084 / 19431

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