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High Speed Steel
Hot Work Tool Steel
 
AISI H11
Category  Steel
Class  Tool steel
Type  Chromium hot work steel
Designations  France: AFNOR Z 38 CDV 5
Germany: DIN 1.2343
Italy: UNI KU
Japan: JIS SKD6
United Kingdom: B.S. BH 11
United States: AMS 6437 , AMS 6485 , AMS 6487 , AMS 6488 , ASTM A681 , FED QQ-T-570 , SAE J437 , SAE J438 , SAE J467 , UNS T20811

Composition
 
Element  Weight % 
C  0.33-0.43 
Mn  0.20-0.50 
Si  0.80-1.20 
Cr  4.75-5.50 
Ni  0.3 
Mo  1.10-1.60 
V  0.30-0.60 
Cu  0.25 
P  0.03 
S  0.03 

Mechanical Properties
 
Properties  Conditions 
T (°C) Treatment
Density (×1000 kg/m3)   7.75 25
Poisson's Ratio   0.27-0.30 25
Elastic Modulus (GPa)   190-210 25

Thermal Properties
Properties  Conditions 
T (°C) Treatment
Thermal Expansion (10-6/ºC)   11.9  20-100
Thermal Conductivity (W/m-K)   42.2  100

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