1. Conducted by the Die Materials Specification Subcommittee October 16th & 17th, 2007 Die Materials Specification Task Group Die Steel Quality & Heat Treatment Acceptance Criteria

2. Die Materials Specification Task Group #207-2006

3. Die Materials Specification Task Group Lo Cr, Hi Mo Carpenter Pyrotough 78 0.401.450.005 max1.004.452.100.80

4. Die Materials Specification Task Group

6. Lo Cr, Hi Mo Carpenter Pyrotough 78 0.401.450.005 max1.004.452.100.80

7. Die Materials Specification Task Group Lo Cr, Hi Mo Carpenter Pyrotough 78 0.401.450.005 max1.004.452.100.80

8. Die Materials Specification Task Group

12. Lo Cr, Hi Mo Carpenter Pyrotough 78 0.401.450.005 max1.004.452.100.80

13. Die Materials Specification Task Group Lo Cr, Hi Mo Carpenter Pyrotough 78 0.401.450.005 max1.004.452.100.80

14. Die Materials Specification Task Group Lo Cr, Hi Mo Carpenter Pyrotough 78 0.401.450.005 max1.004.452.100.80

15. Die Materials Specification Task Group Possible NADCA Sponsored Projects: Impact toughness & thermal fatigue resistance of the new grades listed in #207-2006 Project 161: Thermal Fatigue Resistance of High Performance Die Steels Project Description: The objective is to provide the Die Materials Specifications and Heat Treating Task Force with detailed thermal fatigue and Charpy V-notch behavior of the advanced die steels that are included in NADCA 207-2006. Whereas data was provided by the suppliers of the steels, more testing of these steels is needed to strengthen the Specification and promote implementation by the die casting industry. 8 thermal fatigue samples and 80 CVN samples will be machined from select steels (two TF and ten Charpy samples per steel type) and quenched according to the specification. The as-quenched and the tempered microstructures will be determined. The thermal fatigue resistance of the eight specimens and the Charpy V-notch impact strength will be evaluated. $25K

16. Die Materials Specification Task Group Possible NADCA Sponsored Projects: Comparative study of heat checking resistance between Premium Grade H13 with lower bainitic and martensitic structures Project 160: A COMPARATIVE STUDY OF HEAT CHECKING RESISTANCE BETWEEN P.G. H13 STEEL WITH LOWER BAINITIC AND MARTENSITIC STRUCTURES Project Description: Eight H13 immersion thermal fatigue specimens quenched then dunk tested: Oil quenched to 150F Cooled rapidly in a 5 bar vacuum furnace to 150F Cooled rapidly in a 5 bar vacuum furnace to 650F, held for five hours and cooled to 150F Vacuum quenched in a 5 bar furnace to 590F, held for five hours and cooled to 150F. As-quenched and double tempered microstructures will be determined. The differences in the thermal fatigue resulting from the isothermal hold temperatures during quenching will provide a range of microstructures to determine the effect on thermal fatigue behavior to show the relationship between the different types of heat treatments, microstructures and their effect on thermal fatigue behavior. $25K

17. Die Materials Specification Task Group Possible NADCA Sponsored Projects: Capability impact toughness of advanced die steels at oil quenched at tempered hardness “other than” 44/46HRC ~$50K - $100K Commercially hardened impact toughness of advanced die steels at hardness “other than” 44/46HRC ~$25K Optimization of the tempering time/temperature process $ ?