1. Conducted by the Die Materials Specification Subcommittee February 12th & 13th, 2008 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 Lo Cr, Hi Mo Carpenter Pyrotough 78 0.401.450.005 max1.004.452.100.80

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

6. 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

7. 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

8. Die Materials Specification Task Group 2 Thermal Fatigue samples after vac quench & triple temper 44/46 HRC 5 CVN samples after oil quench & triple temper to 44/46 HRC 5 CVN samples after vac quench & triple temper to 44/46 HRC 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.

9. Die Materials Specification Task Group 2 Thermal Fatigue samples after vac quench & triple temper 44/46 HRC 5 CVN samples after oil quench & triple temper to 44/46 HRC 5 CVN samples after vac quench & triple temper to 44/46 HRC Grade C1850:Uddeholm Dievar Grade C1885:Thyssen 2367 Grade E1885:Ellwood Tuf-Die Grade E1885:Aubert & Duval ADC3 Backup: Grade E1850:Thyssen E38K Minimum size requirements: 8” thick x 8” wide x 6” long Minimum parent block size: 12”thick x 10”wide 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.

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

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

12. Die Materials Specification Task Group Possible NADCA Sponsored Projects: L. Impact Toughness A coupon approximately 2½” x 4½” x ½” thick shall be prepared from a sample preferably from the same Grade/block of Special Qual­ity die steel of known “annealed capability” impact toughness such that the 2½” dimension represents the thickness direction, the 4½” dimension represents width direction, and the ½” dimension represents the length direction of the parent material. The coupon shall be attached to each workpiece away from edges and corners such that a 2½” x 4½” face of the coupon is in intimate contact with the workpiece. If tack welds are used, the welds should be placed along the 4½” dimension. The coupon shall accompany the workpiece through the preheating, austenitizing, quenching, and first temper of the hardening procedure. Test coupon must be tempered to 44/46 HRC. NOTE: If a final hardness other than 44/46 HRC has been specified, the coupon may be removed from the die after the first temper and then separately tempered to 44/46 HRC.

13. Die Materials Specification Task Group Possible NADCA Sponsored Projects: L. Impact Toughness A coupon approximately 2½” x 4½” x ½” thick shall be prepared from a sample preferably from the same Grade/block of Special Qual­ity die steel of known “annealed capability” impact toughness such that the 2½” dimension represents the thickness direction, the 4½” dimension represents width direction, and the ½” dimension represents the length direction of the parent material. The coupon shall be attached to each workpiece away from edges and corners such that a 2½” x 4½” face of the coupon is in intimate contact with the workpiece. If tack welds are used, the welds should be placed along the 4½” dimension. The coupon shall accompany the workpiece through the preheating, austenitizing, quenching, and first temper of the hardening procedure. Test coupon must be tempered to 44/46 HRC. NOTE: If a final hardness other than 44/46 HRC has been specified, the coupon may be removed from the die after the first temper and then separately tempered to 44/46 HRC.

14. Die Materials Specification Task Group Possible NADCA Sponsored Projects: Capability impact toughness of advanced die steels at oil quenched and 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 $ ? Cryogenic Treatment of Die Steels $ ?