Conducted by the Die Materials Specification Subcommittee February 12th & 13th, 2008 Die Materials Specification Task Group Die Steel Quality & Heat Treatment

Conducted by the

Die Materials SpecificationSubcommittee

February 12th & 13th, 2008

Die Materials Specification Task GroupDie Materials Specification Task Group

Die Steel Quality & Heat Treatment Acceptance Criteria


#207-2006


NADCA Material CategoryGrade C Mn P S Si Cr Mo V

"Grade A" Type H13 - Premium0.37 - 0.42

0.20 - 0.50

0.025 max

0.005 max

0.80 - 1.20

5.00 - 5.50

1.20 - 1.75

0.80 - 1.20

"Grade B" Type H13 - Superior0.37 - 0.42

0.20 - 0.50

0.015 max

0.003 max

0.80 - 1.20

5.00 - 5.50

1.20 - 1.75

0.80 - 1.00

"Grade C" Type 2367 & Modified0.32 - 0.40

0.10 - 0.60

0.020 max

0.003 max

0.10 - 0.50

4.70 - 5.30

2.00 - 3.30

0.40 - 0.70

"Grade D" Type H11 / 23430.35 - 0.42

0.20 - 0.60

0.025 max

0.003 max

0.80 - 1.20

5.00 - 5.50

1.10 - 1.60

0.30 - 0.60

"Grade E" Type H11 Modified0.32 - 0.43

0.10 - 0.70

0.020 max

0.003 max

0.10 - 0.55

4.70 - 5.70

1.10 - 2.10

0.30 - 0.80

TABLE 1 - Chemical Composition of Special Quality Die Steels


NADCA Grade

Tradename Type Preheating Temp, °F (°C)Hardening Temp,

°F (°C)

A Type H13 - Premium A18851100-1250 (595-675) 1500-1560 (815-850)

1885 (1030)

B Type H13 - Superior B18851100-1250 (595-675) 1500-1560 (815-850)

1885 (1030)

C Type 2367 & Modified

Uddeholm Dievar C18501100-1200 (595-650) 1500-1560 (815-850)

1850 (1010)

Böhler W403 VMR C1885930-1020 (500-550) 1375-1475 (745-800)

1885 (1030)

Ellwood ExELL Hot Die C18851100-1200 (595-650) 1475-1525 (800-830)

1885 (1030)

Kind RPU C18851100-1200 (595-650) 1500-1560 (815-850)

1885 (1030)

Thyrotherm 2367 C18851100-1200 (595-650) 1500-1560 (815-850)

1885 (1030)

D Type H11 / 2343

Bohler W300 Isobloc D18301100-1200 (595-650) 1500-1560 (815-850)

1830 (1000)

Thyrotherm 2343 Supra D18301100-1200 (595-650) 1500-1560 (815-850)

1830 (1000)

Uddeholm Vidar Supreme

D18301100-1200 (595-650) 1500-1560 (815-850)

1830 (1000)

Cross Reference Guide to Special Quality Die Steels


NADCA Grade


°F (°C)

E Type H11 Modified

Bohler W400 VMR E1810930-1020 (500-550) 1375-1475 (745-800)

1810 (990)

Uddeholm Vidar Superior E18251100-1200 (595-650) 1500-1560 (815-850)

1825 (995)

Kind TQ-1 E18501100-1200 (595-650) 1500-1560 (815-850)

1850 (1010)

Thyrotherm E38K E18501100-1200 (595-650) 1500-1560 (815-850)

1850 (1010)

Aubert & Duval ADC3 E1885 1375-1425 (745-775) 1885 (1030)

Dunn DSS#3 E1885 1275-1325 (690-720) 1885 (1030)

Ellwood ExELL Tuf-Die E18851100-1200 (595-650) 1450-1500 (790-815)

1885 (1030)

Nippon Koshuha KDA-1 E18851100-1200 (595-650) 1475-1525 (800-830)

1885 (1030)



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



• 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.


$25K


• 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



• 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



NADCA Grade


°F (°C)

A Type H13 - Premium A18851100-1250 (595-675) 1500-1560 (815-850)

1885 (1030)

B Type H13 - Superior B18851100-1250 (595-675) 1500-1560 (815-850)

1885 (1030)

C Type 2367 & Modified

Uddeholm Dievar C18501100-1200 (595-650) 1500-1560 (815-850)

1850 (1010)

Böhler W403 VMR C1885930-1020 (500-550) 1375-1475 (745-800)

1885 (1030)

Ellwood ExELL Hot Die C18851100-1200 (595-650) 1475-1525 (800-830)

1885 (1030)

Kind RPU C18851100-1200 (595-650) 1500-1560 (815-850)

1885 (1030)

Thyrotherm 2367 C18851100-1200 (595-650) 1500-1560 (815-850)

1885 (1030)

D Type H11 / 2343

Bohler W300 Isobloc D18301100-1200 (595-650) 1500-1560 (815-850)

1830 (1000)

Thyrotherm 2343 Supra D18301100-1200 (595-650) 1500-1560 (815-850)

1830 (1000)

Uddeholm Vidar Supreme

D18301100-1200 (595-650) 1500-1560 (815-850)

1830 (1000)



NADCA Grade


°F (°C)

E Type H11 Modified

Bohler W400 VMR E1810930-1020 (500-550) 1375-1475 (745-800)

1810 (990)

Uddeholm Vidar Superior E18251100-1200 (595-650) 1500-1560 (815-850)

1825 (995)

Kind TQ-1 E18501100-1200 (595-650) 1500-1560 (815-850)

1850 (1010)

Thyrotherm E38K E18501100-1200 (595-650) 1500-1560 (815-850)

1850 (1010)

Aubert & Duval ADC3 E1885 1375-1425 (745-775) 1885 (1030)

Dunn DSS#3 E1885 1275-1325 (690-720) 1885 (1030)

Ellwood ExELL Tuf-Die E18851100-1200 (595-650) 1450-1500 (790-815)

1885 (1030)

Nippon Koshuha KDA-1 E18851100-1200 (595-650) 1475-1525 (800-830)

1885 (1030)


Die Materials Specification Task GroupDie Materials Specification Task GroupPossible 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 Qual ity 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.

Die Materials Specification Task GroupDie Materials Specification Task GroupPossible 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 Qual ity 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.



• 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 $ ?

Documents

Conducted by the Die Materials Specification Subcommittee February 12th & 13th, 2008 Die Materials Specification Task Group Die Steel Quality & Heat Treatment