| ASTM - American Society for Testing and Materials | AMS - Aerospace Material Specification |
| AISI - American Iron and Steel Institute | IC - Investment Casting Institute |
| MIL - Military Specification | SAE - Society of Automotive Engineers |
| ACI - Alloy Casting Institute | IN - International Nickel |
| QQ - Federal Specifications |
| Cast Tool Steels | ||||||||||||||
| Alloy | Specification | Carbon Min-Max | Manganese Min-Max | Silicon Min-Max | Chromium Min-Max | Molybdenum Min-Max | Tungsten Min-Max | Cobalt Min-Max | Phosphorous Min-Max | Sulfur Min-Max | Vanadium Min-Max | Iron | Optional | Melting Range 0F |
| A-2 | ASTM A-597 GR CA-2 | .95-1.05 | .75 | 1.50 | 4.75- 5.50 | .90- 1.40 | .03 | .03 | Bal. | V, .20-.50 | 2500-2600 | |||
| IC CA-2 | .95-1.05 | .75 | 1.50 | 4.75- 5.50 | .90- 1.40 | .025 | .025 | Bal. | V, .20-.50 | 2500-2600 | ||||
| A-6 | IC CA-6 | .65- .75 | 1.80-2.20 | 1.00 | .80- 1.20 | .80- 1.30 | .025 | .025 | Bal. | 2500-2600 | ||||
| D-2 | ASTM A-597 GR CD-2 | 1.40-1.60 | 1.00 | 1.50 | 11.00-13.00 | .70- 1.20 | .03 | .03 | Bal. | V, .40-1.00 Co, .70-1.00 |
2500-2600 | |||
| IC CD-2 | 1.40-1.60 | 1.00 | 1.50 | 11.00-13.00 | .70- 1.20 | .025 | .025 | Bal. | V, .40-1.00 | 2500-2600 | ||||
| D-3 | IC CD-3 | 2.10-2.30 | .75 | 1.00 | 11.50-13.00 | .40 | .025 | .025 | Bal. | 2500-2600 | ||||
| D-5 | ASTM A-597 CD-5 | 1.35-1.60 | .75 | 1.50 | 11.00-13.00 | .70- 1.20 | 2.50-3.50 | .03 | .03 | .35- .55 | Bal. | Ni, .40-.60 | 2500-2600 | |
| D-6 | IC CD-6 | 2.10-2.35 | .75 | .80-1.20 | 11.50-13.00 | .40 | .80-1.20 | .025 | .025 | Bal. | 2500-2600 | |||
| D-7 | IC CD-7 | 2.15-2.45 | .75 | 1.00 | 11.50-13.00 | .80- 1.20 | .025 | .025 | 3.50-4.50 | Bal. | 2500-2600 | |||
| H-11 | IC CH-11 | .30- .40 | .75 | .95-1.15 | 4.60- 5.40 | 1.20- 1.60 | .025 | .025 | .30- .50 | Bal. | 2500-2600 | |||
| H-12 | ASTM A-597 GR CH-12 | .30- .40 | .75 | 1.50 | 4.75- 5.75 | 1.25- 1.75 | 1.00-1.70 | .03 | .03 | .20- .50 | Bal. | 2500-2600 | ||
| IC CH-12 | .30- .40 | .75 | 1.50 | 4.75- 5.75 | 1.25- 1.75 | 1.00-1.70 | .025 | .025 | .20- .50 | Bal. | 2500-2600 | |||
| H-13 | ASTM A-597 GR CH-13 | .30- .42 | .75 | 1.50 | 4.75- 5.75 | 1.25- 1.75 | .03 | .03 | .75-1.20 | Bal. | 2500-2600 | |||
| IC CH-13 | .30- .42 | .75 | 1.50 | 4.75- 5.75 | 1.25- 1.75 | .025 | .025 | .75-1.20 | Bal. | 2500-2600 | ||||
| L-6 | IC CL-6 | .65- .75 | .75 | 1.00 | .80- 1.00 | .025 | .025 | Bal. | Ni, 1.50-1.90 Required | 2500-2600 | ||||
| M-2 | ASTM A-597 GR CM-2 | .78- .88 | .75 | 1.00 | 3.75- 4.50 | 4.50- 5.50 | 5.50-6.75 | .25 | .03 | .03 | 1.25-2.20 | Bal. | Ni, .25 Max. | 2500-2600 |
| IC CM-2 | .78- .88 | .75 | 1.00 | 3.75- 4.50 | 4.50- 5.50 | 5.50-6.75 | .025 | .025 | 1.25-2.20 | Bal. | Ni, .25 Max. | 2500-2600 | ||
| IC C1-M-2 | .95-1.05 | .75 | 1.00 | 3.75- 4.50 | 4.50- 5.50 | 5.50-6.75 | .025 | .025 | 1.75-2.20 | Bal. | Ni, .25 Max. | 2500-2600 | ||
| M-4 | IC CM-4 | 1.25-1.35 | .75 | 1.00 | 3.75- 4.50 | 4.50- 5.50 | 5.20-6.20 | .025 | .025 | 3.60-4.40 | Bal. | 2500-2600 | ||
| M-42 | IC CM-42 | 1.00-1.20 | .75 | 1.00 | 3.50- 4.25 | 9.00-10.00 | 1.25-1.75 | 7.50-8.50 | .025 | .025 | .95-1.35 | Bal. | 2500-2600 | |
| M-43 | IC CM-43 | 1.15-1.35 | .75 | 1.00 | 3.50- 4.25 | 8.25- 9.25 | 1.50-2.00 | 7.75-8.75 | .025 | .025 | 1.50-2.00 | Bal. | 2500-2600 | |
| 0-1 | ASTM A-597 GR CO-1 | .85-1.00 | 1.00-1.30 | 1.50 | .40- 1.00 | .40- .60 | .03 | .03 | .30 | Bal. | 2500-2600 | |||
| IC CO-1 | .85-1.00 | 1.00-1.30 | 1.50 | .40- 1.00 | .40- .60 | .025 | .025 | .30 | Bal. | 2500-2600 | ||||
| 0-2 | IC CO-2 | .85- .95 | 1.50-1.80 | 1.00 | .40 | .30 | .025 | .025 | .30 | Bal. | 2500-2600 | |||
| 0-7 | IC CO-7 | 1.10-1.20 | .75 | 1.00 | .50- .70 | 1.65-1.85 | .025 | .025 | .15- .25 | Bal. | 2500-2600 | |||
| S-1 | IC CS-1 | .45- .55 | .75 | 1.00 | 1.35- 1.65 | 2.35-2.65 | .025 | .025 | Bal. | 2450-2550 | ||||
| S-2 | IC CS-2 | .45- .55 | .75 | .90-1.20 | .40- .60 | .025 | .025 | .30 | Bal. | 2450-2550 | ||||
| S-4 | IC CS-4 | .50- .60 | .70- .90 | 1.80-2.20 | .30 | .025 | .025 | .30 | Bal. | 2450-2550 | ||||
| S-5 | ASTM A-597 GR CS-5 | .50- .65 | .60-1.00 | 1.75-2.25 | .35 | .20- .80 | .03 | .03 | .35 | Bal. | 2450-2550 | |||
| IC CS-5 | .50- .65 | .60-1.00 | 1.75-2.25 | .35 | .20- .80 | .025 | .025 | .35 | Bal. | 2450-2550 | ||||
| S-7 | ASTM A-597 GR CS-7 | .45- .55 | .40- .80 | .60-1.00 | 3.00-3.50 | 1.20-1.60 | .03 | .03 | Bal. | 2450-2550 | ||||
| IC CS-7 | .50- .60 | .50- .80 | 1.00 | 3.00-3.50 | 1.20-1.60 | .025 | .025 | Bal. | 2450-2550 | |||||
| T-1 | IC CT-1 | .65- .75 | .75 | 1.00 | 3.75-4.50 | 17.25-18.75 | .025 | .025 | .90-1.30 | Bal. | 2600-2675 | |||
| T-2 | IC CT-2 | .80- .90 | .75 | 1.00 | 3.75-4.50 | 1.00 | 17.50-19.00 | .025 | .025 | 1.80-2.40 | Bal. | 2600-2675 | ||
| T-6 | IC CT-6 | .75- .85 | .75 | 1.00 | 4.00-4.75 | .70-1.00 | 18.50-21.25 | 10.00-13.70 | .025 | .025 | 1.50-2.10 | Bal. | 2600-2675 | |