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| INVESTMENT CASTING |
 Introduction |
| Process |
| FAQs |
| Job Handling Capacity |
| Metals / Material |
| Ferrous |
| Non-Ferrous |
| Tolerance |
| Quality Tolerance |
| General Tolerances |
| Flatness |
| Straightness |
| Concentricity |
| Roundness |
| Angles |
| Hole Positioning |
| Blind Holes |
| Parallel Sections |
| Wall Thickness |
| Round Hollow Tubing |
| Surface Finish |
STANDARD STAINLESS STEEL CASTING ALLOYS
| Typical Casting Compositions
of Corrosion-Resistant Stainless Steel Casting Alloys |
||||||||||
| ALLOY CASTING INSTITUTE DESIGNATION |
ALLOY TYPE |
NEAREST AISI TYPE | ASTM SPECIFI- CATION |
CHEMICAL COMPOSITION |
OTHER ELEMENTS | |||||
| NI | CR | C MAX. | MN MAX. | SI MAX. | MO MAX. | |||||
| CA-15 | 12CR | 410 | A-296 | 1 | 11.5- 14 |
.15 | 1.00 | 1.50 | 0.5 | |
| CA-40 | 12CR | 420 | 1 | 11.5- 14 |
.20-.40 | 1.00 | 1.50 | 0.5 | ||
| CB-30 | 20CR | 431 | A-296 | 2 | 18- 22 |
.30 | 1.00 | 1.50 | ||
| CC-50 | 28CR | 446 | A-296 | 4 | 26- 30 |
.50 | 1.00 | 1.50 | ||
| CD-4MCu | 26CR- 5NI |
4.75- 6.00 |
25- 27 |
.04 | 1.00 | 1.50 | 1.75- 2.25 |
CU 2.75- 3.25 |
||
| CE-30 | 29CR- 9NI |
A-296 | 8-11 | 26- 30 |
.30 | 1.50 | 2.00 | |||
| CF-3 | 19CR- 10NI |
304L | 8-12 | 17- 21 |
.03 | 1.50 | 2.00 | |||
| CF-8 | 19CR- 9NI |
304 | A-296 | 8-11 | 18- 21 |
.08 | 1.50 | 2.00 | ||
| CF-20 | 19CR- 9NI |
302 | A-296 | 8-11 | 18- 21 |
.20 | 1.50 | 2.00 | ||
| CF-3M | 19CR- 10NI |
316L | 9-13 | 17- 21 |
.03 | 1.50 | 1.50 | 2-3 | ||
| CF-8M | 19CR- 10NI |
316 | A-296 | 9-12 | 18- 21 |
.08 | 1.50 | 1.50 | 2-3 | |
| CF-12M | 19CR- 10NI |
316 | 9-12 | 18- 21 |
.12 | 1.50 | 1.50 | 2-3 | ||
| CF-8C | 19CR- 10NI |
317 | A-296 | 9-12 | 18- 21 |
.08 | 1.50 | 2.00 | *See Below | |
| CF-16F | 19CR- 10NI |
303 | A-296 | 9-12 | 18- 21 |
.16 | 1.50 | 2.00 | 1.5 | **See Below |
| CG-18M | 19CR- 10NI |
317 | 9-13 | 18- 21 |
.08 | 1.50 | 1.50 | 3-4 | ||
| CH-20 | 25CR- 12NI |
309 | A-296 | 12-15 | 22- 26 |
.20 | 1.50 | 2.00 | ||
| CK-20 | 25CR- 20NI |
310 | A-296 | 19-22 | 23- 27 |
.20 | 1.50 | 2.00 | ||
| CN-7M | 20CR- 29NI |
27-31 | 18- 22 |
.07 | 1.50 | 1.50 | 1.75- 2.50 |
CU 3.00 Min. | ||
CF-8C * Cb (8 x C Min.) 1.0 Max. or Cb + Ta 10 x C Min. 1.35 Max.
CF-16 ** Se 0.20-0.35 P 0.17 Max.
| Typical Casting Compositions
of Heat-Resistant Stainless Steel Casting Alloys |
|||||||||
| ALLOY CASTING INSTITUTE DESIGNATION |
ALLOY TYPE |
ASTM SPECIFICATION |
NEAREST AISI TYPE |
CHEMICAL COMPOSITION |
|||||
| NI | CR | C MAX. | MN MAX. | SI MAX. | MO MAX. | ||||
| HA | 8-10 CR | 8-10 | .20 | .35-.65 | 1.00 | .90-1.2 | |||
| HC | 28 CR | A-297 | 446 | 4 Max. | 26-30 | .50 | 1.00 | 2.00 | 0.5 |
| HD | 28 CR-6NI | 327 | 4-7 | 26-30 | .50 | 1.50 | 2.00 | 0.5 | |
| HE | 28 CR-9NI | A-297 | 312 | 8-11 | 26-30 | .20-.50 | 2.00 | 2.00 | 0.5 |
| HF | 19 CR-9NI | A-297 | 302B | 9-12 | 19-23 | .20-.40 | 2.00 | 2.00 | 0.5 |
| HH | 25 CR-12NI | A-297 | 309 | 11-14 | 24-28 | .20-.50 | 2.00 | 2.00 | 0.5 |
| HI | 28 CR-15NI | 14-18 | 26-30 | .20-.50 | 2.00 | 2.00 | 0.5 | ||
| HK | 28 CR-20NI | A-297 | 310 | 18-22 | 24-28 | .20-.60 | 2.00 | 2.00 | 0.5 |
| HL | 30 CR-20NI | 18-22 | 28-32 | .20-.60 | 2.00 | 2.00 | 0.5 | ||
| HN | 25 NI-20CR | A-297 | 311 | 23-27 | 19-23 | .20-.50 | 2.00 | 2.00 | 0.5 |
| HT | 35 NI-15CR | A-297 | 330 | 33-37 | 13-17 | .35-.75 | 2.00 | 2.50 | 0.5 |
| HU | 39 NI-19CR | A-297 | 330 | 37-41 | 17-21 | .35-.75 | 2.00 | 2.50 | 0.5 |
| HW | 60 NI-12CR | 58-62 | 10-14 | .35-.75 | 2.00 | 2.50 | 0.5 | ||
| HX | 66NI-17CR | 64-68 | 15-19 | .35-.75 | 2.00 | 2.50 | 0.5 | ||
