Focus On Maxival
"The state of the art of improved machinability steels."
EN 1.4306 (BS 304S15) MAXIVAL - EN 1.4404 (316S11) MAXIVAL
The basic idea behind MAXIVAL is the production of an austenitic stainless steel that instead of a high sulphur content and well distributed inclusions which:
- Break the chips on machining.
- Do not wear nor overheat tools.
- Do not weaken the metallic matrix.
- Do not create corrosion point.
Produced by Acciaierie Valbruna since the begninning of the Eighties and constantly improved, MAXIVAL is a stainless steel resistiant to corrosion and machanically as strong as the ordinary 304 and 316 but with a much superior machinability. The advantages offered to a machine shop working with MAXIVAL are:
- High cutting parameters-increased cycle times
(Speed, Feed and Depth) - Extended Tool Life
(Light ear and infrequent sharpening) - Good chip breaking
(Easy removal, low machine supervision)
See following comparative tables and diagrams.
MAXIVAL is a World Wide Valbruna Trade Mark
Comparative Table
| Grade | Condition | Hardness | Depth of Cut (mm) |
Speed of cut | Tool Insert | Cutting speed up to collapse of tool |
|
|---|---|---|---|---|---|---|---|
| HB | (mm) | (mm/rev) | (ISO) | without TiN mtrs/min. |
without TiN mtrs/min. |
||
| MAXIVAL 304 | annealed | 160 | 1.5 | 0.4 | P 35 | 175 | 135 |
| hardened | 200 | 1.5 | 0.4 | P 35 | 150 | 115 | |
| hardened | 240 | 1.5 | 0.4 | P 35 | 130 | 100 | |
| AISI 304 | annealed | 160 | 1.5 | 0.4 | P 35 | 140 | 110 |
| hardened | 200 | 1.5 | 0.4 | P 35 | 120 | 95 | |
| hardened | 240 | 1.5 | 0.4 | P 35 | 105 | 80 | |
| MAXIVAL 316 | annealed | 160 | 1.5 | 0.4 | P 35 | 145 | 110 |
| hardened | 200 | 1.5 | 0.4 | P 35 | 125 | 95 | |
| hardened | 240 | 1.5 | 0.4 | P 35 | 108 | 82 | |
| AISI 316 | annealed | 160 | 1.5 | 0.4 | P 35 | 115 | 90 |
| hardened | 200 | 1.5 | 0.4 | P 35 | 100 | 80 | |
| hardened | 240 | 1.5 | 0.4 | P 35 | 88 | 68 | |