Pae papatahi kowiri tira 440CHe hua maitai kore waikura kounga teitei tēnei e mōhiotia ana mō tōna huinga tino pai o te ātete ki te kakahu me te ātete ki te waikura. Nō te whānau maitai kore waikura martensitic tēnei, ā, e whakamahia whānuitia ana i roto i ngā momo ahumahi mō tōna mahi tino pai.
Paerewa o te Kowiri tira 440C me ngā karaehe maitai ōrite
| Whenua | USA | BS & DIN | Hapani |
| Paerewa | ASTM A276 | EN 10088 | JIS G4303 |
| Ngā māka | S44004/440C | X105CrMo17/1.4125 | SUS440C |
Te Hanganga Matū o te Rino ASTM A276 440C me ngā Mea ōrite
| Paerewa | Tau | C | Mn | P | S | Si | Cr | Mo |
| ASTM A276 | S44004/440C | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | ≦0.75 |
| EN10088 | X105CrMo17/1.4125 | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | 0.40-0.80 |
| JIS G4303 | SUS 440C | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | ≦0.75 |
440C Kowiri tiraMīhiniNgā Āhuatanga
| Te Pāmahana Whakamātao (°C) | Kaha Kume (MPa) | Kaha Hua 0.2% Whakamātautau (MPa) | Te roa (% i roto i te 50mm) | Te Pakari o Rockwell (HRC) | Pānga Charpy V (J) |
| Kua whakawerahia* | 758 | 448 | 14 | 269HB mōrahi# | - |
| 204 | 2030 | 1900 | 4 | 59 | 9 |
| 260 | 1960 | 1830 | 4 | 57 | 9 |
| 306 | 1860 | 1740 | 4 | 56 | 9 |
| 371 | 1790 | 1660 | 4 | 56 | 9 |
Anei ētahi o ngā kōrero matua hei whakauru i te pae papatahi kowiri tira 440C:
1. Te Hanganga: Ko te pae papatahi kowiri tira 440C he mea hanga tuatahi ki te chromium (16-18%), te waro (0.95-1.20%), me ētahi atu huānga iti pēnei i te manganese, te silicon, me te molybdenum.
2. Ātete Paku: He mea rongonui te pae papatahi kowiri tira 440C mō tōna ātete pakū tino pai, ā, he pai mō ngā tono e pā ana ki ngā rauemi whakakoi, ngā taputapu tapahi, ngā peera, me ngā wāhanga ātete pakū.
3. Ātete ki te Waikura: Ahakoa he maitai kore waikura waro-teitei, he pai te ātete o te 440C ki te waikura.
4. Pakari me te Kaha: He tino pakari, he tino kaha hoki te pae papatahi kowiri tira 440C, e whakarato ana i te pakari me te roa o te wā e whakamahia ana i roto i ngā tono uaua.
Wā tuku: Hōngongoi-05-2023