Ko te maitai Saky Ko te maitai kowiri tira martensitic he momo maitai kowiri tira chromium e pupuri ana i te hanganga moroiti martensitic i te pāmahana rūma, ā, ka taea te whakarite i ōna āhuatanga mā te maimoatanga wera (te tinei me te whakamahana). I te nuinga o te wā, he momo maitai kowiri tira ka taea te whakapakeke. Whai muri i te tukanga tinei, te whakamahana me te whakamahana, kua tino pai ake te pakeke o te maitai kowiri tira 440 i ērā atu maitai kowiri tira me te ātete wera. He mea noa te whakamahi i roto i te hanga peera, taputapu tapahi, pokepoke kirihou rānei e hiahia ana ki ngā kawenga teitei me te ātete kakahu i raro i ngā āhuatanga waikura. Ko te maitai kowiri tira raupapa 440 paerewa Amerika ko: 440A, 440B, 440C, 440F. Ka piki haere te ihirangi waro o te 440A, 440B me te 440C. Ko te 440F (ASTM A582) he momo maitai tapahi kore utu me te ihirangi S i tāpirihia i runga i te kaupapa o te 440C.
Ngā Tohu ōrite o te 440 SS
| Amerika | ASTM | 440A | 440B | 440C | 440F |
| UNS | S44002 | S44003 | S44004 | S44020 | |
| Hapanihi | JIS | SUS 440A | SUS 440B | SUS 440C | SUS 440F |
| Tiamana | DIN | 1.4109 | 1.4122 | 1.4125 | / |
| Haina | GB | 7Cr17 | 8Cr17 | 11Cr17 9Cr18Mo | Y11Cr17 |
Te Hanganga Matū o te 440 SS
| Ngā māka | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 440A | 0.6-0.75 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440B | 0.75-0.95 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440C | 0.95-1.2 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440F | 0.95-1.2 | ≤1.00 | ≤1.25 | ≤0.06 | ≥0.15 | 16.0-18.0 | / | (≤0.6) | (≤0.5) |
Kia mōhio: e whakaaetia ana ngā uara i roto i ngā pūwero, ā, kāore e hiahiatia ana.
Te pakeke o te 440 SS
| Ngā māka | Te pakeketanga, te whakamahana (HB) | Te maimoatanga wera (HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
He rite ki te maitai koranu noa, ko te maitai kowiri tira Martensite raupapa 440 o Saky he āhuatanga o te whakapakeke mā te tinei, ā, ka taea te whiwhi i te whānuitanga o ngā āhuatanga miihini mā te maimoatanga wera rerekē. I te nuinga o te wā, he pai te mahi whakapakeke a te 440A me te pakeke teitei, ā, he teitei ake tōna pakari i te 440B me te 440C. He nui ake te pakeke me te pakari o te 440B i te 440A me te 440C mō ngā taputapu tapahi, ngā taputapu ine, ngā peera me ngā takirere. Ko te 440C te mea tino pakari o ngā maitai kore waikura katoa me ngā maitai ātete wera mō ngā taputapu tapahi kounga teitei, ngā pūwero me ngā peera. He maitai tapahi kore utu te 440F, ā, e whakamahia ana i roto i ngā mīhini hurihuri aunoa.
Wā tuku: Hōngongoi-07-2020