Birta Saky Birta aan la taaban karin ee Martensitic waa nooc ka mid ah birta aan la taaban karin ee chromium kaas oo ilaaliya qaab-dhismeedka martensitic heerkulka qolka, kaas oo sifooyinkiisa lagu hagaajin karo daaweynta kulaylka (deminta iyo hagaajinta). Guud ahaan, waa nooc ka mid ah birta aan la adkeyn karin ee aan la taaban karin. Ka dib marka la damiyo, la hagaajiyo oo la nuugo, adkaanta birta aan la taaban karin ee 440 ayaa si weyn loo hagaajiyay marka loo eego birta kale ee aan la taaban karin iyo kuwa u adkaysta kulaylka. Waxaa si caadi ah loogu isticmaalaa soo saarista qalabka wax lagu gooyo, qalabka jarista, ama caaryada balaastikada ah ee u baahan culaysyo badan iyo iska caabin xirasho xaaladaha daxalka. Birta aan la taaban karin ee taxanaha 440 ee Mareykanka oo ay ku jiraan: 440A, 440B, 440C, 440F. Kaarboonka ku jira 440A, 440B iyo 440C ayaa si isdaba joog ah u kordhay. 440F (ASTM A582) waa nooc ka mid ah birta goynta xorta ah oo leh maaddada S oo lagu daray 440C.
Darajooyinka u dhigma ee 440 SS
| Mareykan ah | ASTM | 440A | 440B | 440C | 440F |
| Qaramada Midoobay | S44002 | S44003 | S44004 | S44020 | |
| Jabbaan | JIS | SUS 440A | SUS 440B | SUS 440C | SUS 440F |
| Jarmal | DIN | 1.4109 | 1.4122 | 1.4125 | / |
| Shiinaha | GB | 7Cr17 | 8Cr17 | 11Cr17 9Cr18Mo | Y11Cr17 |
Halabuurka Kiimikada ee 440 SS
| Darajooyinka | 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) |
Fiiro gaar ah: qiimayaasha ku jira qawska waa la ogol yahay oo qasab maaha.
Adkaanta 440 SS
| Darajooyinka | Adkaanta, Qaboojinta (HB) | Daaweynta kulaylka (HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
Sida birta caadiga ah ee dahaarka leh, birta aan dahaarka lahayn ee taxanaha 440 ee Saky steel Martensite waxay leedahay astaamaha adkaanta iyada oo loo marayo daminta, waxayna heli kartaa noocyo badan oo astaamo farsamo ah iyada oo loo marayo daawaynta kulaylka kala duwan. Guud ahaan, 440A waxay leedahay waxqabad adag oo heer sare ah iyo adkaansho sare, adkaanteeduna way ka sarreysaa tan 440B iyo 440C. 440B waxay leedahay adkeysi iyo adkeysi ka sarreeya 440A iyo 440C qalabka jarista, qalabka cabbiraadda, qalabka qaboojinta iyo waalka. 440C waxay leedahay adkaanta ugu sarreysa ee dhammaan birta aan miridhku lahayn iyo birta u adkaysata kulaylka ee loogu talagalay qalabka jarista tayada sare leh, af-xidhka iyo qalabka qaboojinta. 440F waa bir goyn xor ah waxaana inta badan loo isticmaalaa qalabka shiididda otomaatiga ah.
Waqtiga boostada: Luulyo-07-2020