Bir fidsan oo aan daxal lahayn oo 440C ahwaa badeeco bir ah oo tayo sare leh oo loo yaqaan isku-darka gaarka ah ee iska caabbinta xirashada iyo iska caabbinta daxalka. Waxay ka tirsan tahay qoyska birta aan miridhku lahayn ee martensitic waxaana si weyn loogu isticmaalaa warshado kala duwan si ay u hesho waxqabad heer sare ah.
Heerka 440C Bir aan Daxal Lahayn iyo Darajooyinka Birta U dhiganta
| Waddan | Mareykanka | BS & DIN | Jabaan |
| Heerka Caadiga ah | ASTM A276 | EN 10088 | JIS G4303 |
| Darajooyinka | S44004/440C | X105CrMo17/1.4125 | SUS440C |
Halabuurka Kiimikada Birta ASTM A276 440C iyo Waxyaabaha U Dhigan
| Heerka Caadiga ah | Fasal | 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 |
Bir aan miridh lahayn oo 440C ahFarsamadaGuryaha
| Heerkulka Kululaynta (°C) | Xoogga Tijaabada (MPa) | Xoog Wax-soo-saar 0.2% Caddeyn (MPa) | Kordhinta (% gudaha 50mm) | Adkaanta Rockwell (HRC) | Saamaynta Charpy V (J) |
| La duubay* | 758 | 448 | 14 | 269HB ugu badnaan# | - |
| 204 | 2030 | 1900 | 4 | 59 | 9 |
| 260 | 1960-kii | 1830 | 4 | 57 | 9 |
| 306 | 1860 | 1740 | 4 | 56 | 9 |
| 371 | 1790 | 1660 | 4 | 56 | 9 |
Waa kuwan qaar ka mid ah qodobbada muhiimka ah ee lagu soo bandhigayo birta aan lahayn 440C ee fidsan:
1. Halabuurka: Birta aan miridhku lahayn ee 440C waxay ka kooban tahay chromium (16-18%), kaarboon (0.95-1.20%), iyo tiro yar oo walxo kale ah sida manganese, silicon, iyo molybdenum.
2. Iska caabinta Xidhmada: Birta fidsan ee 440C ee aan miridhku lahayn ayaa caan ku ah iska caabinta xirashada ee aadka u fiican, taasoo ka dhigaysa mid ku habboon codsiyada ku lug leh walxaha xoqidda, qalabka jarista, boolal, iyo qaybaha u adkaysta xirashada.
3. Iska caabbinta daxalka: Inkastoo ay tahay bir aan kaarboon lahayn oo aad u badan, 440C waxay muujisaa iska caabbin wanaagsan oo daxalka ah.
4. Adkaanta iyo Xoogga: Birta fidsan ee 440C ee aan miridhku lahayn waxay leedahay adkeysi aad u fiican iyo xoog sare, taasoo siinaysa cimri dherer iyo cimri dheer codsiyada adag.
Waqtiga boostada: Luulyo-05-2023


