Saky bir bir ah ayaa soo saara 440 taxane taxane ah oo adag oo jilicsan oo bir ah iyo taarikada 440a, 440b, 440c
AISI 440A, oo ah UNSEN S44002, JISs, JIS440a, W.-nr. 1.4109 (DIN x70cmo15) Xaashiyaha birta aan cillad lahayn, taarikada, dabaqyada guryaha
AISI 440B, oo ah F44003, JIS SIS440B, W.-nr. 1.4112 (DN X90cmov18) Xaashiyaha birta ee aan lahayn, taarikada, dabaqyada
AISI 440C, Amn S44004, JISs, JIS SUN440C, W.-nr. 1.4125 (DN X105CRO17) Xaashiyaha birta aan cillad lahayn, taarikada, dabaqyada
440A 440b 440C Qeybta kiimikada:
| Heer u qaybin | C | Si | Mn | S | P | Cr | Ni | Mo |
| 440A | 0.60 ~ 0.75 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00 ~ 18.00 | - | ≤0.75 |
| 440b | 0.85 ~ 0.95 | ≤1 | ≤1 | ≤0.030 | ≤0.035 | 16.00 ~ 18.00 | ≤0.60 | ≤0.75 |
| 440c | 0.95 - 1.20 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00 ~ 18.00 | - | ≤0.75 |
Waxyaabaha kaarboon iyo adkeed ee 440a-440B-440c ayaa si isdaba joog ah u kordhay ABC (A-0.75%, B-0.9%, C-1.2%). 440C waa bir aad u wanaagsan oo aad u wanaagsan oo bir ah oo aad u wanaagsan oo leh 56-58 RC. Saddexdaas stels waxay leeyihiin iska caabin wanaagsan, 440a ayaa ugu fiican, iyo 440C ayaa ugu hooseysa. 440C waa caadi. Halabuurka kiimikada ee birta aan caadiga ahayn ee birta aan caadiga ahayn waxaa lagu gartaa isugeynta walxaha sida molybdenum sida molybdenum sida molybdenum, Tungsten, Vaundem, iyo niobium-ka ku saleysan isku darka qaybo kala duwan oo ah 0.1% -17 -27% cr. Maaddaama qaab-dhismeedka unugyadu ay tahay qaab dhismeedka unugyada jidhka, xoogga xoogga heerkulka sare ayuu ku tuuraa. Ka hooseeya 600 ° C, xoogga heerkulka sare ayaa ah kan ugu sarreeya dhammaan noocyada birta aan caadiga ahayn, iyo xoogga gurguurta ayaa sidoo kale ah kan ugu sarreeya. 440A waxay leedahay mid kacsan oo xasilloon oo adag oo adag iyo adkeyn weyn. Waxay leedahay adkeyn ka badan 440b bir iyo 440c bir. 440b waxaa loo isticmaalaa goynta aaladaha, cabbiraadda aaladaha, waxyaabaha iyo tuubooyinka. Waxay leedahay adkeyn ka sarreeya 440a bir iyo adkeyn ka badan 440c bir bir ah. 440C waxay leedahay adkaanta ugu sarreysa ee dhammaan birta birta ah iyo bir kuleylka u adkaysiga leh waxaana loo isticmaalaa nozzles iyo sida loo yaqaan. 440F waa qalin bir ah oo hagaajinaya guryaha fudud ee 440c bir bir ah ee loo yaqaan 'whos'.
Waqtiga Post: Agoosto-17-2018