40CrNiMo zafi birgima karfe zagaye sanduna

40CrNiMoA karfe ana amfani da bayan quenching da tempering, kuma ana amfani da su ƙera muhimman sassa bukatar mai kyau roba, high ƙarfi da kuma babban size. Misali, ana iya amfani da magudanar ruwa mai nauyi a cikin injina masu nauyi, injin turbine mai diamita fiye da 250 mm, ruwan wukake, watsawa, kayan ɗamara, crankshafts, gears, da sauransu, kuma ana iya amfani da su don rotor shafts da ruwan wukake masu aiki a yanayin zafi sama da 400. °C.
Chrome-Moly low gami karfe jerin ƙunshi 0.5% - 9% Cr da 0.5% - 1% Mo da ƙasa da 0.20% carbon. 40CrNiMoA, 4340 da SNCM439 sune ƙananan kayan ƙarfe chromoly ƙarfe daga ma'auni daban-daban.

4340 da SNCM439 ka'idoji ne daga Amurka da Jafananci bi da bi. A mafi yawan yanayi za su iya zama madadin kayan aiki, sai dai idan akwai wata sanarwa ta musamman ko amfani da ita don manufa ta musamman. Bambance-bambancen su ya kasance a cikin abubuwan sinadarai, cikakkun bayanai sun nuna kamar haka:

Matsayi	GB	AISI	JIS
Kayan abu	40CrNiMoA	4340	SNCM439 (SNCM8)
C	0.37~0.44	0.38~0.43	0.36~0.43
Si	0.17~0.37	0.15~0.35	0.15~0.35
Mn	0.50~0.80	0.60~0.80	0.60~0.90
P	≤0.025	≤0.035	≤0.030
S	≤0.025	≤0.040	≤0.030
Cr	0.60~0.90	0.70~0.90	0.60~1.00
Ni	1.25~1.65	1.65~2.00	1.60~2.00
Mo	0.15~0.25	0.20~0.30	0.15 ~ 0.30

40CrNiMoA Alloy Karfe Mechanical Properties

• Ƙarfin haɓaka: ≥ 835 MPa
• Ƙarfin ƙarfi: ≥ 980 MPa
• Tsawaitawa: ≥12%
• Yawan raguwa a yanki: ≥55%
• Tasiri tsoma makamashi: ≥ 78 J
• Material Brinell Hardness: ≤ 269 (Annealed ko high zafin jiki tempered karfe sanda)
• Girman samfurin: 25mm

Ƙayyadaddun maganin zafi

• Na farko quenching dumama zafin jiki: 850 °C (Quenchant-man)
• Zazzabi mai zafi: 600 ° C (Quenchant- ruwa, mai)

An yi amfani da shi a inda ake buƙatar babban juriya da ɓangarorin kayan juriya masu kyau kamar  axles masu nauyi, sanduna, kayan aiki masu nauyi, sanduna, fil, studs, kusoshi, couplings, sprockets, pinions, sandunan torsion, sanduna masu haɗawa. An yi amfani da waɗannan ƙananan ƙarfe na ƙarfe mai ƙarfi a wurare kamar masana'antar sinadarai na fetur, motoci, kayan aikin wutar lantarki da sauran ayyuka masu zafi.