Sib piv 40CrNiMoA, 4340 thiab SNCM439
Chromium low alloy steel series-Moly muaj 0.5%- 9% Cr thiab 0.5%- 1% Mo thiab tsawg dua 0.20% carbon. 40CrNiMoA, 4340 thiab SNCM439 yog cov ntaub ntawv ntawm chromoly low alloy steel ntawm cov qauv sib txawv ntawm cov qauv siab CrNiMo steel npib tsib xee-chromium{13}} molybdenum nrog zoo hardenability thiab toughness . 4340 thiab SNCM439 American thiab Japanese cov qauv feem. Feem ntau lawv yuav yog lwm cov ntaub ntawv, tshwj tsis yog tias muaj daim ntawv tshwj xeeb lossis siv rau lub hom phiaj tshwj xeeb. Lawv qhov sib txawv tsuas yog muaj nyob rau hauv cov khoom siv tshuaj, cov ntaub ntawv tau qhia hauv qab no:
Cov qauv | GB | AISI | JIS |
Khoom siv | 40CrNiMoA | 4340 | SNCM439 (NCM8) |
c | 0.37 ~ 0.44 hli | 0.38 ~ 0.43 hli | 0.36 ~ 0.43 hli |
Yog lawm | 0.17-0.37 Nws | 0.15-0.35 Nws | 0.15-0.35 Nws |
M.N. | 0.50 ~ 0.80 hli | 0.60 ~ 0.80 hli | 0.60 ~ 0.90 hli |
Q | Tsawg dua lossis sib npaug li 0.025 | Tsawg dua lossis sib npaug li 0.035 | Tsawg dua lossis sib npaug li 0.030 |
Yog lawm | Tsawg dua lossis sib npaug li 0.025 | Tsawg dua lossis sib npaug li 0.040 | Tsawg dua lossis sib npaug li 0.030 |
C.R. | 0.60 ~ 0.90 hli | 0.70 ~ 0.90 hli | 0.60-1.00 Nws |
Tsis yog | 1.25-1.65 Nws | 1.65-2.00 Nws | 1.60-2.00 Nws |
mo | 0.15 ~ 0.25 hli | 0.20 ~ 0.30 Nws | 0.15-0.30 Nws |
Nws yog siv nyob rau hauv qhov chaw muaj zog tensile siab thiab zoo hnav tsis kam ua raws li qhov yuav tsum tau muaj xws li lub luag haujlwm hnyav, axles, lub luag haujlwm hnyav, shafts, bolts, studs, bolts, couplings, sprockets, sprockets, torsion tuav, txuas rods. Cov high tensile zog alloy steel tau dav siv nyob rau hauv cov cheeb tsam xws li roj av chemical kev lag luam, tsheb, chav fais fab mov thiab lwm yam kev pab cuam kub.
