Rau riam, 440 steel yog yuav luag ib txwm zoo dua 420 steel.Txawm li cas los xij, qhov ntawd yog qhov yooj yim -"440" yog hais txog ib tsev neeg ntawm cov hlau, thiab koj yuav tsum paub qhov twg. Qhov sib piv tshaj plaws yog 420 vs . 440C, vim 440C yog qhov siab tshaj - qib ua tau zoo hauv 440 series.
Nov yog qhov tseeb, kev sib piv kom ntxaws los teb "uas zoo dua" rau cov kev xav tau sib txawv.
Teb ceev: Lub Hierarchy
Los ntawm qis tshaj mus rau siab tshaj plaws kev ua tau zoo rau riam:
420 < 440A < 440B < 440C
Yog li, txhua qib 440 (A, B, lossis C) yog qhov zoo tshaj rau cov qauv 420 steel nyob rau hauv cov nqe lus ntawm ntug tuav thiab tag nrho riam kev ua tau zoo . 440C yog qhov zoo dua.
Kev sib piv nthuav dav: 420 vs . 440C (Qhov Feem Ntau Tshaj Plaws 440)
| Khoom | 420 Hlau | 440C steel hlau | Yeej & Vim li cas |
|---|---|---|---|
| Cov ntsiab lus carbon | Tsawg (~ 0.15-0.40%) | Siab (~ 0.95-1.20%) | 440C los ntawm cov npoo loj heev. Carbon yog qhov tseem ceeb rau hardness thiab ntug tuav. |
| Chromium Cov ntsiab lus | ~12-14% | ~16-18% | Zoo sib xws, ob qho tib si muaj kev tiv thaiv corrosion zoo. |
| Hom Hardness (HRC) | 50-55 (Soft) | 57-59 (Medium-Hard, tuaj yeem ncav cuag 60-61 nrog kev kho cua sov zoo) | 440c ua. Harder steel tuav ib tug ntse ntug ntev npaum li cas. |
| Ntug Retention | Poor (Dulls sai heev) | Zoo (Kev hwm rau nws cov chav kawm) | 440C yog qhov zoo heev. |
| Corrosion Resistance | Zoo heev (zoo tshaj plaws hauv chav kawm) | Zoo heev (me ntsis tsawg dua 420 vim muaj cov pa roj carbon ntau dua) | 420 muaj ntug me ntsis, tab sis ob qho tib si muaj xim zoo heev -resistant. |
| Toughness | Zoo heev (Tshwj xeeb heev rau chipping) | Zoo (ntau dua li 420, tab sis tseem tawv) | 420 yog kev zam txim ntau dua rau prying thiab tsim txom. |
| Yooj yim ntawm Sharpening | Yooj yim heev (Yuav ceev kom ntse, txawm nyob rau hauv kas fes mug) | Nruab Nrab (Yuav tsum tau cov pob zeb zoo nkauj) | 420 yog yooj yim dua, tab sis 440C lub ntug yuav siv sij hawm ntev npaum li cas koj yuav sharpen nws deb tsawg zaus. |
| Kev siv thawj zaug | Riam riam, rab riam dhia, cov cuab yeej phais. | Nruab nrab -ntau yam txuj ci, sab nraum zoov, thiab riam chav ua noj zoo dua. |
Kev tawg ntawm 440 Steel Tsev Neeg
"440" tsis yog ib lub steel -nws yog ib tug series. Tsab ntawv tom qab yog qhov tseem ceeb:
440A: Lub hauv paus hloov kho los ntawm 420.
Cov pa roj carbon: 0.65-0.75%
Pros: Zoo ntug tuav dua 420, zoo heev corrosion kuj.
Cons: Tseem txwv piv rau B thiab C.
Kev txiav txim: Ib qho khoom siv, pob nyiaj siv - tus phooj ywg nce qib ntawm 420.
440B: Tus me nyuam nruab nrab.
Cov pa roj carbon: ~ 0.75-0.95%
Pros: Zoo ntug tuav dua 440A.
Cons: Tsawg dua; feem ntau hla hauv kev pom zoo ntawm 440C.
Kev txiav txim: Ib qho hlau zoo, tab sis 440C feem ntau yog lub hom phiaj.
440C: Classic siab -carbon stainless workhorse.
Cov pa roj carbon: ~ 0.95-1.20%
Pros: Qhov zoo tshaj plaws ua ke ntawm hardness, ntug tuav, thiab stainlessness nyob rau hauv 440 tsev neeg. Tau suav hais tias yog cov hlau zoo tshaj plaws rau xyoo lawm.
Cons: tuaj yeem ua rau chipping yog tias cua sov- kho kom muaj zog heev.
Kev txiav txim: Theyeej yeejtawm tsam 420 rau riam ua haujlwm.
Koj yuav tsum xaiv qhov twg? Phau Ntawv Qhia Tswv Yim
Xaiv 420 Steel yog:
Koj qhov tseem ceeb tshaj plaws yog qhov kev tiv thaiv corrosion ntau tshaj plaws (xws li, rau rab riam dhia dej ntsev lossis riam koj yuav tsis quav ntsej).
Koj xav tau ib rab riam rau kev ua haujlwm lossis kev ua haujlwm ntxhib uas qhov nyuaj yog qhov tseem ceeb.
Koj nyob ntawm pob nyiaj siv nruj heev (xav $ 10- $ 20 riam).
Koj yog tus pib ntawm kev ua kom ntse thiab xav tau cov hlau yooj yim tshaj plaws los xyaum.
Xaiv 440C Steel (los yog 440A / B) yog:
Koj xav tau rab riam uas nyob twj ywm ntev dua nyob rau hauv kev siv dav dav (EDC, camping, chav ua noj).
Koj xav tau qhov sib npaug zoo dua ntawm kev ua tau zoo yam tsis tau dhia mus rau premium super steels.
Koj tab tom yuav lub koob npe nrov riam riam hauv $ 30- $ 80 ntau.
Koj muaj nuj nqis ntawm ntug kev tuav pov hwm qhov tsis muaj xeb- pov thawj.
Cov ntsiab lus niaj hnub: 440C vs. Newer Steels
Thaum 440C ntaus 420 yooj yim, nws tam sim no suav tias yog ib qho khoom nruab nrab -ntau, tus nqi- taw qhia steel. Cov hlau tshiab dua li VG-10, 154CM, S30V, thiab D2 muaj kev tuav tuav zoo dua qub, feem ntau muaj qhov zoo sib xws lossis zoo dua corrosion. Txawm li cas los xij, 440C tseem yog qhov zoo tshaj plaws, lub sijhawm sim xaiv rau nws tus nqi taw tes.
Kev txiav txim zaum kawg
| Rau riam... | Zoo dua hlau | Yog vim li cas |
|---|---|---|
| Kev siv dav dav (EDC, Camping) | 440C | Far superior ntug tuav ua rau nws siv tau ntau dua. |
| Ib puag ncig ntub / dej ntsev | 420los yog440A | Me ntsis ntug rau 420 rau corrosion, tab sis 440A yog ib qho kev cuam tshuam zoo. |
| Kev yuav nyiaj txiag | 440Alos yog440C | Kev ua haujlwm ntau dua ib duas dua 420. |
| Nyuaj-Siv/Tuam Tshoj Cov Cuab Yeej | 420 | Nws superior toughness tuaj yeem tuav prying thiab cuam tshuam. |
| Chav ua noj riam | 440C | Yuav tuav txoj haujlwm ua haujlwm los ntawm kev npaj zaub mov. |
Cov kab hauv qab: Rau 99% ntawm cov neeg siv riam tab tom nrhiav cov cuab yeej txiav ua haujlwm, txhua qib ntawm 440 steel (tshwj xeeb tshaj yog 440C) yog qhov zoo dua, muaj peev xwm xaiv ntau dua li 420 steel. Tsuas yog xaiv 420 yog tias koj cov ntaub ntawv siv tshwj xeeb yog qhov tseem ceeb tshaj plaws rau kev tiv thaiv corrosion lossis kev tsim txom -tuaj yeem siab dua lwm yam.