440A vs . 440B vs . 440C Stainless hlau: Qhov txawv qhov tseem ceeb?

440A Stainless hlau yog dab tsi?

440A steel yog siab - carbon martensitic stainless hlau uas sib txuas lub zog zoo, nruab nrab corrosion kuj, thiab zoo heev hardness thiab hnav tsis kam. Nws muaj kwv yees li 0.60-0.75% carbon thiab 16.0-18.0% chromium, tso cai rau nws ua kom muaj zog heev los ntawm kev kho cua sov. Qhov no ua rau nws haum rau kev siv xws li cov hniav, cov cuab yeej phais, thiab pob bearings.

 

440B Stainless hlau khoom yog dab tsi?

440B stainless hlau yog siab - carbon martensitic chromium stainless hlau nrog siab hardness thiab siab hnav tsis kam, khoom tiav los ntawm kev kho cua sov. Nws yog cov khoom siv ntau yam tsim nyog rau kev thov xws li cov cuab yeej txiav, cov cuab yeej phais, thiab pob bearings. Nws qhov nruab nrab corrosion kuj tuaj yeem ua kom zoo dua los ntawm kev tu kom zoo thiab kev kho mob passivation, tshwj xeeb tshaj yog tom qab machining.

 

440C Stainless hlau yog dab tsi?

440C yog ib qho siab - carbon martensitic stainless hlau paub txog nws cov hardness siab, lub zog, thiab hnav tsis kam. Nws muaj cov ntsiab lus chromium siab (16-}18%) thiab cov ntsiab lus carbon ntawm 0.95% txog 1.20%, uas tso cai rau nws ua kom muaj zog heev los ntawm kev kho cua sov. Nws yog tsim rau high-end tableware, bearings, thiab cov cuab yeej phais, ntawm lwm yam kev siv.

 

Cov qib sib npaug ntawm 440 SS

Neeg Asmeskas	ASTM	440A	440B	440C	440F
UNS	S44002	S44003	S44004	S44020
Nyiv	JIS	SUS 440A	SIB 440B	SUS 440 C	SUS 440 F
German	DIN	1.4109	1.4122	1.4125	/
Tuam Tshoj	GB	7 cr17	8 cr17	11 Cr17 9c18 hmo	Y11Cr17

 

440A vs . 440B vs . 440C Stainless hlau: Cov tshuaj muaj pes tsawg leeg

Qib	C	Si	Mn	P	S	Cr	Mo	Cu	Ni
440A	0.6-0.75	Tsawg dua lossis sib npaug li 1.00	Tsawg dua lossis sib npaug li 1.00	Tsawg dua lossis sib npaug li 0.04	Tsawg dua los yog sib npaug li 0.03	16.0-18.0	Tsawg dua lossis sib npaug li 0.75	(tsawg dua los yog sib npaug rau 0.5)	(tsawg dua los yog sib npaug rau 0.5)
440B	0.75-0.95	Tsawg dua lossis sib npaug li 1.00	Tsawg dua lossis sib npaug li 1.00	Tsawg dua lossis sib npaug li 0.04	Tsawg dua los yog sib npaug li 0.03	16.0-18.0	Tsawg dua lossis sib npaug li 0.75	(tsawg dua los yog sib npaug rau 0.5)	(tsawg dua los yog sib npaug rau 0.5)
440C	0.95-1.2	Tsawg dua lossis sib npaug li 1.00	Tsawg dua lossis sib npaug li 1.00	Tsawg dua lossis sib npaug li 0.04	Tsawg dua los yog sib npaug li 0.03	16.0-18.0	Tsawg dua lossis sib npaug li 0.75	(tsawg dua los yog sib npaug rau 0.5)	(tsawg dua los yog sib npaug rau 0.5)
440F	0.95-1.2	Tsawg dua lossis sib npaug li 1.00	Tsawg dua lossis sib npaug li 1.25	Tsawg dua lossis sib npaug li 0.06	Ntau dua lossis sib npaug li 0.15	16.0-18.0	/	(Less tshaj los yog sib npaug rau 0.6)	(tsawg dua los yog sib npaug rau 0.5)

 

440A vs . 440B vs . 440C Stainless hlau: Lub cev muaj zog

Khoom	440A	440B	440C
Tensile zog (MPa)	700–800	750–850	800–900
Yield zog 0.2% (MPa)	450–500	450–500	500–550
Hardness (HRC)	44–48	48–52	54–58
Elongation (%)	12–15	10–12	8–10

 

440A vs . 440B vs . 440C Stainless hlau: Hardness

Lub hardness ntawm 440A, 440B, thiab 440C stainless hlau nce los ntawm A rau C, nrog 440C yog qhov nyuaj tshaj plaws.

Qib	Hardness, Annealing (HB)	Kev kho cua sov (HRC)
440A	Tsawg dua lossis sib npaug li 255	Ntau dua lossis sib npaug li 54
440B	Tsawg dua lossis sib npaug li 255	Ntau dua lossis sib npaug li 56
440C	Tsawg dua lossis sib npaug li 269	Ntau dua lossis sib npaug li 58
440F	Tsawg dua lossis sib npaug li 269	Ntau dua lossis sib npaug li 58

 

ASTM Cov Lus Qhia

Qib	Tube / Tube (SMLS)	Bar	Forging	Hlau
440A	A 511	A 276, A 314	A 473	A 580
440B	-	A 276, A 314	A 473	A 580
440C	-	A 276, A 314	A 473	A 493

 

440A Vs . 440B Vs . 440C Stainless Hlau: Corrosion Resistance
440A muaj qhov corrosion siab tshaj plaws ntawm peb qib, ua raws li 440B, nrog 440C muaj qhov qis tshaj. Qhov no yog vim cov qib tau nce cov ntsiab lus carbon, thiab cov qib siab dua cov pa roj carbon monoxide txo qhov kev tiv thaiv corrosion thaum nce hardness thiab hnav tsis kam. Yog li ntawd, 440A raug xaiv thaum corrosion kuj yog qhov tseem ceeb, thaum 440C yog siv rau daim ntaub ntawv xav tau qhov loj tshaj hardness thiab lub zog.

440A Vs . 440B Vs. 440C Stainless Hlau: Machinability
440C yog qhov tsawg tshaj plaws machinable vim nws cov ntsiab lus carbon siab, thaum 440A yog qhov machinable tshaj plaws vim tias nws muaj cov ntsiab lus carbon qis tshaj . 440B poob rau hauv nruab nrab, muab kev sib haum xeeb ntawm 440A lub machinability thiab 440C lub hardness. Tag nrho peb yuav nyuaj rau tshuab ib zaug thaum tshav kub kub-kho kom siab hardness, yog li nws raug pom zoo kom tshuab lawv nyob rau hauv annealed (softened), siv cov cuab yeej xws li chip breakers thiab ceramic los yog carbide tooling.

 

440A vs . 440B vs . 440C Stainless hlau: Sib nqus

Tag nrho peb cov stainless hlau, 440A, 440B, thiab 440C, yog sib nqus vim lawv yog tag nrho cov martensitic stainless hlau uas tuaj yeem hardened los ntawm kev kho cua sov. Qhov sib txawv tseem ceeb ntawm lawv yog lawv cov ntsiab lus carbon, uas nce ntawm 440A mus rau 440C, cuam tshuam rau hardness thiab corrosion kuj, tab sis tag nrho cov nyob twj ywm sib nqus nyob rau hauv ob qho tib si annealed thiab hardened xeev.

 

Yog tias koj muaj qhov project xav tau rau 440A, 440B, thiab 440C stainless hlau tuav, thov koj xav tso qhov kev txiav txim. GNEE muaj cov khoom muag loj ntawm cov khoom nrov rau koj xaiv. Lawv tuaj yeem ua tiav rau hauv ntau yam khoom siv, nrog rau cov phaj, coils, raj, tuav, thiab xaim. Rau cov ncauj lus kom ntxaws cov tshuaj muaj pes tsawg leeg thiab kuaj dawb, thov hu rau peb lub Hoobkas tam sim ntawd. Peb muab cov nqi sib tw thiab kev pabcuam zoo heev.Email:info@gneestainless.com