SS204 thiab SS304 yog ob qho tib si austenitic stainless hlau, tab sis lawv yog cov sib txawv thiab ua haujlwm sib txawv. SS304, 300-series alloy, yog cov hlau tsis muaj hlau siv dav tshaj plaws rau nws qhov zoo tshaj plaws corrosion kuj thiab ntau yam. SS204, los ntawm 200-series, yog ib qho txiaj ntsig zoo dua nrog cov manganese ntau dua thiab qis dua npib tsib xee, ua rau nws tsim nyog rau qhov kev xav tau tsawg dua.
Kev sib piv tshuaj lom neeg
|
Element |
SS204 (%) |
SS304 (%) |
Kev cuam tshuam |
|---|---|---|---|
|
Chromium (Cr) |
16-18 |
18-20 |
Zoo sib xws hauv paus rau corrosion, tab sis SS304 muaj me ntsis ntxiv rau kev tiv thaiv zoo dua. |
|
Nickel (Ni) |
1-3 |
8-10.5 |
SS304's siab dua Ni txhim kho ductility thiab tsis kam; SS204 tus nqi qis Ni ua rau nws pheej yig dua tab sis tsawg dua corrosion-resistant. |
|
Manganese (Mn) |
5-7 |
Tsawg dua los yog sib npaug 2 |
Siab dua nyob rau hauv SS204 rau austenite stability, nce hardness tab sis txo corrosion kev ua tau zoo. |
|
Cov pa roj carbon (C) |
Tsawg dua los yog sib npaug li 0.15 |
Tsawg dua lossis sib npaug li 0.08 |
Siab dua hauv SS204, muaj peev xwm ua rau muaj kev nkag siab ntau dua. |
|
Silicon (Si) |
Tsawg dua los yog sib npaug li 1 |
Tsawg dua lossis sib npaug li 0.75 |
Qhov txawv me me; ob leeg pab oxidation kuj. |
Mechanical Properties Sib piv
|
Khoom |
SIB 204 |
SIB 304 |
Sau ntawv |
|---|---|---|---|
|
Tensile zog |
620 MPa rau |
515 MPa (min) |
SS204 muaj zog dua hauv lub xeev annealed tab sis tsawg formable. |
|
Yield zog |
310 MPa |
205 MPa (min) |
SS204 muaj cov txiaj ntsig siab dua tab sis tuaj yeem ua nkig. |
|
Elongation |
40% |
40% |
Zoo sib xws ductility. |
|
Hardness (Brinell) |
201 (max) |
201 (max) |
SS204 feem ntau xav tias nyuaj dua hauv kev xyaum. |
|
Qhov ntom |
7.8 g / cm³ |
7.93 g/m² |
Sib piv. |
Corrosion kuj: SS204 vs SS304
SS304 ua tau zoo tshaj SS204 hauv kev tiv thaiv corrosion vim ntau dua npib tsib xee, ua rau nws haum rau sab nraum zoov lossis chaw ntub dej. SS204 xeb yooj yim dua thiab yog qhov zoo tshaj plaws rau kev siv sab hauv tsev. Hauv kev ntsuam xyuas ntsev tsuag, SS304 kav ntev dua, thaum SS204 yog cov xeb liab. Gangsteel's SS304 yog qhov zoo tagnrho rau kev siv dej hiav txwv, tsis zoo li SS204.
Weldability thiab Formability
Ob leeg yog weldable, tab sis SS304 zoo dua rau cov welds nyuaj vim qis manganese, uas tuaj yeem ua rau tawg hauv SS204. Formability zoo ib yam, tab sis SS304 yog ntau ductile.
Kev siv ntawm SS204 thiab SS304
SS304 rau corrosive los yog siv sab nraum zoov (xws li, chemical tanks, marine fittings); SS204 rau sab hauv tsev, tsis yog-corrosive (piv txwv li, rooj tog, tais diav).
