Aloi 20 uamea uamea

Alloy 20 (UNS N08020) o se austenitic, nickel-iron-chromium faʻavae sili faʻapipiʻi faʻatasi ai ma faʻaopoopoga o Copper ma Molybdenum lea e maua ai le teteʻe atu i siosiomaga faʻafefe, pitting, ma crevice corrosion. E faʻamautu foi ma Columbium e faʻaitiitia ai le carbide precipitation i le taimi o le uelo. Alloy 20 e foliga mai e pa'ū i le va o vaega uma e lua ma le nickel ona o loʻo i ai uiga o mea uma e lua. Na mamanuina mo le maualuga o le teteʻe atu i osofaʻiga oona ma faʻaalia le maualuga o le teteʻe atu i le faʻalavelave faʻafefe i le faʻafefeina o le 20% i le 40% sulfuric acid, ma e iai foʻi le lelei tele o le faʻafefeteina o le sulfuric acid ma le chloride stress corrosion cracking. Alloy 20 o lo'o i ai mea fa'ainisinia lelei i le si'osi'omaga ma le maualuga o le vevela, e o'o atu i le 930°F (500°C) ma e faigofie ona gaosia e ala i faiga fa'apisinisi masani.

Fa'amatalaga

	Tulaga	Alu 20
1	UNS	N08020
2	Werkstoff Nr.	2.4660

Meatotino tau vailaau:

ITIGA	C	Cr	Cu	Fe	Mn	Mo	Ni	P	Si	S	Nb (Cb)
Alu 20 UNS N08020	0.07 maualuga	min: 19.00 maualuga: 21.00	min: 3.00 maualuga: 4.00	Paleni	2.00 maualuga	min: 2.00 maualuga: 3.00	min: 32.00 maualuga: 38.00	0.045 maualuga	1.00 maualuga	0.035 maualuga	8 XC min 1.00 maualuga

Meatotino Fa'ainisinia:

Tulaga Fa'amau-A'oa'i
Fomu o oloa	Tensile Malosi, ksi (min)	Tuuina atu Malosi, 0.2% offset ksi (min)	Fa'aumi % (min)	Fa'aitiitiga o le Eria % (min)	Malosi Brinell (maualuga)	Malosi Rockwell B (maxi)
Papatusi, Pepa	80	35	30	—	217	95
Pa	80	35	30	50	—	—

Malosi	8.1 g/cm3
Lisi Lisi	1443 °C (2430 °F)

Vaega

• E sili atu le pala, pitting ma fa'ama'i
• O lo'o iai le Niobium mo le fa'amautu e fa'asaga i lagona ma'ale'ale ma fa'atupu ai le pala intergranular
• Lelei faʻainisinia meatotino ma fabricability
• Laiti carbide timuga i le taimi uelo

Talosaga
Ona o le maualuga o le tetee atu i le pala, Alloy 20 o loʻo faʻaaogaina i le gaosiga o vailaʻau, gaosiga o meaʻai, vailaʻau, gaosiga o le eletise ma mea faʻapipiʻi. Valves, pamu ma faiga fa'amalosi o nisi ia o vaega sili ona lauiloa o lo'o fa'aogaina ai le Alloy 20.