Alloy 20 Steel-Stainless

Alloy 20 (UNS N08020) waa austenitic, nikkel-iron-chromium ku salaysan super alloy oo lagu daro Copper iyo Molybdenum kuwaas oo siiya iska caabbinta bay'ada cadawga, godadka, iyo daxalka dillaacsan. Waxa kale oo lagu dejiyaa Columbium si loo yareeyo roobabka karbidhida inta lagu jiro alxanka. Alloy 20 wuxuu u muuqdaa inuu u dhexeeyo labada qaybood ee aan nadiifka ahayn iyo nikkel maadaama ay ka kooban tahay sifooyin labadaba. Waxaa loogu talagalay iska caabbinta ugu badan ee weerarka aashitada waxayna muujineysaa iska caabin heer sare ah oo dillaaca walaaca-daxalka ee karkaraya 20% ilaa 40% sulfuric acid, sidoo kale waxay leedahay caabbinta daxalka guud ee heer sare ah ee sulfuric acid iyo inay dillaacdo cadaadiska koloriyada. Alloy 20 waxa uu leeyahay sifooyin farsamo oo wanaagsan heerkul deegaan iyo heerkul sare labadaba, ilaa ku dhawaad ​​930°F (500°C) waxaana si diyaar ah u farsameeyay hababka warshadaha caadiga ah.

Tilmaamaha

	Heerka	Alloy 20
1	UNS	N08020
2	Workstoff Nr.	2.4660

Guryaha Kiimikada:

NOOCA	C	Cr	Cu	Fe	Mn	Mo	Ni	P	Si	S	Nb (Cb)
Alloy 20 UNS N08020	0.07 max	daq: 19.00 ugu badnaan: 21.00	daq: 3.00 ugu badnaan: 4.00	Dheelitiran	2.00 max	daq: 2.00 ugu badnaan: 3.00	daq: 32.00 ugu badnaan: 38.00	0.045 max	1.00 max	0.035 max	8 XC daq 1.00 max

Guryaha Makaanikada:

Xaalad Deggan-Annealed
Foomka Alaabta	Jilicsan Xoog, ksi (min)	Wax-soo-saarka Xoog, 0.2% la dhimay ksi (min)	Kordhinta % (min)	Dhimista Aagga % (min)	Adag Brinell (max)	Adag Rockwell B (max)
Saxan, Xaashi	80	35	30	-	217	95
Baar	80	35	30	50	-	-

Cufnaanta	8.1 g /cm3
Meesha dhalaalaysa	1443 °C (2430 °F)

Astaamaha

• Daxalka sareeyo, iska caabbinta dillaaca
• Waxay ka kooban tahay Niobium ee xasilinta ka dhanka ah dareenka iyo natiijada daxalka intergranular
• Sifooyin farsamo oo heersare ah iyo wax-abuurid
• Roobabka carbide ugu yar inta lagu jiro alxanka

Codsiyada
Sababo la xiriira caabbinta sare ee daxalka, Alloy 20 waxaa loo isticmaalaa habaynta kiimikada, wax soo saarka cuntada, daawooyinka, koronto iyo codsiyada balaastikada. Valves, bambooyin iyo nidaamyada cadaadiska ayaa ah qaar ka mid ah qaybaha ugu caansan ee Alloy 20 lagu shaqeeyo.