Alloy 20 igwe anaghị agba nchara

Alloy 20 (UNS N08020) bụ ihe austenitic, nickel-iron-chromium nke dabere na nnukwu alloy yana mgbakwunye ọla kọpa na Molybdenum nke na-enye iguzogide gburugburu ebe ọjọọ, nbibi na corrosion crevice. A na-edozi ya na Columbium iji belata oke mmiri carbide n'oge ịgbado ọkụ. Alloy 20 dị ka ọ na-ada n'etiti ma igwe anaghị agba nchara na nickel ka o nwere njirimara nke abụọ ahụ. Emebere ya maka oke iguzogide ọgụ acid wee gosipụta nguzogide nrụgide-corrosion na-agbawa na esi 20% ruo 40% sulfuric acid, ma nweekwa ọmarịcha nguzogide corrosion izugbe na sulfuric acid yana chloride stress corrosion cracking. Alloy 20 nwere ezigbo ihe eji arụ ọrụ na ma ihu igwe yana okpomọkụ dị elu, ihe ruru 930°F (500°C) ma na-emepụta ya ngwa ngwa site na usoro mmepụta ihe.

Nkọwapụta

	Ọkọlọtọ	Alloy 20
1	UNS	N08020
2	Ụlọ ọrụ Nr.	2.4660

Njirimara kemịkalụ:

Ụdị	C	Cr	Ku	Fe	Mn	Mo	Ni	P	Si	S	Nb (Cb)
Alloy 20 UNS N08020	0.07 max	Nkeji: 19.00 kacha: 21.00	Nkeji: 3.00 kacha elu: 4.00	Nhazi	2.00 max	Nkeji: 2.00 kacha elu: 3.00	Nkeji: 32.00 kacha: 38.00	0.045 max	1.00 max	0.035 max	8 xC min 1.00 kacha

Ngwongwo igwe:

Ọnọdụ kwụsiri ike-Anneal
Ụdị ngwaahịa	Ịkwụsị Ike, ksi (min)	Mmụba Ike, 0.2% kwụsịrị ksi (nkeji)	Mgbatị % (nkeji)	Mbelata Mpaghara % (nkeji)	Isi ike Brinell (max)	Isi ike Rockwell B (max)
Efere, Mpempe akwụkwọ	80	35	30	-	217	95
Ogwe	80	35	30	50	-	-

Njupụta	8.1 g /cm3
Ebe Na-agbaze	1443 Celsius (2430 Celsius)

Atụmatụ

• Nke ka elu corrosion, pitting na crevice iguzogide
• Nwere Niobium maka nkwụsi ike megide mmetụta uche yana ihe kpatara corrosion intergranular
• Magburu onwe n'ibu Njirimara na fabricability
• Obere mmiri ozuzo carbide n'oge ịgbado ọkụ

Ngwa
N'ihi nnukwu iguzogide corrosion, Alloy 20 na-eji nhazi kemịkalụ, mmepụta nri, ọgwụ, ike ike na ngwa plastik. Valves, nfuli na sistemu nrụgide bụ ụfọdụ n'ime ihe ndị kachasị ewu ewu ebe Alloy 20 na-arụ ọrụ.