因科洛伊合金 800

Incoloy 800/800H/800HT Specification

Incoloy 800 is also known as Alloy 800. Its nickel-iron-chromium composition makes it useful in environments with temperatures up to 1100° F. Incoloy 800/H/HT are used in areas where resistance to corrosion and oxidation is crucial.

Incoloy 800H has the same composition as Alloy 800: a nickel-iron-chromium alloy. 然而, Incoloy 800H has superior resistance to creep rupture compared to Alloy 800. The increased strength results from a high temperature anneal of carbon, aluminum and titanium added into the composition. The additions serve to increase Incoloy 800 H’s strength and temperature resistance, along with resistance to carbonization and oxidation.

Incoloy 800 HT has the same chemical makeup as Incoloy 800 H but for the differences in carbon, aluminum and titanium quantities. Incoloy 800 H has more carbon, but Incoloy 800 HT is composed of more aluminum and titanium. This gives 800 HT even greater resistance to high temperatures. Incoloy 800 H/HT are recommended for temperatures exceeding 1100° F, often in instances where stainless steels are subject to crack and creep. The Incoloy alloys are commonly used in high temperature environments, such as industrial furnaces, chemical and nuclear vessels, and heat-treating equipment. Both Incoloy 800 H and 800 HT are dually certified.

Incoloy 800/800H/800HT Products Form

• 床单
• 盘子
• 酒吧
• 管道 & 管子 (焊接的 & 无缝的)
• 配件
• Elbows, 发球台, 短端, 回报, 帽子, 十字架, 减速机, 管接头. ETC.
• 金属丝

Applications for Incoloy 800/800H/800HT

• Heat exchangers and process piping
• 化学加工
• Carburizing fixtures and retorts
• Oil and gas industries
• Nuclear and power industries
• Commercial Gas Turbines
• Furnace components
• Food Processing
• Electric range heating-element sheathing
• Chemical Processing
• Cryogenic Storage Tanks
• Ammonia effluent coolers
• Power generation industries
• Nuclear reactors
• Gas turbines engines
• Pressure vessels

乙quivalents of Incoloy 800/800H/800HT

标准	Incoloy 800	Incoloy 800H	Incoloy 800HT
UNS	N08800	N08810	N08811
WERKSTOFF NR.	1.4876	1.4958 / 1.4876	1.4859 / 1.4876
在	X10NiCrAlTi32-20	X5NiCrAlTi31-20	X8NiCrAlTi32-21
BS	NA 15	NA 15(H)	NA 15(HT)
OR	XH32T	XH32T	XH32T
国家标准	ЭИ670	ЭИ670	ЭИ670
他	NCF 800	NCF 800H	NCF 800HT
AFNOR	Z8NC32-21	Z8NC33-21	–

Chemical Composition – Incoloy 800 / 800H / 800HT

ELEMENT	INCOLOY 800	INCOLOY 800H	INCOLOY 800HT
NI	30.0 – 35.0	30.0 – 35.0	30.0 – 35.0
CR	19.0 – 23.0	19.0 – 23.0	19.0 – 23.0
FE	39.5 分钟	39.5 分钟	39.5 分钟
MN	1.5 最大限度	1.5 最大限度	1.5 最大限度
C	0.10 最大限度	0.05 – 0.10	0.06 – 0.10
CU	0.75 最大限度	0.75 最大限度	0.75 最大限度
SI	1.0 最大限度	1.0 最大限度	1.0 最大限度
S	0.015 最大限度	0.015 最大限度	0.015 最大限度
AL	0.15 – 0.60	0.15 – 0.60	0.15 – 0.60
TI	0.15 – 0.60	0.15 – 0.60	0.15 – 0.60

* UNS N08811 : Al + Ti = 0.85 – 1.20

Specified Minimum Mechanical Properties

ASTM B407 – Seamless Pipe & 管子

		屈服强度	抗拉强度	伸长
		兆帕	兆帕	%
Incoloy 800, 800H, 800HT	Hot Finished, 退火	170	450	30
Incoloy 800	Cold Worked, 退火	205	520	30

物理特性

密度	0.287 lb/in3 / 7.94 克/立方厘米
Melting Point	2475 – 2525 °F/ 1357 – 1385 ℃
Specific Heat @ 70°F	0.11 BTU/lb-°F (32 – 212°F) 460 J/kg-°K (0 –100°C)
Thermal Conductivity @ 212°F	10.6 BTU/hr/ft2/ft/°F 18.3 W/m-°K
Elastic Modulus	28.5 X 106 psi 196.5 GPa
电阻率	59.5 Microhm-in at 68°F 99 Microhm-cm at 20°C
退火	983 – 1038 ℃ / 1800 – 1900 °F
Quench	Rapid Air
Permeability @ 70°F Annealed	1.014 (200 Oersted)
Curie Temperature	-115 °C/ -175 °F

耐腐蚀性能

Incoloy 800/800H/800HT is generally free from both chloride stress corrosion cracking and intergranular corrosion caused by sensitisation. The alloy can be used in sea water. Incoloy 800/800H/800HT has resistance to acids similar to austenitic stainless steels. It has excellent resistance to both oxidising and non oxidising salts, except for halide salts, where pitting may occur. Please consult Austral Wright Metals for advice on your specific application.

热处理

The grade has high rate of work hardening. Hence, after cold working to remove brittleness, the grade needs to annealed. Annealing is done by heating the grade about 980°C for about 15 minutes, and then air cooling.

热加工

INCOLOY alloy 800 can be hot worked at temperature ranges of 871-1232°C (1600-2250°F).

冷加工

Cold working may be done on the alloy using standard tooling.

Machinability

Incoloy 800/800H/800HT are “C” class alloys, difficult to machine. Heavy machines, sharps, slow speeds and deep cuts to remove the work hardened layer are needed.

焊接

The grade can be readily welded by common welding techniques like gas tungsten arc welding, shielded metal arc welding, metal inert gas welding, ETC. Post-weld annealing might not be required. The grade can be appropriately brushed for impurities and heat tint is removed after welding.

Fabrication

Incoloy 800/800H/800HT can be readily hot worked. Forging is finished above 870°C, and air cooled. The work is then solution annealed. The alloys can be cold formed similarly to stainless steel but deformation forces are higher.