High temperature alloys

Material introduction: Such materials at high temperatures in the mechanical properties of the reduction of small, can be in the 600 ℃ above the high temperature long-term work, and has a high high-temperature strength, good oxidation and corrosion resistance, good fatigue properties, fracture toughness and other comprehensive performance. Applied to the use of parts and components in a high-temperature environment.

Element composition:

Model	C	Cr	Ni	Co	W	Nb	Mo	Fe
1.4957	0.4~0.45	20±2	21±2	18.5~21	2~3	1±0.25	3.5±1	Bal.

Model	C	Cr	Al	Mo	Ti	Si	Mn	Nb	Ni
Inco713C	0.08~0.25	13±1	6±0.5	3.8~5.2	0.5~1	≤0.25	≤0.25	1.8~2.9	Bal.

Model	C	Cr	Ni	Si	Mn	Nb	Mo	Fe
HK30	0.25~0.5	25±1	19~22	0.75~1.3	≤1.5	1.2~1.5	≤0.5	Bal.

Model	C	Cr	Ni	Si	Mn	W	Mo	Fe
1.4091	1~1.2	35±1	15±1	≤1	≤1	0.4~0.85	3±1	Bal.

Physical properties:

Properties	Unit	1.4957	Inco713C	HK30	1.4091
Density ρ	g/cm³	>7.80	>7.80	>7.55	>7.40
Hardness	Hv	170	320	190	310
Tensile strength R_m	MPa	650	1370	580	800
Yield strength R_p0.2	MPa	250	900	290	500
Elongation A₁₀	%	30	16	20	2

800℃ high temperature mechanical properties

Model	Testing temperature ℃	Tensile strength R_m MPa	Yield strength R_p0.2 MPa	Elongation A₁₀ %
1.4957	850	270	165	15
Inco713C	600	1100	1000	4.5
Inco713C	1050	170	110	9
HK30	600	560	280	15
	800	300	200	25
	850	290	200	30
1.4091	800	400	230	9

Metallography (×500)