NiCr23Fe 2.4851 BS-EN-10095-1999
Heat resisting nickel alloys
Designation
Name：NiCr23Fe
Number：2.4851
NiCr23Fe 2.4851 Chemical composition
C：0.03～0.10
Mn(max):max.1.00
Si（max）：0.50
P(max):0.020
S(max):0.015
Ni：58.00~63.00
Cr:21.00～25.00
Co: (A maximum of 1,5% Co is allowed andcounted as nickel.Reporting of cobalt is not required.)
Fe: max 18.00
Al:1.00～1.70
Ti:max 0.50
Cu:.max.0.50
B:max 0.006
NiCr23Fe 2.4851 Mechanical properties at room temperature
Form: flat products
Thickness a or diameter(d:mm): a ≤75
Form: bars
Thickness a or diameter(d:mm): d ≤160
Form: rods
Thickness a or diameter(d:mm): d ≤25
HB max.:220
Proof strength: Rp0,2N/mm² (min):205
Tensile strength （Rm N/mm²）:550～750
A % min
Long product: 30
Flat products:（1）0,5≤a<3：（1，tr）：～ （2）3≤ a 1：30 |tr: 30
Heat treatment
Symbol: +AT(AT = solution annealed)
Temperature(℃):1100～1200
Type of cooling: water, air, cooling sufficiently rapid
Maximum application temperature Ta for air
Ta max(℃):1200
Creep properties
Estimated average value of the strength for rupture at elevated temperature
(Strength in N/mm2)
Rupture in 1 000 h:
600℃:264
700℃:153
800℃:60
900℃:20
Rupture in 10 000 h:
600℃:205
700℃:101
800℃:31
900℃:10
1000℃:5
Rupture in 100 000 h:
600℃:156
700℃:55
800℃:17
900℃:4
1000℃：2
Physical properties for the steels and nickel alloys
Density(kg/dm2):8.1
Linear expansion coefficient (10⁻⁶K⁻¹): between 20℃ and
200℃:14.4
400℃:14.8
600℃:15.7
800℃:16.7
1000℃:17.7
Thermal conductivity
W/(m.K)
at 20℃: 11.3
at 500℃：19.2
Specific heat capacity
kJ(kg.k)
at 20℃：0.45
Electrical resistivity
Ω.mm²/m
at 20℃：1.19
Magnetizability：Paramagnetic