NiCr20Ti 2.4951 BS-EN-10095-1999
Heat resisting nickel alloys
Designation
Name：NiCr20Ti
Number：2.4951
NiCr20Ti 2.4951 Chemical composition
C：0.08～0.15
Mn(max):max.1.00
Si（max）：1.00
P(max):0.020
S(max):0.015
Ni：Rest
Cr:14.00～17.00
Co: max 5.00
Fe:max 5.00
Al:max 0.30
Ti:max 0.20～0.60
Cu:.max.0.50
NiCr20Ti 2.4951 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.:230
Proof strength: Rp0,2N/mm² (min):240
Tensile strength （Rm N/mm²）:550～850
A % min
Long product: 30
Flat products:（1）0,5≤a<3：（1，tr）：～ （2）3≤ a 1：30 |tr: ～
Heat treatment
Symbol: +A(A = annealed)
Temperature(℃):1000～1050
Type of cooling: water, air, cooling sufficiently rapid
Maximum application temperature Ta for air
Ta max(℃):1150
Creep properties
Estimated average value of the strength for rupture at elevated temperature
(Strength in N/mm2)
Rupture in 1 000 h:
800℃:37
900℃:20
1000℃:11
Rupture in 10 000 h:
600℃:100
700℃:36
800℃:17
900℃:10
1000℃:6
Rupture in 100 000 h:
600℃:68
700℃:23
800℃:11.5
900℃:7
1000℃:5
Physical properties for the steels and nickel alloys
Density(kg/dm2):8.4
Linear expansion coefficient (10⁻⁶K⁻¹): between 20℃ and
200℃:12.7
400℃:13.9
600℃:15.0
800℃:16.5
1000℃:18.2
Thermal conductivity
W/(m.K)
at 20℃: 12
at 500℃：20
Specific heat capacity
kJ(kg.k)
at 20℃：0.46
Electrical resistivity
Ω.mm²/m
at 20℃：1.09
Magnetizability：Paramagnetic