NiCr22Mo9Nb 2.4856 BS-EN-10095-1999
Heat resisting nickel alloys
Designation
Name：NiCr22Mo9Nb
Number：2.4856
NiCr22Mo9Nb 2.4856 Chemical composition
C：0.03～0.10
Mn(max):max.0.50
Si（max）：0.50
P(max):0.020
S(max):0.015
Ni：min 58
Cr:20.00～23.00
Co: max 1.00
Fe:max 5.00
Mo:8.00~10.00
Al:max 0.40
Ti:max 0.40
Cu:.max.0.50
Nb+Ta：3.15~4.15
NiCr22Mo9Nb 2.4856 Mechanical properties at room temperature
Form: flat products
（1）Thickness a or diameter(d:mm): 3≤a<75
Proof strength: Rp0,2N/mm² (min)：380
Tensile strength （Rm N/mm²）：760~1000
A % min：Flat products：3≤a（1:30|tr：30）
（2）Thickness a or diameter(d:mm): a<3
Proof strength: Rp0,2N/mm² (min)：415
Tensile strength （Rm N/mm²）：820~1050
A % min：Flat products：0.5≤a<3：（1，tr ：30）
Form: bars
（1）Thickness a or diameter(d:mm):100< d ≤250
Proof strength: Rp0,2N/mm² (min)：345
Tensile strength （Rm N/mm²）：760~1000
A % min：Long product:：25
（2）Thickness a or diameter(d:mm): d≤100
Proof strength: Rp0,2N/mm² (min)：415
Tensile strength （Rm N/mm²）：820~1050
A % min：Long product:：30
Form: rods
Thickness a or diameter(d:mm): d ≤25
Proof strength: Rp0,2N/mm² (min)：415
Tensile strength （Rm N/mm²）：820~1050
A % min：Long product:：30
HB max.:240
Heat treatment
Symbol: +A(A = annealed)
Temperature(℃):950～1000
Type of cooling: water, air, cooling sufficiently rapid
Maximum application temperature Ta for air
Ta max(℃):1000
Creep properties
Estimated average value of the strength for rupture at elevated temperature
(Strength in N/mm2)
Rupture in 1 000 h:
700℃:260
800℃:107
900℃:34
Rupture in 10 000 h:
700℃:190
800℃:63
900℃:20
Physical properties for the steels and nickel alloys
Density(kg/dm2):8.4
Linear expansion coefficient (10⁻⁶K⁻¹): between 20℃ and
200℃:11.1
400℃:12.6
600℃:13.8
800℃:14.9
1000℃:15.8
Thermal conductivity
W/(m.K)
at 20℃: 10
at 500℃：17
Specific heat capacity
kJ(kg.k)
at 20℃：0.41
Electrical resistivity
Ω.mm²/m
at 20℃：1.29
Magnetizability：Paramagnetic