X10NiCrSiNb35-22 1.4887 BS-EN-10095-1999
Austenitic heat-resisting steels
Steel designation
Name：X10NiCrSiNb35-22
Number：1.4887
X10NiCrSiNb35-22 1.4887 Chemical composition
C：max.0.15
Si: 1.00～2.00
Mn(max):max.2.00
P(max):0.030
S(max):0.015
Cr:20.00～23.00
Ni:33.00～37.00
N:.max.0.11
Nb：1.00～1.50
X10NiCrSiNb35-22 1.4887 Mechanical properties at room temperature
Form: rods and sections
Thickness a or diameter(d:mm): d ≤25
HB max.:200
Proof strength: Rp0,2N/mm² (min):270
Rp1,0N/mm²(min):300
Tensile strength （Rm N/mm²）:500～650
A % min
Long product:40
Heat treatment
Symbol: +AT (A T=solution annealed)
Temperature(℃):1050～1150
Type of cooling: water, air, cooling sufficiently rapid
Maximum application temperature Ta for air
Ta max(℃):1100
Creep properties
Estimated average value of the strength for 1 % elongation at elevated temperature (Strength in N/mm2)
Elongation 1 % in 1 000 h:
600℃:110
700℃:60
800℃:25
900℃:12
Elongation 1 % in 10 000 h:
600℃:60
700℃:35
800℃:20
900℃:10
1000℃:(4)
Estimated average value of the strength for rupture at elevated temperature
(Strength in N/mm2)
Rupture in 1 000 h:
600℃:190
700℃:80
800℃:43
900℃:22
Rupture in 10 000 h:
600℃:130
700℃:55
800℃:26
900℃:13
Physical properties for the steels and nickel alloys
Density(kg/dm2):8.0
Linear expansion coefficient (10⁻⁶K⁻¹): between 20℃ and
200℃:15.5
400℃:16.0
600℃:17.0
800℃:17.7
1000℃:18.0
Thermal conductivity
W/(m.K)
at 20℃: 12
at 500℃：19.5
Specific heat capacity
kJ(kg.k)
at 20℃：0.46
Electrical resistivity
Ω.mm²/m
at 20℃：1.0
Magnetizability：no (slightly magnetic when cold worked)