X10CrAlSi18 1.4742 BS-EN-10095-1999
Steel designation
Name：X10CrAlSi18
Number：1.4742
X10CrAlSi18 1.4742 Chemical composition
C:max.0.12
Si:0.70～1.40
Mn(max):1.00
P(max):0.04
S(max):0.015
Cr:17～19
Al:0.70～1.20
X10CrAlSi18 1.4742 Mechanical properties at room temperature
Form: bars
Thickness a or diameter(d:mm): a ≤ 25
HB max.:212
Proof strength: Rp0,2N/mm2(min):270
Tensile strength （Rm N/mm²）:500～700
A % min:
Long product:15
Flat products:（1）0,5≤a<3：（1，tr）：13 （2）3 < a （1）:15; （tr）:15
X10CrAlSi18 1.4742 Heat treatment
Symbol:+A (A = annealed)
Temperature(℃):800～860
Type of cooling: air, water, In special cases furnace cooling is also permitted
Maximum application temperature Ta for air
Ta max(℃):1000
(The loss of metal caused by scaling does not exceed 1 g/m2⋅h at Ta, and does not exceed 2 g/m2 at Ta + 50 ℃ on average for a period of 120 h with four intermediate coolings.)
Creep properties
Estimated average value of the strength for 1 % elongation at elevated temperature (Strength in N/mm2)
Elongation 1 % in 1 000 h:
500℃:80
600℃:27.5
700℃:8.5
800℃:3.7
900℃:1.8
Elongation 1 % in 10 000 h:
500℃:50
600℃:17.5
700℃:4.7
800℃:2.1
900℃:1.0
Estimated average value of the strength for rupture at elevated temperature
(Strength in N/mm2)
Rupture in 1 000 h:
500℃:160
600℃:55
700℃:17
800℃:7.5
900℃:3.6
Rupture in 10 000 h:
500℃:100
600℃:35
700℃:9.5
800℃:4.3
900℃:1.9
Rupture in 100 000 h:
500℃:55
600℃:20
700℃:5
800℃:2.3
900℃:1.0
Physical properties for the steels and nickel alloys
Density(kg/dm2):7.7
Linear expansion coefficient (10⁻⁶K⁻¹): between 20℃ and
200℃:10.5
400℃:11.5
600℃:12.0
800℃:12.5
1000℃:13.5
Thermal conductivity
W/(m.K)
at 20℃: 19
at 500℃：25
Specific heat capacity
kJ(kg.k)
at 20℃：0.50
Electrical resistivity
Ω.mm²/m
at 20℃：0.93
Magnetizability：yes