Steel designation
Name:X18CrN28
Number:1.4749

X18CrN28 1.4749 Chemical composition
C: 0.15~0.20 Si:max1.00 Mn(max):1.00 P(max):0.04 S(max):0.015 Cr:26~29 N: 0.15~0.25
X18CrN28 1.4749 Mechanical properties at room temperature
HB max.:212 Proof strength: Rp0,2N/mm2(min):280 Tensile strength (Rm N/mm²):500~700 Long product:15 Flat products:(1)0,5≤a<3:(1,tr):13 (2)3 < a (1):15; (tr):15
X18CrN28 1.4749 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(℃):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:
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℃:10.0 400℃:11.0 600℃:11.5 800℃:12.0 1000℃:13.0
Thermal conductivity
W/(m.K)
at 20℃: 17 at 500℃:23
Specific heat capacity
kJ(kg.k)
at 20℃:0.50
Electrical resistivity
Ω.mm²/m
at 20℃:0.70
Magnetizability:yes