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