Steel designation

NameX18CrN28

Number1.4749

X18CrN28 1.4749 BS-EN-10095-1999

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 Tfor 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

 Magnetizabilityyes