X18CrN28 1.4749 BS-EN-10095-1999

X18CrN28 1.4749 BS-EN-10095-1999

Steel designation

NameX18CrN28

Number1.4749

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

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