X6NiCrNbCe32-27 1.4877 BS-EN-10095-1999

X6NiCrNbCe32-27 1.4877 BS-EN-10095-1999

Austenitic heat-resisting steels

Steel designation

NameX6NiCrNbCe32-27

Number1.4877

X6NiCrNbCe32-27 1.4877 Chemical composition

C0.04~0.08

Si: max.0.30

Mn(max): 1.00

P(max): 0.020

S(max): 0.010

Cr: 26.00~28.00

Ni: 31.00~33.00

N0.11

Almax.0.025

Ce: 0.05~0.10

Nb: 0.60~1.00

X6NiCrNbCe32-27 1.4877 Mechanical properties at room temperature

Form: bars

Thickness a or diameter(d:mm): a ≤160

HB max.:223

Proof strength: Rp0,2N/mm² (min):180

Rp1,0N/mm²(min):220

Tensile strength Rm N/mm²):500~750

A % min

Long product:35

Heat treatment

Symbol: +AT (A T=solution annealed)

Temperature(℃):1050~1150

Type of cooling: water, air, cooling sufficiently rapid

Maximum application temperature Ta for air

Ta max(℃):1150

(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 rupture at elevated temperature

(Strength in N/mm²)

 

Rupture in 10 000 h:

600℃:175

700℃:80

800℃:24

900℃:10

1000℃:3.5

 

Rupture in 100 000 h:

600℃:140

700℃:52

800℃:16

900℃:5

1000℃:1.5

 

Physical properties for the steels and nickel alloys

Density(kg/dm2):8.0

Linear expansion coefficient (10⁻⁶K⁻¹): between 20℃ and

200℃:15.5

400℃:16.5

600℃:16.5

800℃:17.7

1000℃:18.4

Thermal conductivity

W/(m.K)

      at 20℃: 12

at 500℃:20

 

Specific heat capacity

kJ(kg.k)

        at 20℃:0.45

 

  Electrical resistivity

             Ω.mm²/m

       at 20℃:0.96

 Magnetizability:no (slightly magnetic when cold worked)

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