X10NiCrSiNb35-22 1.4887 BS-EN-10095-1999

X10NiCrSiNb35-22 1.4887 BS-EN-10095-1999

Austenitic heat-resisting steels

Steel designation

Name:X10NiCrSiNb35-22

Number:1.4887

X10NiCrSiNb35-22 1.4887 Chemical composition

Cmax.0.15

Si: 1.00~2.00

Mn(max):max.2.00

P(max):0.030

S(max):0.015

Cr:20.00~23.00

Ni:33.00~37.00

N:.max.0.11

Nb1.00~1.50

X10NiCrSiNb35-22 1.4887 Mechanical properties at room temperature

Form: rods and sections

Thickness a or diameter(d:mm): d ≤25

HB max.:200

Proof strength: Rp0,2N/mm² (min):270

Rp1,0N/mm²(min):300

Tensile strength Rm N/mm²):500~650

A % min

Long product:40

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(℃):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:

600℃:110

700℃:60

800℃:25

900℃:12

 

Elongation 1 % in 10 000 h:

600℃:60

700℃:35

800℃:20

900℃:10

1000℃:(4)

 

Estimated average value of the strength for rupture at elevated temperature

(Strength in N/mm2)

       Rupture in 1 000 h:

600℃:190

700℃:80

800℃:43

900℃:22

 

 

Rupture in 10 000 h:

600℃:130

700℃:55

800℃:26

900℃:13

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℃:16.0

600℃:17.0

800℃:17.7

1000℃:18.0

Thermal conductivity

W/(m.K)

      at 20℃: 12

at 500℃:19.5

 

Specific heat capacity

kJ(kg.k)

        at 20℃:0.46

 

  Electrical resistivity

             Ω.mm²/m

       at 20℃:1.0

 Magnetizability:no (slightly magnetic when cold worked)

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