X6NiCrSiNCe35-25 1.4854 BS-EN-10095-1999

X6NiCrSiNCe35-25 1.4854 BS-EN-10095-1999

Austenitic heat-resisting steels

Steel designation

NameX6NiCrSiNCe35-25

Number1.4854

X6NiCrSiNCe35-25 1.4854 Chemical composition

C0.04~0.08

Si: 1.20~2.00

Mn(max):max.2.00

P(max):0.040

S(max):0.015

Cr:24.00~26.00

Ni:34.00~36.00

N:.0.12~0.20

Ce: 0.03~0.08

X6NiCrSiNCe35-25 1.4854 Mechanical properties at room temperature

Form: rods and sections

Thickness a or diameter(d:mm): d ≤25

HB max.:210

Proof strength: Rp0,2N/mm² (min):300

Rp1,0N/mm²(min):340

Tensile strength Rm N/mm²):650~850

A % min

Long product:40

Flat products:(1)0,5≤a<3:(1,tr):40   (2)3 < a  (1|tr): 40

Heat treatment

Symbol: +AT (A T=solution annealed)

Temperature(℃):1100~1150

Type of cooling: water, air, cooling sufficiently rapid

Maximum application temperature Ta for air

Ta max(℃):1170

 

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℃:150

700℃:60

800℃:26

900℃:12.5

1000℃:6.5

 

Elongation 1 % in 10 000 h:

600℃:88

700℃:34

800℃:15

900℃:8

1000℃:4.5

Elongation 1 % in 10 0000 h:

600℃:52

700℃:21

800℃:9.7

900℃:5.1

1000℃:3.0

 

 

Estimated average value of the strength for rupture at elevated temperature

(Strength in N/mm2)

       Rupture in 1 000 h:

600℃:200

700℃:84

800℃:41

900℃:22

1000℃:12

 

 

Rupture in 10 000 h:

600℃:127

700℃:56

800℃:28

900℃:15

1000℃:8

Rupture in 100 000 h:

600℃:80

700℃:36

800℃:18

900℃:9.2

1000℃:4.8

Physical properties for the steels and nickel alloys

Density(kg/dm2):7.9

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

200℃:15.5

400℃:16.5

600℃:17.0

800℃:17.5

1000℃:18.0

Thermal conductivity

W/(m.K)

      at 20℃: 11

at 500℃:18.5

 

Specific heat capacity

kJ(kg.k)

        at 20℃:0.45

 

  Electrical resistivity

             Ω.mm²/m

       at 20℃:1.0

 Magnetizability:no (slightly magnetic when cold worked)

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