NiCr22Mo9Nb 2.4856 BS-EN-10095-1999

NiCr22Mo9Nb 2.4856 BS-EN-10095-1999

Heat resisting nickel alloys

Designation

Name:NiCr22Mo9Nb

Number:2.4856

NiCr22Mo9Nb 2.4856 Chemical composition

C0.03~0.10

Mn(max):max.0.50

Si(max):0.50

P(max):0.020

S(max):0.015

Nimin 58

Cr:20.00~23.00

Co: max 1.00

Fe:max 5.00

Mo:8.00~10.00

Al:max 0.40

Ti:max 0.40

Cu:.max.0.50

Nb+Ta3.15~4.15

NiCr22Mo9Nb 2.4856 Mechanical properties at room temperature

Form: flat products

(1)Thickness a or diameter(d:mm): 3a<75

Proof strength: Rp0,2N/mm² (min):380

Tensile strength Rm N/mm²):760~1000

A % min:Flat products:3≤a(1:30|tr:30)

(2)Thickness a or diameter(d:mm): a<3

Proof strength: Rp0,2N/mm² (min):415

Tensile strength Rm N/mm²):820~1050

A % min:Flat products:0.5≤a<3:(1,tr :30)

 

Form: bars

(1)Thickness a or diameter(d:mm):100< d ≤250

Proof strength: Rp0,2N/mm² (min):345

Tensile strength Rm N/mm²):760~1000

A % minLong product::25

(2)Thickness a or diameter(d:mm): d100

Proof strength: Rp0,2N/mm² (min):415

Tensile strength Rm N/mm²):820~1050

A % min:Long product::30

 

Form: rods

Thickness a or diameter(d:mm): d ≤25

Proof strength: Rp0,2N/mm² (min):415

Tensile strength Rm N/mm²):820~1050

A % minLong product::30

 

HB max.:240

 

Heat treatment

Symbol: +A(A = annealed)

Temperature(℃):950~1000

Type of cooling: water, air, cooling sufficiently rapid

Maximum application temperature Ta for air

Ta max(℃):1000

 

Creep properties

 

Estimated average value of the strength for rupture at elevated temperature

(Strength in N/mm2)

       Rupture in 1 000 h:

700℃:260

800℃:107

900℃:34

 

Rupture in 10 000 h:

700℃:190

800℃:63

900℃:20

 

 

Physical properties for the steels and nickel alloys

Density(kg/dm2):8.4

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

200℃:11.1

400℃:12.6

600℃:13.8

800℃:14.9

1000℃:15.8

Thermal conductivity

W/(m.K)

      at 20℃: 10

at 500℃:17

 

Specific heat capacity

kJ(kg.k)

        at 20℃:0.41

 

  Electrical resistivity

             Ω.mm²/m

       at 20℃:1.29

 MagnetizabilityParamagnetic

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