X12NiCrSi35-16 1.4864 BS-EN-10095-1999

X12NiCrSi35-16 1.4864 BS-EN-10095-1999

Austenitic heat-resisting steels

Steel designation

NameX12NiCrSi35-16

Number1.4864

X12NiCrSi35-16 1.4864  Chemical composition

Cmax.0.15

Si: 1.00~2.00

Mn(max):2.00

P(max):0.045

S(max):0.015

Cr:15.00~17.00

Ni:33.00~37.00

N:. max.0.11

X12NiCrSi35-16 1.4864  Mechanical properties at room temperature

Form: bars

Thickness a or diameter(d:mm): a ≤160

HB max.:223

Proof strength: Rp0,2N/mm² (min):230

Rp1,0N/mm²(min):270

Tensile strength Rm N/mm²):550~750

A % min

Long product:30

Flat products:(1)0,5≤a<3:(1,tr):28   (2)3 < a  (1|tr): 30

Heat treatment

Symbol: +AT (A T=solution annealed)

Temperature(℃):1020~1120

Type of cooling: water, air, cooling sufficiently rapid

Maximum application temperature Ta for air

Ta max(℃):1100

(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 1 % elongation at elevated temperature (Strength in N/mm2)

Elongation 1 % in 1 000 h:

600℃:105

700℃:50

800℃:25

900℃:12

 

Elongation 1 % in 10 000 h:

600℃:80

700℃:35

800℃:15

900℃:5

 

Elongation 1 % in 100 000 h:

600℃:40

700℃:14

800℃:4

900℃:1.5

 

 

Estimated average value of the strength for rupture at elevated temperature

(Strength in N/mm2)

       Rupture in 1 000 h:

600℃:180

700℃:75

800℃:35

900℃:15

 

Rupture in 10 000 h:

600℃:125

700℃:45

800℃:20

900℃:8

 

Rupture in 100 000 h:

600℃:75

700℃:25

800℃:7

900℃:3

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℃:15.0

400℃:16.0

600℃:17.0

800℃:17.5

1000℃:18.5

Thermal conductivity

W/(m.K)

      at 20℃: 12.5

at 500℃:17

 

Specific heat capacity

kJ(kg.k)

        at 20℃:0.55

 

  Electrical resistivity

             Ω.mm²/m

       at 20℃:1.0

 Magnetizability:no (slightly magnetic when cold worked)

Learn more