GBT 8Cr20Si2Ni

Location » Home » Grades > Special Alloy > 8Cr20Si2Ni

Grades | Special Alloy | 8Cr20Si2Ni

GBT 8Cr20Si2Ni

Print

8Cr20Si2Ni Application:Chinese GB standard of internal combustion engine valve steel bar (GB/T 12773-1991)

Chemical composition(mass fraction)(wt.%) of the 8Cr20Si2Ni
C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%)
0.75-0.85 1.75-2.25 0.20-0.60 0.03 0.03 19.0-20.5 1.15-1.65

Mechanical properties of grade 8Cr20Si2Ni

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition HBW
878 (≥) 321 (≥) 11 32 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical properties of grade 8Cr20Si2Ni

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
781 (≥) 745 (≥) 11 44 43 Solution and Aging, Annealing, Ausaging, Q+T,etc
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
- - -
383 185 484 - - -

8Cr20Si2Ni Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED