Grades | Stainless Steels | EV4

UNS EV4

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EV4 Application:Steel for exhaust valves

Chemical composition(mass fraction)(wt.%) of the EV4
Elements Min.(≥) Max.(≤) Similar Remarks
C 0.15 0.25
Si 0.70 1.00
Mn 1.00 1.50
P - 0.045
S - 0.030
Cr 20.0 22.0
Ni 10.5 12.5
N 0.15 0.20

Mechanical properties of grade EV4

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition HBW
137 (≥) 723 (≥) 31 43 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 132

Physical properties of grade EV4

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
881 (≥) 554 (≥) 24 23 34 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
- - -
496 783 185 - - -

EV4 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