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UNS EV9 Details

Steel for exhaust valves

UNS EV9 Standard Download

EV9 Datasheet
UNS EV9

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EV9 Application:Steel for exhaust valves
Category Type Grade Designations
Grades Stainless Steels EV9 USA - UNS ,
Chemical composition(mass fraction)(wt.%)
Elements Min.（≥） Max.（≤） Similar Remarks
C 0.35 0.50
Si 0.30 0.80
Mn - 1.00
P - 0.045
S - 0.030
Cr 12.0 15.0
Ni 12.0 15.0
Mo 0.20 0.50
W 1.50 3.00
Mechanical properties of grade EV9
Proof strength
Rp0.2 (MPa)		 Tensile strength
Rm (MPa)		 Impact energy
KV (J)		 Elongation at fracture
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
195 (≥) 916 (≥) 41 33 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 212
Physical properties of grade EV9
Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm		 Modulus of elasticity
kN/mm2		 Expansion rate
455 (≥) 391 (≥) 12 33 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 131
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
417 977 518
EV9 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
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
EV9 UNS USA
Steel for exhaust valves
S63009 AISI USA
Steel for exhaust valves