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UNS HEV3 Details

HEV3 Application:Steel for exhaust valves

Category Type Grade Designations
Grades Stainless Steels - Special Steels HEV3 USA - UNS ,

Chemical composition(wt.%) of HEV3 grade:

Elements Min.(≥) Max.(≤)
C 0.03 0.10
Si - 0.50
Mn - 0.50
P - 0.015
S - 0.015
Cr 14.0 17.0
Ni - remaining
Mo - 0.50
Steel for exhaust valves

Mechanical properties of grade HEV3

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)
146 (≥) 459 (≥) 33 44 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical properties of grade HEV3

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
869 (≥) 292 (≥) 31 22 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 113
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
622 597 553

HEV3 - Form of Supply

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
HEV3 UNS USA
Steel for exhaust valves
N07751 AISI USA
Steel for exhaust valves

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