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UNS HNV8 Details

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HNV8 Application:Steel for intake valves

Category Type Grade Designations
Grades Stainless Steels HNV8 USA - UNS ,

Chemical composition(wt.%) of HNV8 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.20 0.25
Si - 0.50
Mn 0.50 1.00
P 0.040
S 0.025
Cr 11.0 12.5
Ni 0.50 1.00
Mo 0.90 1.25
W 0.90 1.25
Steel for intake valves

Mechanical properties of grade HNV8

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)
498 (≥) 262 (≥) 14 33 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 131

Physical properties of grade HNV8

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
353 (≥) 772 (≥) 34 43 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 123
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
451 391 716

HNV8 - 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
HNV8 UNS USA
Steel for intake valves
A 176 S42200 SAE USA
Stainless and Heat-Resisting Chromium Steel Plate, Sheet, and Strip
A 565 S42200 SAE USA
Martensitic Stainless Steel Bars for High-Temperature Service
S42200 AISI USA
Martensitic Chromium Molybdenum Nickel Wolfram Stainless Steel (422)
A 176 S42200 SAE USA
Stainless and Heat-Resisting Chromium Steel Plate, Sheet, and Strip
A 565 S42200 SAE USA
Martensitic Stainless Steel Bars for High-Temperature Service
S42200 AISI USA
Martensitic Chromium Molybdenum Nickel Wolfram Stainless Steel (422)
GH4220 GB China
Nickel-base superalloy
S42201 AISI USA
Martensitic Chromium Superstrength Steel
422 YB USA
Stainless and Heat-Resisting Chromium Steel Plate, Sheet, and Strip
422 YB USA
Martensitic Stainless Steel Bars for High-Temperature Service
422 YB USA
Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Relevant products

HNV8 Steel Stock

Steel grade Dimension Shape Unit Quantity Delivery state Query
Stainless Steel 422 / Alloy 422 AMS 5655 UNS S42200/616/B4B Round Bar Stock Select 0 Select Enquiry
SA-437 Grade B4B/SUS 616 /422 Forged Bar Dia.160xL Round Bar Kgs 2120 Forged+QT Enquiry

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