AFNOR 2.4955

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AFNOR 2.4955

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2.4955 Application:Valve Internal Combustion Engines steel (NF-EN 1009-1998)

Chemical composition(mass fraction)(wt.%) of the 2.4955
C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) B(%) Nb(%) Al(%) Ti(%) Other(%)
0.04-0.10 Max 1.00 Max 1.00 Max 0.030 Max 0.015 18.0-21.0 Remain Max 0.008 Nb+Ta 1.0-2.0 0.30-1.00 1.0-2.0 Fe 23.0-28.0

Mechanical properties of grade 2.4955

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition HBW
548 (≥) 841 (≥) 11 44 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical properties of grade 2.4955

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm
872 (≥) 432 (≥) 41 41 33 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		 - - -
338 645 334 - - -

2.4955 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