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55NiCr12 Application:Spain structural alloy steel
Category Type Steel grade Standard Country
Grades Special Alloy 55NiCr12 UNE Spain

Chemical composition % of the ladle analysis of grade 55NiCr12

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%)
0.50-0.60 0.10-0.40 0.35-0.65 0.025 0.020 0.90-1.20 2.80-3.20
S5NiCr12
Mechanical properties of grade 55NiCr12
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)
671 (≥) 433 (≥) 32 14 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 112
Physical properties of grade 55NiCr12
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
324 (≥) 372 (≥) 43 33 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 323
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
135 896 357
55NiCr12 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

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