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DIN 1.8550 Details

1.8550 Application:Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels,

Category Type Grade Designations
Grades Stainless Steels 1.8550 Germany - DIN , DIN EN 10085 - Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels,

Chemical composition(wt.%) of 1.8550 grade: DIN EN 10085

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.30 0.37
Si - 0.40
Mn 0.40 0.70
P - 0.025
S - 0.035
Al 0.80 1.20
Cr 1.50 1.80
Mo 0.15 0.25
Ni 0.85 1.15
Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels, rings

Mechanical properties of grade 1.8550 DIN EN 10085

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)
173 (≥) 831 (≥) 43 41 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical properties of grade 1.8550 DIN EN 10085

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
734 (≥) 833 (≥) 12 12 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 432
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
597 514 924

1.8550 - 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
34CrAlNi7 DIN Germany
Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels,
1.8550 DIN Germany
Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels,
V820 DIN Germany
Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels,

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