EN 1.8550 (34CrAlNi7-10) Nitriding Steel
Other Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength1000MPa
Yield Strength680MPa
Brinell Hardness248HB
Maximum Service Temperature440°C
Chemical Composition
C
0.3 to 0.37%
CR
1.5 to 1.8%
NI
0.85 to 1.2%
MO
0.15 to 0.25%
MN
0.4 to 0.7%
SI
0 to 0.4%
P
0 to 0.025%
S
0 to 0.035%
AL
0.8 to 1.2%
FE
94.4 to 96.3%
Mechanical
A - Min. elongation at fracture (%) (+QT)
10
+QT
A - Min. elongation at fracture (%) (+QT)
12
+QT
A - Min. elongation at fracture (%) (+QT)
13
+QT
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
11 %
Fatigue Strength
470 MPa
Impact Strength: V-Notched Charpy
34 J
KV - Impact energy (J) (+QT)
+20° 30-35
+QT
Poisson's Ratio
0.29
R p0.2 0.2% proof strength (MPa) (+QT)
680
+QT
R p0.2 0.2% proof strength (MPa) (+QT)
650
+QT
R p0.2 0.2% proof strength (MPa) (+QT)
600
+QT
Rm - Tensile strength (MPa) (+QT)
900-1100
+QT
Rm - Tensile strength (MPa) (+QT)
850-1050
+QT
Rm - Tensile strength (MPa) (+QT)
800-1000
+QT
Shear Modulus
73 GPa
Shear Strength
600 MPa
Tensile Strength: Ultimate (UTS)
1000 MPa
Tensile Strength: Yield (Proof)
760 MPa
Hardness
+A Soft annealed +AC Annealed to achieve spheroidization of the carbides +AR As rolled +AT Solution annealed +C Cold drawn / hard +CR Cold rolled +FP Treated to ferrite-pearlite structure and hardness range +I Isothermal annealing +LC Cold drawn / soft +M Thermo mechanical rolling +N Normalized +NT Normalized and tempered
+P Precipitation hardened +PE Peeled +QA Air quenched and tempered +QL Liquid quenched and tempered +QT Quenched and tempered +S Treated to improve shearability +SH As rolled and turned +SR Cold drawn and stress relieved +T Tempered +TH Treated to hardness range +WW Warm worked +U Untreated
+A
Brinell Hardness
300
Brinell hardness (HB): (+A)
248
+A
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
440 °C
Melting Completion (Liquidus)
1450 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
40 W/m-K
Thermal Diffusivity
11 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
29 points
Electrical
Electrical Conductivity: Equal Volume
7.6 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.8 % IACS
Other
Nominal thickness (mm):
16 - 40
Nominal thickness (mm):
40 - 100
Nominal thickness (mm):
100 - 160
Nominal thickness (mm):
160 - 250
Calculated
PREN (Pitting Resistance)
2.3
Resilience: Ultimate (Unit Rupture Work)
100 MJ/m 3
Resilience: Unit (Modulus of Resilience)
1550 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
36 points
Strength to Weight: Bending
29 points
Environmental
Base Metal Price
3.4 % relative
Embodied Carbon
1.7 kg CO 2 /kg material
Embodied Energy
23 MJ/kg
Embodied Energy
23 MJ/kg 9.8 x 10 3 BTU/lb
Embodied Water
67 L/kg
Embodied Water
67 L/kg 8.0 gal/lb
Registered Designations & Aliases
1.85501.855034CrAlNi7-1034CrAlNi7-10EN 1.8550 (34CrAlNi7-10) Nitriding Steel
Standards
EN 10085 EN 10085: 2001 Nitriding steel. Technical delivery conditions
ISO 683-5 ISO 683-5: Heat treatable steels, alloy steels and free-cutting steels - Part 5: Nitriding steels
ISO 683-5 ISO 683-5: Heat treatable steels, alloy steels and free-cutting steels - Part 5: Nitriding steels Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005