EN 1.7228 (50CrMo4) Chromium-Molybdenum Steel
Other Steels
Property Overview
Density7.8g/cm³
Elastic Modulus190GPa
Tensile Strength750MPa
Yield Strength550MPa
Brinell Hardness248HB
Maximum Service Temperature420°C
Chemical Composition
C
0.46 to 0.54%
CR
0.9 to 1.2%
MO
0.15 to 0.3%
MN
0.5 to 0.8%
SI
0 to 0.4%
P
0 to 0.035%
S
0 to 0.035%
FE
96.7 to 98%
Mechanical
A - Min. elongation Lo = 5,65 √ So (%) (+QT), round products
9
+QT
A - Min. elongation Lo = 5,65 √ So (%) (+QT), round products
10
+QT
A - Min. elongation Lo = 5,65 √ So (%) (+QT), round products
12
+QT
A - Min. elongation Lo = 5,65 √ So (%) (+QT), round products
13
+QT
A - Min. elongation at fracture (%) transverse, (+QT)
9-11
+QT
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
12 %
Fatigue Strength
390 MPa
Impact Strength: V-Notched Charpy
22 J
Poisson's Ratio
0.29
Re - Upper yield strength (MPa) (+QT)
550
+QT
Re - Upper yield strength (MPa) (+QT)
540
+QT
Re - Upper yield strength (MPa) (+QT)
490
+QT
Re - Upper yield strength or R p0.2 - 0.2% proof strength (MPa) (+QT)
900
+QT
Re - Upper yield strength or R p0.2 - 0.2% proof strength (MPa) (+QT)
780
+QT
Re - Upper yield strength or R p0.2 - 0.2% proof strength (MPa) (+QT)
700
+QT
Re - Upper yield strength or R p0.2 - 0.2% proof strength (MPa) (+QT)
650
+QT
Re - Upper yield strength or R p0.2 - 0.2% proof strength (MPa) (+QT)
550
+QT
Rm - Tensile strength (MPa) (+QT)
1100-1300
+QT
Rm - Tensile strength (MPa) (+QT)
1000-1200
+QT
Rm - Tensile strength (MPa) (+QT)
900-1100
+QT
Rm - Tensile strength (MPa) (+QT)
850-1000
+QT
Rm - Tensile strength (MPa) (+QT)
750-950
+QT
Rm - Tensile strength (MPa) (+QT)
750
+QT
Rm - Tensile strength (MPa) (+QT)
700
+QT
Shear Modulus
73 GPa
Shear Strength
540 MPa
Tensile Strength: Ultimate (UTS)
900 MPa
Tensile Strength: Yield (Proof)
630 MPa
Hardness
Brinell Hardness
270
Brinell hardness (HBW): (+A)
248
+A
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
420 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
46 W/m-K
Thermal Diffusivity
12 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
26 points
Electrical
Electrical Conductivity: Equal Volume
7.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.4 % IACS
Other
Nominal diameter (mm):
to 16
Nominal diameter (mm):
16 - 40
Nominal diameter (mm):
40 - 100
Nominal diameter (mm):
100 - 160
Nominal diameter (mm):
160 - 250
Nominal diameter (mm):
250 - 330
Nominal diameter (mm):
330 - 500
Nominal diameter(mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160;
to 16
Nominal diameter(mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160;
16 - 40
Nominal diameter(mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160;
40 - 100
Nominal diameter(mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160;
100 - 160
Nominal diameter(mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160;
160 - 250
Nominal thickness (mm):
to 16
Nominal thickness (mm):
16 - 40
Nominal thickness (mm):
40 - 100
Nominal thickness (mm):
100 - 160
Nominal thickness (mm):
160 - 250
Nominal thickness(mm):
to 160
Nominal thickness(mm):
160 - 330
Nominal thickness(mm):
330 - 500
Calculated
Resilience: Ultimate (Unit Rupture Work)
100 MJ/m 3
Resilience: Unit (Modulus of Resilience)
1050 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
32 points
Strength to Weight: Bending
26 points
Environmental
Base Metal Price
2.5 % relative
Embodied Carbon
1.5 kg CO 2 /kg material
Embodied Energy
20 MJ/kg
Embodied Energy
20 MJ/kg 8.6 x 10 3 BTU/lb
Embodied Water
51 L/kg
Embodied Water
51 L/kg 6.1 gal/lb
Registered Designations & Aliases
1.72281.722850CrMo450CrMo4EN 1.7228 (50CrMo4) Chromium-Molybdenum Steel
Standards
EN 10083-3 EN 10083-3: 2006 Steels for quenching and tempering. Technical delivery conditions for alloy steels
EN 10250-3 EN 10250-3: 2000 Open steel die forgings for general engineering purposes. Alloy special steels
EN 10250-3 EN 10250-3: Open die steel forgings for general engineering purposes - Part 3: Alloy special steels
EN 10250-3 EN 10250-3: Open die steel forgings for general engineering purposes - Part 3: Alloy special steels Welding Metallurgy, 2nd ed., Sindo Kou, 2003