EN 1.7375 (12CrMo9-10) Chromium-Molybdenum Steel
Other Steels
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength620MPa
Yield Strength355MPa
Brinell Hardness180HB
Maximum Service Temperature460°C
Chemical Composition
C
0.1 to 0.15%
CR
2.0 to 2.5%
NI
0 to 0.3%
MO
0.9 to 1.1%
MN
0.3 to 0.8%
SI
0 to 0.3%
N
0 to 0.012%
P
0 to 0.015%
S
0 to 0.010%
CU
0 to 0.25%
AL
0.010 to 0.040%
FE
94.5 to 96.7%
Mechanical
A - Min. elongation at fracture (%) (+NT)
18
+NT
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
20 %
Fatigue Strength
270 MPa
Impact Strength: V-Notched Charpy
80 J
KV - Impact energy (J) transverse, (+NT)
-20° 27
+NT
KV - Impact energy (J) transverse, (+NT)
0° 40
+NT
KV - Impact energy (J) transverse, (+NT)
+20° 70
+NT
Poisson's Ratio
0.29
ReH - Minimum yield strength (MPa) (+NT)
355
+NT
Rm - Tensile strength (MPa) (+NT)
540-690
+NT
Shear Modulus
74 GPa
Shear Strength
380 MPa
Tensile Strength: Ultimate (UTS)
620 MPa
Tensile Strength: Yield (Proof)
400 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
180
Physical
Density
7.9 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
460 °C
Melting Completion (Liquidus)
1470 °C
Melting Onset (Solidus)
1430 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
39 W/m-K
Thermal Diffusivity
11 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
18 points
Electrical
Electrical Conductivity: Equal Volume
7.6 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.7 % IACS
Other
Nominal thickness (mm):
to 250
Calculated
PREN (Pitting Resistance)
5.6
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m 3
Resilience: Unit (Modulus of Resilience)
420 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
22 points
Strength to Weight: Bending
20 points
Environmental
Base Metal Price
3.9 % relative
Embodied Carbon
1.8 kg CO 2 /kg material
Embodied Energy
23 MJ/kg
Embodied Energy
23 MJ/kg 9.9 x 10 3 BTU/lb
Embodied Water
59 L/kg
Embodied Water
59 L/kg 7.1 gal/lb
Registered Designations & Aliases
1.73751.737512CrMo9-1012CrMo9-10EN 1.7375 (12CrMo9-10) Chromium-Molybdenum Steel
Standards
EN 10028-2 EN 10028-2: 2009 Flat products made of steels for pressure purposes. Non-alloy and alloy steels with specified elevated temperature properties
EN 10028-2 EN 10028-2: Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties
EN 10028-2 EN 10028-2: Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties Creep-Resistant Steels, Fujio Abe et al. (editors), 2008