EN 1.4971 (X12CrCoNi21-20) Stainless Steel
Other Steels
Property Overview
Density8.4g/cm³
Elastic Modulus210GPa
Tensile Strength800MPa
Yield Strength300MPa
Brinell Hardness240HB
Maximum Service Temperature1100°C
Chemical Composition
C
0.080 to 0.16%
CR
20 to 22.5%
NI
19 to 21%
MO
2.5 to 3.5%
MN
0 to 2.0%
SI
0 to 1.0%
N
0.1 to 0.2%
P
0 to 0.035%
S
0 to 0.015%
NB
0.75 to 1.3%
CO
18.5 to 21%
W
2.0 to 3.0%
FE
24.3 to 37.1%
Mechanical
A - Min. elongation at fracture (%) (+AT)
30-35
+AT
Elastic (Young's, Tensile) Modulus
210 GPa
Elongation at Break
34 %
Fatigue Strength
270 MPa
Poisson's Ratio
0.29
R p0.2 0.2% proof strength (MPa) (+AT)
300
+AT
Rm - Tensile strength (MPa) (+AT)
690-900
+AT
Shear Modulus
81 GPa
Shear Strength
530 MPa
Tensile Strength: Ultimate (UTS)
800 MPa
Tensile Strength: Yield (Proof)
340 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
240
Physical
Density
8.4 g/cm 3
Thermal
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
570 °C
Maximum Temperature: Mechanical
1100 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
450 J/kg-K
Thermal Conductivity
13 W/m-K
Thermal Diffusivity
3.4 mm 2 /s
Thermal Expansion
15 µm/m-K
Thermal Shock Resistance
19 points
Calculated
PREN (Pitting Resistance)
38
Resilience: Ultimate (Unit Rupture Work)
220 MJ/m 3
Resilience: Unit (Modulus of Resilience)
280 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
26 points
Strength to Weight: Bending
23 points
Environmental
Base Metal Price
70 % relative
Embodied Carbon
7.6 kg CO 2 /kg material
Embodied Energy
110 MJ/kg
Embodied Energy
110 MJ/kg 46 x 10 3 BTU/lb
Embodied Water
300 L/kg
Embodied Water
300 L/kg 35 gal/lb
Registered Designations & Aliases
1.49711.4971EN 1.4971 (X12CrCoNi21-20) Stainless SteelX12CrCoNi21-20X12CrCoNi21-20
Standards
EN 10088-1 EN 10088-1: 2005 Stainless steels. List of stainless steels
EN 10088-1 EN 10088-1: Stainless steels - Part 1: List of stainless steels
EN 10302 EN 10302: 2008 Creep resisting steels, nickel and cobalt alloys
EN 10302 EN 10302: Creep resisting steels, nickel and cobalt alloys
EN 10302 EN 10302: Creep resisting steels, nickel and cobalt alloys EN 10088-1: Stainless steels - Part 1: List of stainless steels Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012