UNS S44725 Stainless Steel
Ferritic Stainless Steels
Property Overview
Density7.7g/cm³
Elastic Modulus200GPa
Tensile Strength500MPa
Yield Strength310MPa
Brinell Hardness180HB
Maximum Service Temperature1100°C
Chemical Composition
C
0 to 0.015%
CR
25 to 28.5%
NI
0 to 0.3%
MO
1.5 to 2.5%
MN
0 to 0.4%
SI
0 to 0.040%
N
0 to 0.018%
P
0 to 0.040%
S
0 to 0.020%
NB
0 to 0.26%
TI
0 to 0.26%
FE
67.6 to 73.5%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
22 %
Fatigue Strength
210 MPa
Poisson's Ratio
0.27
Shear Modulus
81 GPa
Shear Strength
320 MPa
Tensile Strength: Ultimate (UTS)
500 MPa
Tensile Strength: Yield (Proof)
310 MPa
Hardness
Brinell Hardness
180
Rockwell B Hardness
84
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
290 J/g
Maximum Temperature: Corrosion
500 °C
Maximum Temperature: Mechanical
1100 °C
Melting Completion (Liquidus)
1450 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
17 W/m-K
Thermal Diffusivity
4.6 mm 2 /s
Thermal Expansion
11 µm/m-K
Thermal Shock Resistance
16 points
Electrical
Electrical Conductivity: Equal Volume
2.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.8 % IACS
Calculated
PREN (Pitting Resistance)
33
Resilience: Ultimate (Unit Rupture Work)
99 MJ/m 3
Resilience: Unit (Modulus of Resilience)
240 kJ/m 3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
18 points
Strength to Weight: Bending
18 points
Environmental
Base Metal Price
15 % relative
Embodied Carbon
3.1 kg CO 2 /kg material
Embodied Energy
44 MJ/kg
Embodied Energy
44 MJ/kg 19 x 10 3 BTU/lb
Embodied Water
170 L/kg
Embodied Water
170 L/kg 20 gal/lb
Registered Designations & Aliases
S44725UNS S44725 Stainless Steel
Standards
ASTM A240 ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
ASTM A240 ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012 Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011 Corrosion of Stainless Steels, A. John Sedriks, 1996