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UNS S44700 (29-4) Stainless Steel

Ferritic Stainless Steels

OverviewChemical CompositionMechanical PropertiesPhysical PropertiesOther Properties

Property Overview

Density7.8g/cm³
Elastic Modulus210GPa
Tensile Strength600MPa
Yield Strength450MPa
Brinell Hardness200HB
Maximum Service Temperature1100°C
Weight Calculator

Chemical Composition

C
0 to 0.010%
CR
28 to 30%
NI
0 to 0.15%
MO
3.5 to 4.2%
MN
0 to 0.3%
SI
0 to 0.2%
N
0 to 0.020%
P
0 to 0.025%
S
0 to 0.020%
CU
0 to 0.15%
FE
64.9 to 68.5%

Mechanical

Elastic (Young's, Tensile) Modulus
210 GPa
Elongation at Break
23 %
Fatigue Strength
300 MPa
Poisson's Ratio
0.27
Reduction in Area
45 %
Shear Modulus
82 GPa
Shear Strength
380 MPa
Tensile Strength: Ultimate (UTS)
600 MPa
Tensile Strength: Yield (Proof)
450 MPa

Hardness

Brinell Hardness
200
Rockwell C Hardness
17

Physical

Density
7.8 g/cm 3

Thermal

Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
460 °C
Maximum Temperature: Mechanical
1100 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
480 J/kg-K
Thermal Expansion
11 µm/m-K
Thermal Shock Resistance
19 points

Calculated

PREN (Pitting Resistance)
42
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m 3
Resilience: Unit (Modulus of Resilience)
480 kJ/m 3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
20 points

Environmental

Base Metal Price
18 % relative
Embodied Carbon
3.6 kg CO 2 /kg material
Embodied Energy
49 MJ/kg
Embodied Energy
49 MJ/kg 21 x 10 3 BTU/lb
Embodied Water
180 L/kg
Embodied Water
180 L/kg 22 gal/lb
Registered Designations & Aliases
29-4S44700UNS S44700 (29-4) 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 A479 ASTM A479: Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels

ASTM A493 ASTM A493: Standard Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging

ASTM A493 ASTM A493: Standard Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging ASTM A479: Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005 ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011 Properties and Selection: Irons, Steels and High Performance Alloys, ASM Handbook vol. 1, ASM International, 1993 Corrosion of Stainless Steels, A. John Sedriks, 1996

ASTM A959 ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels