UNS S44800 (29-4-2) Stainless Steel

Ferritic Stainless Steels

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density7.8g/cm³

Elastic Modulus210GPa

Tensile Strength590MPa

Yield Strength450MPa

Brinell Hardness190HB

Maximum Service Temperature1100°C

Weight Calculator

Chemical Composition

0 to 0.010%

28 to 30%

2.0 to 2.5%

3.5 to 4.2%

0 to 0.3%

0 to 0.2%

0 to 0.020%

0 to 0.025%

0 to 0.020%

0 to 0.15%

62.6 to 66.5%

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

370 MPa

Tensile Strength: Ultimate (UTS)

590 MPa

Tensile Strength: Yield (Proof)

450 MPa

Hardness

Brinell Hardness

190

Rockwell C Hardness

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 Conductivity

17 W/m-K

Thermal Diffusivity

4.6 mm 2 /s

Thermal Expansion

11 µm/m-K

Thermal Shock Resistance

19 points

Electrical

Electrical Conductivity: Equal Volume

2.6 % IACS

Electrical Conductivity: Equal Weight (Specific)

3.0 % IACS

Calculated

PREN (Pitting Resistance)

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

19 % relative

Embodied Carbon

3.8 kg CO 2 /kg material

Embodied Energy

52 MJ/kg

Embodied Energy

52 MJ/kg 22 x 10 3 BTU/lb

Embodied Water

190 L/kg

Embodied Water

190 L/kg 22 gal/lb

Registered Designations & Aliases

29-4-2S44800UNS S44800 (29-4-2) 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 Corrosion of Stainless Steels, A. John Sedriks, 1996

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