UNS S21904 (XM-11) Stainless Steel

Austenitic & General Stainless Steels

Material conditionannealed

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density7.7g/cm³

Elastic Modulus200GPa

Tensile Strength700MPa

Yield Strength390MPa

Brinell Hardness210HB

Maximum Service Temperature980°C

Weight Calculator

Chemical Composition

0 to 0.040%

19 to 21.5%

5.5 to 7.5%

8.0 to 10%

0 to 1.0%

0.15 to 0.4%

0 to 0.045%

0 to 0.030%

59.5 to 67.4%

Mechanical

Elastic (Young's, Tensile) Modulus

200 GPa

Elongation at Break

51 %

Fatigue Strength

380 MPa

Poisson's Ratio

0.28

Reduction in Area

64 %

Shear Modulus

78 GPa

Shear Strength

510 MPa

Tensile Strength: Ultimate (UTS)

700 MPa

Tensile Strength: Yield (Proof)

390 MPa

Hardness

Brinell Hardness

210

Rockwell B Hardness

Physical

Density

7.7 g/cm 3

Thermal

Latent Heat of Fusion

290 J/g

Maximum Temperature: Corrosion

430 °C

Maximum Temperature: Mechanical

980 °C

Melting Completion (Liquidus)

1400 °C

Melting Onset (Solidus)

1350 °C

Specific Heat Capacity

480 J/kg-K

Thermal Conductivity

14 W/m-K

Thermal Diffusivity

3.8 mm 2 /s

Thermal Expansion

17 µm/m-K

Thermal Shock Resistance

15 points

Electrical

Electrical Conductivity: Equal Volume

2.5 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.9 % IACS

Calculated

PREN (Pitting Resistance)

Resilience: Ultimate (Unit Rupture Work)

310 MJ/m 3

Resilience: Unit (Modulus of Resilience)

380 kJ/m 3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

25 points

Strength to Weight: Bending

23 points

Environmental

Base Metal Price

15 % relative

Embodied Carbon

3.0 kg CO 2 /kg material

Embodied Energy

43 MJ/kg

Embodied Energy

43 MJ/kg 19 x 10 3 BTU/lb

Embodied Water

160 L/kg

Embodied Water

160 L/kg 19 gal/lb

Registered Designations & Aliases

S21904UNS S21904 (XM-11) Stainless SteelXM-11

Standards

ASTM A182 ASTM A182: Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service

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 A473 ASTM A473: Standard Specification for Stainless Steel Forgings

ASTM A473 ASTM A473: Standard Specification for Stainless Steel Forgings ASTM A479: Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels ASTM A666: Standard Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat Bar ASTM A182: Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service 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 ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

ASTM A479 ASTM A479: Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels

ASTM A666 ASTM A666: Standard Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat Bar

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