MakeItFrom.com
Menu (ESC)

EN 1.4305 (X8CrNiS18-9) Stainless Steel

EN 1.4305 stainless steel is an austenitic stainless steel formulated for primary forming into wrought products. 1.4305 is the EN numeric designation for this material. X8CrNiS18-9 is the EN chemical designation.

It has a moderately low embodied energy among the wrought austenitic stainless steels in the database.

The properties of EN 1.4305 stainless steel include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.4305 stainless steel to: wrought austenitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Brinell Hardness

200 to 270

Elastic (Young's, Tensile) Modulus

200 GPa 28 x 106 psi

Elongation at Break

14 to 40 %

Fatigue Strength

190 to 330 MPa 27 to 47 x 103 psi

Poisson's Ratio

0.28

Shear Modulus

77 GPa 11 x 106 psi

Shear Strength

420 to 550 MPa 60 to 79 x 103 psi

Tensile Strength: Ultimate (UTS)

610 to 900 MPa 88 to 130 x 103 psi

Tensile Strength: Yield (Proof)

220 to 570 MPa 31 to 83 x 103 psi

Thermal Properties

Latent Heat of Fusion

290 J/g

Maximum Temperature: Corrosion

410 °C 780 °F

Maximum Temperature: Mechanical

930 °C 1700 °F

Melting Completion (Liquidus)

1420 °C 2590 °F

Melting Onset (Solidus)

1380 °C 2510 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

15 W/m-K 8.7 BTU/h-ft-°F

Thermal Expansion

16 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

2.4 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.7 % IACS

Otherwise Unclassified Properties

Base Metal Price

15 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

3.0 kg CO2/kg material

Embodied Energy

42 MJ/kg 18 x 103 BTU/lb

Embodied Water

140 L/kg 17 gal/lb

Common Calculations

PREN (Pitting Resistance)

19

Resilience: Ultimate (Unit Rupture Work)

110 to 190 MJ/m3

Resilience: Unit (Modulus of Resilience)

120 to 830 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

22 to 32 points

Strength to Weight: Bending

20 to 27 points

Thermal Diffusivity

4.0 mm2/s

Thermal Shock Resistance

14 to 20 points

Alloy Composition

Among wrought stainless steels, the composition of EN 1.4305 stainless steel is notable for including copper (Cu). Copper is used to improve resistance to acids, and to improve formability.

Iron (Fe) 66.4 to 74.9
Chromium (Cr) 17 to 19
Nickel (Ni) 8.0 to 10
Manganese (Mn) 0 to 2.0
Silicon (Si) 0 to 1.0
Copper (Cu) 0 to 1.0
Sulfur (S) 0.15 to 0.35
Carbon (C) 0 to 0.1
Nitrogen (N) 0 to 0.1
Phosphorus (P) 0 to 0.045

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

EN 10088-2: Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes

EN 10088-3: Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes

EN 10088-1: Stainless steels - Part 1: List of stainless steels

Corrosion of Austenitic Stainless Steels: Mechanism, Mitigation and Monitoring, H. S. Khatak and B. Raj (editors), 2002

Austenitic Stainless Steels: Microstructure and Mechanical Properties, P. Marshall, 1984

Corrosion of Stainless Steels, A. John Sedriks, 1996

Advances in Stainless Steels, Baldev Raj et al. (editors), 2010