EN 1.4438 (X2CrNiMo18-15-4) Stainless Steel

Austenitic & General Stainless Steels

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density7.9g/cm³

Elastic Modulus200GPa

Tensile Strength620MPa

Yield Strength220MPa

Brinell Hardness215HB

Maximum Service Temperature1000°C

Weight Calculator

Chemical Composition

0 to 0.030%

17.5 to 19.5%

13 to 16%

3.0 to 4.0%

0 to 2.0%

0 to 1.0%

0 to 0.1%

0 to 0.045%

0 to 0.015%

57.3 to 66.5%

Mechanical

A - Min. elongation at fracture (%) (+A)

35-40

A - Min. elongation at fracture (%) longitud., (+AT)

+AT

Elastic (Young's, Tensile) Modulus

200 GPa

Elongation at Break

41 %

Fatigue Strength

220 MPa

Impact Strength: V-Notched Charpy

90 J

KV - Impact energy (J) longitud., (+A)

+20° 100

KV - Impact energy (J) transverse, (+A)

+20° 60

KV - Impact energy (J) transverse, (+A)

-196° 60

Poisson's Ratio

0.28

R p0.2 0.2% proof strength (MPa) (+A)

200-240

R p0.2 0.2% proof strength (MPa) (+AT)

220

+AT

Rm - Tensile strength (MPa) (+A)

500-720

Rm - Tensile strength (MPa) (+AT)

490-690

+AT

Shear Modulus

79 GPa

Shear Strength

420 MPa

Tensile Strength: Ultimate (UTS)

620 MPa

Tensile Strength: Yield (Proof)

250 MPa

Hardness

Brinell Hardness

180

Brinell hardness (HB): (+A)

215

Brinell hardness (HB): (+AT)

200

+AT

Physical

Density

7.9 g/cm 3

Thermal

Latent Heat of Fusion

290 J/g

Maximum Temperature: Corrosion

420 °C

Maximum Temperature: Mechanical

1000 °C

Melting Completion (Liquidus)

1450 °C

Melting Onset (Solidus)

1400 °C

Specific Heat Capacity

470 J/kg-K

Thermal Conductivity

14 W/m-K

Thermal Diffusivity

3.7 mm 2 /s

Thermal Expansion

16 µm/m-K

Thermal Shock Resistance

14 points

Electrical

Electrical Conductivity: Equal Volume

2.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.3 % IACS

Calculated

PREN (Pitting Resistance)

Resilience: Ultimate (Unit Rupture Work)

200 MJ/m 3

Resilience: Unit (Modulus of Resilience)

150 kJ/m 3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

22 points

Strength to Weight: Bending

20 points

Environmental

Base Metal Price

22 % relative

Embodied Carbon

4.4 kg CO 2 /kg material

Embodied Energy

60 MJ/kg

Embodied Energy

60 MJ/kg 26 x 10 3 BTU/lb

Embodied Water

160 L/kg

Embodied Water

160 L/kg 20 gal/lb

Registered Designations & Aliases

1.44381.4438EN 1.4438 (X2CrNiMo18-15-4) Stainless SteelX2CrNiMo18-15-4X2CrNiMo18-15-4

Standards

EN 10028-7 EN 10028-7: 2007 Flat products made of steels for pressure purposes. Stainless steels

EN 10088-1 EN 10088-1: 2005 Stainless steels. List of stainless steels

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

EN 10088-2 EN 10088-2: 2005 Stainless steels. Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes

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

EN 10088-2 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

EN 10088-3 EN 10088-3: 2005 Stainless steels. Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes

EN 10088-3 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 10088-4 EN 10088-4: 2009 Stainless steels. Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes

EN 10088-5 EN 10088-5: 2009 Stainless steels. Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion resisting steels for construction purposes

EN 10217-7 EN 10217-7: 2005 Welded steel tubes for pressure purposes. Stainless steel tubes

EN 10253-3 EN 10253-3: 2008 Butt-welding pipe fittings. Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements

EN 10253-4 EN 10253-4: 2008 Butt-welding pipe fittings. Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements