UNI 1.4404 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country/Standard: Italy / UNI

Data updates

Latest Update: 2026-03

Total number of updates: 20

Update History

2025-11 2025-10 2025-03 2024-12 2024-09 2024-04 2024-03 2024-02 2021-06 2019-09 2018-01 2017-06 2016-11 2016-10 2016-08 2016-05 2015-03 2015-02 2014-04

This material has 2921 properties — only a subset is shown here.

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UNI 1.4404 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.030

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

16.5 – 18.5

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 2.00

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7727-37-9; 17778-88-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

EN 10088-3: 2023 / Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resistant steels for general purposes

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UNI 1.4404 Physical Properties

Temperature

0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 215 GPa

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Density

val1 kg/dm³

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Poisson Coefficient

val1

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Coefficient of Thermal Expansion (CTE)

val1 10^-6/°C

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Thermal Conductivity

15 — 16.3 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

0.75 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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Melting Temperature

val1 °C

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This material has 2921 properties — only a subset is shown here.

Unlock detailed physical values across temperatures and conditions.

UNI 1.4404 Heat Treatments

(+AT) Solution annealed: 1020-1120°C, cooled sufficiently rapid in air or water.
Solution annealed (+AT): 1020-1120°C (for guidance only), cooling sufficiently rapid in water or air.

UNI 1.4404 Mechanical Properties

Temperature

≤ 0°C 0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Yield Strength, Rp0.2

val1 MPa

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Yield Strength, Rp1

val1 MPa

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Tensile Strength

val1 MPa

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Elongation, A

val1 %

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Reduction of Area

val1 %

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Impact Energy

val1 J

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Brinell Hardness (HB)

≤ 215

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1070 Cross References

172 Composition
490 Mechanical Properties
43 Physical Properties
14 Heat Treatment
3 Metallography
1 Machinability

46 Stress-Strain
- Formability
1 Fatigue
- Fracture
- Creep

177 Joints
- Coatings
160 Dimensions
- Tribology

2 Corrosion
- Ageing
- Weatherability
- Irradiation

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