UNI 1.4306 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country/Standard: Italy / UNI

Data updates

Latest Update: 2026-02

Total number of updates: 23

Update History

2025-10 2024-09 2024-03 2021-09 2021-07 2021-02 2020-12 2020-03 2020-02 2019-09 2019-08 2019-05 2018-04 2018-01 2017-06 2016-11 2016-10 2016-08 2016-05 2015-03 2015-02 2014-04

This material has 2661 properties — only a subset is shown here.

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UNI 1.4306 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.030

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

18.0 – 20.0

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 2.00

UNIT

CAS NUMBER

7439-96-5

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 10088-1: 2023 / Stainless steels - Part 1: List of stainless steels

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UNI 1.4306 Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 215 GPa

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Dynamic Modulus of Elasticity

val1 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

13.9 — 15 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

0.73 — 0.735 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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This material has 2661 properties — only a subset is shown here.

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UNI 1.4306 Heat Treatments

Solution annealed (+AT): 1000-1100°C (for guidance only), cooling sufficiently rapid in water or air.
Hot forming: 1150-850°C, air cooling;
+AT - Solution annealing: 1000-1100°C (If heat treatment is carried out in a continuous furnace, the upper part of the range specified should usually be preferred, or even exceeded). (The lower end of the range specified for solution annealing should be aimed at the heat treatment as part of further processing, because otherwise the mechanical properties might be affected. If the temperature of hot forming does not drop below the lower temperature for solution annealing, a temperature of 980°C is adequate as a lower limit for Mo-free steels, a temperature of 1000°C for steels with Mo contents up to 3 % and a temperature of 1020°C for steels with Mo contents exceeding 3 %), air or water cooling; Cooling sufficiently rapidly in order to avoid the occurrence of intergranular corrosion.

UNI 1.4306 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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913 Cross References

137 Composition
460 Mechanical Properties
94 Physical Properties
13 Heat Treatment
2 Metallography
1 Machinability

41 Stress-Strain
- Formability
20 Fatigue
- Fracture
- Creep

161 Joints
- Coatings
153 Dimensions
- Tribology

2 Corrosion
- Ageing
- Weatherability
- Irradiation

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