UNI 1.4028 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country/Standard: Italy / UNI

Data updates

Latest Update: 2025-03

Total number of updates: 18

Update History

2024-12 2024-11 2024-03 2023-12 2022-09 2022-01 2021-10 2020-12 2020-03 2020-02 2019-03 2017-01 2016-11 2015-03 2015-02 2015-01 2014-04

This material has 1196 properties — only a subset is shown here.

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UNI 1.4028 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.26 – 0.36

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

12.0 – 14.0

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 1.50

UNIT

CAS NUMBER

7439-96-5

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 1.4028 Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 220 GPa

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Density

val1 kg/dm³

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Poisson Coefficient

val1

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Thermal Conductivity

30 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

0.65 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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This material has 1196 properties — only a subset is shown here.

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UNI 1.4028 Heat Treatments

Hot formed at 1100-800°C, slow cooled.
A: Annealed at 750-850°C.
QT850: Quenched at 950-1050°C, oil or air cooled. Tempered at 625-675°C.
Hot forming: 1100-800°C, slow cooling.
A - Annealing: 730-790°C;
QT - Quenching: 950-1050°C, air or oil cooling; Tempering: 200-350°C
QT800 - Quenching: 950-1010°C, air or oil cooling; Tempering: 650-730°C

UNI 1.4028 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Yield Strength, Rp0.2

val1 MPa

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Tensile Strength

500 — 2100 MPa

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Elongation, A

7 %

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Reduction of Area

val1 %

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Impact Energy

val1 J

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Brinell Hardness (HB)

≤ 305

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Rockwell Hardness (HR)

val1

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Vickers Hardness (HV)

val1

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584 Cross References

30 Composition
101 Mechanical Properties
20 Physical Properties
9 Heat Treatment
3 Metallography
1 Machinability

13 Stress-Strain
- Formability
- Fatigue
- Fracture
- Creep

4 Joints
- Coatings
4 Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

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