UNI 1.4021 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country/Standard: Italy / UNI

Data updates

Latest Update: 2025-03

Total number of updates: 16

Update History

2024-12 2024-03 2021-10 2021-02 2021-01 2020-12 2020-03 2020-02 2019-09 2019-06 2017-01 2016-11 2015-02 2015-01 2014-04

This material has 1512 properties — only a subset is shown here.

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UNI 1.4021 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.16 – 0.25

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 1.4021 Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 220 GPa

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Shear Modulus

val1 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

24.6 — 30 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

0.587 — 0.6 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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This material has 1512 properties — only a subset is shown here.

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UNI 1.4021 Heat Treatments

Hot formed at 1100-800°C, slow cooled.
A: annealed at 750-850°C.
QT700: quenched at 950-1050°C, oil or air cooled. Tempered at 650-750°C.
QT800: quenched at 950-1050°C, oil or air cooled. Tempered at 600-700°C.
Hot forming: 1100-800°C, slow cooling; Annealing (+A): 745-825°C, air cooling; Quenching (+QT700): 950-1050°C, oil or air cooling; (If heat treatment is carried out in a continuous furnace, the upper part of the range specified should usually be preferred, or even exceeded); Tempering: 650-750°C; Quenching (+QT800): 950-1050°C, oil or air cooling; (If heat treatment is carried out in a continuous furnace, the upper part of the range specified should usually be preferred, or even exceeded); Tempering: 600-700°C.

UNI 1.4021 Mechanical Properties

Temperature

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

≤ 290

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Rockwell Hardness (HR)

val1

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Vickers Hardness (HV)

val1

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604 Cross References

42 Composition
227 Mechanical Properties
102 Physical Properties
11 Heat Treatment
6 Metallography
1 Machinability

42 Stress-Strain
12 Formability
12 Fatigue
- Fracture
- Creep

6 Joints
- Coatings
4 Dimensions
- Tribology

1 Corrosion
- Ageing
- Weatherability
- Irradiation

442 Total Suppliers