UNI 1.4057 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country/Standard: Italy / UNI

Data updates

Latest Update: 2026-02

Total number of updates: 16

Update History

2025-11 2025-06 2024-05 2024-03 2023-12 2022-10 2021-10 2020-03 2019-09 2019-08 2017-09 2016-10 2015-03 2015-01 2014-04

This material has 1030 properties — only a subset is shown here.

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UNI 1.4057 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.12 – 0.22

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

15.0 – 17.0

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 1.50

UNIT

CAS NUMBER

7439-96-5

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 1.4057 Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 216 GPa

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Shear Modulus

val1 GPa

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Density

val1 kg/dm³

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Poisson Coefficient

val1

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Thermal Conductivity

25 — 25.1 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

0.7 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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This material has 1030 properties — only a subset is shown here.

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UNI 1.4057 Heat Treatments

A: Annealed at 600-800°C, furnace or air cooled.
QT800: Quenched at 1020-1080°C, oil cooled. Tempered at (580-630°C) + (550-650°C).
QT900: Quenched at 1020-1080°C, oil cooled. Tempered at (540-600°C) + (520-640°C).
Hot forming: 1100-800°C, slow cooling; Annealing (+A) (Double annealing might be advisable): 680-800°C, air or furnace cooling; 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: 750-800°C + 650-700°C (In the case that the nickel is at the lower side of the range specified, a single tempering at 620 to 720°C may be sufficient); Quenching (+QT900): 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: 600-650°C.

UNI 1.4057 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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Impact Energy

val1 J

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Brinell Hardness (HB)

262 — 331

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Rockwell Hardness (HR)

val1

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Vickers Hardness (HV)

val1

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385 Cross References

51 Composition
192 Mechanical Properties
52 Physical Properties
10 Heat Treatment
- Metallography
- Machinability

34 Stress-Strain
8 Formability
- Fatigue
- Fracture
- Creep

2 Joints
- Coatings
13 Dimensions
- Tribology

13 Corrosion
- Ageing
- Weatherability
- Irradiation

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