UNI X1NiCrMoCu31-27-4 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country/Standard: Italy / UNI

Data updates

Latest Update: 2025-10

Total number of updates: 10

Update History

2021-07 2020-03 2019-09 2016-10 2016-08 2016-04 2015-03 2015-02 2014-04

This material has 1007 properties — only a subset is shown here.

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UNI X1NiCrMoCu31-27-4 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.020

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

26.0 – 28.0

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

0.70 – 1.50

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

val1

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 X1NiCrMoCu31-27-4 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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Thermal Conductivity

12 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

1 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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This material has 1007 properties — only a subset is shown here.

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UNI X1NiCrMoCu31-27-4 Heat Treatments

Solution annealed (+AT): 1100-1160°C (for guidance only), cooling sufficiently rapid in water or air.
Hot forming: 1150-850°C, air cooling; Solution annealing (+AT): 1050-1150°C, water 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. 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 1020°C for steels with Mo contents exceeding 3 %.

UNI X1NiCrMoCu31-27-4 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

500 — 2100 MPa

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Elongation, A

20 %

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Impact Energy

val1 J

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Brinell Hardness (HB)

≤ 230

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179 Cross References

130 Composition
324 Mechanical Properties
19 Physical Properties
11 Heat Treatment
- Metallography
- Machinability

18 Stress-Strain
- Formability
- Fatigue
- Fracture
- Creep

8 Joints
- Coatings
153 Dimensions
- Tribology

1 Corrosion
- Ageing
- Weatherability
- Irradiation

164 Total Suppliers