UNI 1.4521 Stainless steels

Material group: Ferrous Alloys / Stainless steels
Country/Standard: Italy / UNI

Data updates

Latest Update: 2025-11
Total number of updates: 8
Update History

This material has 340 properties — only a subset is shown here.

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UNI 1.4521 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.025
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
17.0 – 20.0
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 1.00
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
CRITERIA
P
VALUE
val1
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UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
Ti
VALUE
val1
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UNIT
%
CAS NUMBER
7440-32-6

EN 10088-2: 2024 / Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes

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UNI 1.4521 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 220 GPa
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Density
val1
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kg/dm³
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Poisson Coefficient
val1
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Thermal Conductivity
23 W/(m∙°C)
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Heat Capacity
val1
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J/(kg∙°C)
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Electrical Resistivity
0.8 Ω∙mm²/m
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Electrical Conductivity
val1
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S/m
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This material has 340 properties — only a subset is shown here.

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UNI 1.4521 Heat Treatments

  • Hot forming: 1100-800°C, air cooling;
    +A - Annealing: 820-880°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), air or water cooling.
  • Hot forming: 1100 - 800°C, air cooling. Annealing: 820 - 880°C, air, water cooling.

UNI 1.4521 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
280 MPa
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Tensile Strength
400 — 640 MPa
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Elongation, A
10 %
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Impact Energy
val1
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J
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  • 97 Cross References
  • 54 Composition
  • 64 Mechanical Properties
  • 18 Physical Properties
  • 3 Heat Treatment
  • - Metallography
  • 1 Machinability
  • 16 Stress-Strain
  • - Formability
  • 1 Fatigue
  • - Fracture
  • - Creep
  • - Joints
  • - Coatings
  • 4 Dimensions
  • - Tribology
  • 2 Corrosion
  • - Ageing
  • - Weatherability
  • - Irradiation
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