UNI 1.4938 Stainless steels

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

Data updates

Latest Update: 2025-03
Total number of updates: 7
Update History

This material has 468 properties — only a subset is shown here.

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UNI 1.4938 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.08 – 0.15
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
11.0 – 12.5
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.40 – 0.90
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
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
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
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2

EN 10269: 2013 / Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

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UNI 1.4938 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 216 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
30 W/(m∙°C)
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Heat Capacity
val1
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J/(kg∙°C)
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Electrical Resistivity
0.6 Ω∙mm²/m
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Electrical Conductivity
val1
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S/m
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This material has 468 properties — only a subset is shown here.

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UNI 1.4938 Heat Treatments

  • (+QT) Quenched: 1035-1065°C, cooled in oil; Tempered: 600-670°C.
  • Hardened and tempered: 1020 ≤ t ≤ 1050°C; PQ, OQ or AC; t ≥ 640°C.
    For optimum corrosion resistance 990 ≤ t ≤ 1030°C is recommended.

UNI 1.4938 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
val1
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MPa
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Tensile Strength
900 — 1130 MPa
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Elongation, A
10 %
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Reduction of Area
val1
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%
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Impact Energy
val1
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J
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Brinell Hardness (HB)
269 — 331
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Grain Size
val1
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  • 114 Cross References
  • 41 Composition
  • 41 Mechanical Properties
  • 41 Physical Properties
  • 3 Heat Treatment
  • 1 Metallography
  • - Machinability
  • 2 Stress-Strain
  • - Formability
  • - Fatigue
  • - Fracture
  • - Creep
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  • 156 Dimensions
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