UNI X 8 Ni 9 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country/Standard: Italy / UNI

Data updates

Latest Update: 2021-10
Total number of updates: 6
Update History
2018-04 2017-09 2017-06 2016-04 2014-06

This material has 757 properties — only a subset is shown here.

Unlock full material properties, including detailed values across temperatures and conditions.

View Complete Material Data ›
Free registration required • Instant access

Free registration required • Instant access

UNI X 8 Ni 9 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.10
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr+Cu+Mo
VALUE
≤ 0.50
UNIT
%
CAS NUMBER
CRITERIA
Mn
VALUE
0.30 – 0.80
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
Ni
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
P
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Si
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
V
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-62-2

EN 10028-4: 2017 / Flat products made of steels for pressure purposes - Part 4: nickel alloy steels with specified low temperature properties

Looking for full material performance data?

View Complete Material Data ›
Free registration required • Instant access

Free registration required • Instant access

UNI X 8 Ni 9 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
Unlock full details
Full data available with free access View Complete Material Data
Dynamic Modulus of Elasticity
val1
Full data available with free access View Complete Material Data
GPa
Unlock full details
Full data available with free access View Complete Material Data
Density
val1
Full data available with free access View Complete Material Data
kg/dm³
Unlock full details
Full data available with free access View Complete Material Data
Poisson Coefficient
val1
Full data available with free access View Complete Material Data
Unlock full details
Full data available with free access View Complete Material Data
Coefficient of Thermal Expansion (CTE)
val1
Full data available with free access View Complete Material Data
10-6/°C
Unlock full details
Full data available with free access View Complete Material Data
Thermal Conductivity
val1
Full data available with free access View Complete Material Data
W/(m∙°C)
Unlock full details
Full data available with free access View Complete Material Data
Heat Capacity
val1
Full data available with free access View Complete Material Data
J/(kg∙°C)
Unlock full details
Full data available with free access View Complete Material Data
Electrical Resistivity
val1
Full data available with free access View Complete Material Data
Ω∙mm²/m
Unlock full details
Full data available with free access View Complete Material Data
Electrical Conductivity
val1
Full data available with free access View Complete Material Data
S/m
Unlock full details
Full data available with free access View Complete Material Data

This material has 757 properties — only a subset is shown here.

Unlock detailed physical values across temperatures and conditions.

View Complete Material Data ›
Free registration required • Instant access

Free registration required • Instant access

UNI X 8 Ni 9 Heat Treatments

  • +NT640 (+N plus +NT):
    Austenitizing at 880 to 930°C + 770 to 830°C and air cooling; Tempering at 540 to 600°C and air or water cooling.
    +QT640 (+QT):
    Austenitizing at 770 to 830°C and air or oil cooling; Tempering at 540 to 600°C and air or water cooling.
    +QT 680 (+QT):
    Austenitizing at 770 to 830°C and water and oil cooling; Tempering at 540 to 600°C and air or water cooling.
  • (+N+N+T) Normalized: 880-930°C + 770-830°C, cooled in air; Tempered: 540-600°C.
    (+QT) Quenched: 770-830°C, cooled in oil or water; Tempered: 540-600°C.

UNI X 8 Ni 9 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
470 MPa
Unlock full details
Full data available with free access View Complete Material Data
Tensile Strength
640 — 840 MPa
Unlock full details
Full data available with free access View Complete Material Data
Elongation, A
18 %
Unlock full details
Full data available with free access View Complete Material Data
Reduction of Area
val1
Full data available with free access View Complete Material Data
%
Unlock full details
Full data available with free access View Complete Material Data
Impact Energy
val1
Full data available with free access View Complete Material Data
J
Unlock full details
Full data available with free access View Complete Material Data

Need complete mechanical properties to make the right choice?

Get complete data on strength, hardness, fatigue, and more.

View Complete Material Data ›
Free registration required • Instant access

Free registration required • Instant access

Book A Demo

Optimize material selection for your application - Book a Demo

  • 174 Cross References
  • 28 Composition
  • 158 Mechanical Properties
  • 46 Physical Properties
  • 3 Heat Treatment
  • - Metallography
  • - Machinability
  • - Stress-Strain
  • - Formability
  • - Fatigue
  • - Fracture
  • 8 Creep
  • 44 Joints
  • - Coatings
  • 156 Dimensions
  • - Tribology
  • - Corrosion
  • - Ageing
  • - Weatherability
  • - Irradiation
  • 140 Total Suppliers