UNI C 21 Structural and constructional steels
Material group:
Ferrous Alloys / Structural and constructional steels
Country / Standard:
Italy / UNI
Indicative price:
Data updates
Latest Update: 2019-07
Total number of updates: 1
Update History
This material has 64 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 C 21 Chemical Composition
CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.18 – 0.24
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
0.30 – 0.60
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
P
VALUE
≤ 0.035
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
UNI 6922: 1971 / Aircraft metallic materials. Unalloyed steel (C 0,21 %)
Looking for full material performance data?
View Complete Material Data ›
Free registration required • Instant access
Free registration required • Instant access
UNI C 21 Physical Properties
Temperature
Modulus of Elasticity
190 — 210
GPa
Unlock full details
Full data available with free access
View Complete Material Data
Electrical Resistivity
0.14
Ω∙mm²/m
Unlock full details
Full data available with free access
View Complete Material Data
Density
Unlock full details
Full data available with free access
View Complete Material Data
Thermal Conductivity
47.279
W/(m∙°C)
Unlock full details
Full data available with free access
View Complete Material Data
Electrical Conductivity
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)
Unlock full details
Full data available with free access
View Complete Material Data
This material has 64 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 C 21 Heat Treatments
- Annealing: Heat to 650-690°C, hold 2 hours then slow cool in the furnace (approximately 50°C per hour) to 500°C or below, followed by cooling to room temperature in still air. Normalizing: Heat to 880-900°C, hold at temperature for a time sufficient to complete transformation then cool in still air.
UNI C 21 Mechanical Properties
Temperature
Tensile Strength
392 — 490
MPa
Unlock full details
Full data available with free access
View Complete Material Data
Brinell Hardness (HB)
≤ 140
Unlock full details
Full data available with free access
View Complete Material Data
Elongation, A
≥ 20
%
Unlock full details
Full data available with free access
View Complete Material Data
Yield Strength, Rp0.2
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 ›
Book A Demo
Free registration required • Instant access
Free registration required • Instant access
Optimize material selection for your application - Book A Demo
- 13Cross References
- 5Composition
- 28Mechanical Properties
- 10Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- 7Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- -Total Suppliers