Chemical composition in % of the material D21 ( Д21 ) .
Fe
Si
Mn
Ti
Al
Cu
Mg
Zn
Impurity
max 0.3
max 0.3
0.4 - 0.8
0.1 - 0.2
90.75 - 93.25
6 - 7
0.25 - 0.45
max 0.1
other, each 0.1; all 0.05
Comment: Al is a basis; the percentage of Al is given approximately.
Mechanical properties under Т=20oС of the material D21 ( Д21 ) .
Assortment
Dimension
Direct.
sв
sT
d5
y
KCU
Heat treatment
-
mm
-
MPa
MPa
%
%
kJ / m2
-
Forging
400
260
6
Brinell hardness of the material D21 ( Д21 ) ,
HB 10 -1= 100 MPa
Specification :
Mechanical properties :
sв
- Tensile strength , [MPa]
sT
- Yield stress, [MPa]
d5
- Specific elongation at fracture , [ % ]
y
- Reduction of area , [ % ]
KCU
- Impact strength , [ kJ / m2]
HB
- Brinell hardness , [MPa]
Database of steels and alloys (Marochnik) contains information about chemical composition and properties of 1500 steels and alloys (stainless steel, alloy steel, carbone steel, structural steel, tool steel, cast iron, aluminum alloy, titanium alloy, copper alloy, nickel alloy, magnesium alloy and others). Helpfull for specialists in material technology, structural engineer, mechanical engineer, metallurgy and metal trader