DIN 1.8869 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country/Standard: Germany / DIN

Data updates

Latest Update: 2024-09
Total number of updates: 8
Update History

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DIN 1.8869 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
B
VALUE
≤ 0.0050
UNIT
%
CAS NUMBER
7440-42-8
CRITERIA
C
VALUE
≤ 0.1600
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
≤ 0.3000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
val1
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UNIT
%
CAS NUMBER
7440-50-8
CRITERIA
Cu+6Sn
VALUE
val1
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UNIT
%
CAS NUMBER
CRITERIA
Mn
VALUE
val1
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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
Nb
VALUE
val1
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UNIT
%
CAS NUMBER
7440-03-1
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
Ti
VALUE
val1
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UNIT
%
CAS NUMBER
7440-32-6
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2
CRITERIA
Zr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-67-7

EN 10028-6: 2017 / Flat products made of steels for pressure purposes - Part 6: Weldable fine grain steels, quenched and tempered

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DIN 1.8869 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Density
7.67 — 7.86 kg/dm³
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Poisson Coefficient
val1
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Service Temperature
-60 °C
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This material has 732 properties — only a subset is shown here.

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DIN 1.8869 Heat Treatments

  • Hardened at 860-940°C. After reaching the temperature in the entire cross-section cooled in air or quenched in water or oil.
    Tempered at 560-700°C, held for minimum 30 minutes, cooled in still air.
    Normalizing: Heated at 880-960°C. After reaching the temperature in the entire cross-section cooled in still air.

    Heat treatment after welding:
    Stress relief annealing at 530-580°C. Cooling down in still air or in the oven.
    The duration required for the specified annealing temperatures includes heating through and keeping within the temperature range and depends on the thickness of the components. When measuring the annealing temperature on the component surface, the following guide values are recommended depending on the thickness:
    ≤ 15 mm at least 15 min
    > 15 mm ≤ 30 mm at least 30 min
    > 30 mm ≤ 350 mm at least 60 min
    > 350 mm approx. 120 min
    The maximum holding time for the usual stress-relieving annealing is 150 min. With a holding time > 90 min or in the case of multiple annealing, the lower limit of the temperature range should be aimed for.
  • Quenched and tempered: 860-940°C, cooled in oil, polymer or water. Tempered at 600-700°C.

DIN 1.8869 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
275 MPa
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Tensile Strength
450 — 630 MPa
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Elongation, A
21 %
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Impact Energy
val1
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J
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  • 51 Composition
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  • 4 Physical Properties
  • 2 Heat Treatment
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