1.8868 (Germany / DIN) Material Properties

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

Data updates

Latest Update: 2024-09
Total number of updates: 9
Update History:
2022-08 2022-04 2021-10 2021-09 2019-09 2017-09 2017-06 2016-03

Mechanical Properties

Temperature

≤ 0°C
0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 275 MPa view details
Tensile Strength 450 — 630 MPa view details
Elongation, A 21 % view details
Impact Energy val1
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J view details
Impact Energy val1
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J view details
Yield Strength, Rp0.2 39.9 ksi view details
Tensile Strength 65.3 — 91.4 ksi view details
Elongation, A 21 % view details
Impact Energy val1
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ft·lb view details
Impact Energy val1
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ft·lb view details

Physical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 210 GPa view details
Density 7.67 — 7.86 kg/dm³ view details
Poisson Coefficient val1
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view details
Service Temperature -60 °C view details
Modulus of Elasticity 27.6 E+03 — 30.5 E+03 ksi view details
Density 0.277 — 0.284 lb/in³ view details
Poisson Coefficient val1
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view details
Service Temperature -76 °F view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≥ 0.020
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
≤ 0.18
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
CEV
VALUE
≤ 0.47
UNIT
%
CAS NUMBER
CRITERIA
Cr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
val1
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UNIT
%
CAS NUMBER
7440-50-8
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
Nb+V
VALUE
val1
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UNIT
%
CAS NUMBER
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 10222-4: 2017 / Steel forgings for pressure purposes - Part 4: Weldable fine grain steels with high proof strength

Heat Treatments

  • Quenched and tempered: 860-940°C, cooled in oil, polymer or water. Tempered at 600-700°C.
  • Hardened at 860-940°C. After reaching the temperature in the entire cross-section cooled in air or quenched in water or oil. <br />Tempered at 560-700°C, held for minimum 30 minutes, cooled in still air.<br /> <b>Normalizing</b>: Heated at 880-960°C. After reaching the temperature in the entire cross-section cooled in still air.<br><br>Heat treatment after welding:<br>Stress relief annealing at 530-580°C. Cooling down in still air or in the oven.<br>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:<br>≤ 15 mm at least 15 min<br>> 15 mm ≤ 30 mm at least 30 min<br>> 30 mm ≤ 350 mm at least 60 min<br>> 350 mm approx. 120 min<br>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.