DIN 1.6958 Structural and constructional steels

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

Data updates

Latest Update: 2025-03
Total number of updates: 7
Update History

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DIN 1.6958 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
0.005 – 0.050
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
0.25 – 0.30
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
1.20 – 1.70
UNIT
%
CAS NUMBER
7440-47-3
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
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
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2

WB 390: 1997 / High-strength steel for bolts and nuts, 26 NiCrMo 14 6, material No. 1.6958

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DIN 1.6958 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Dynamic Modulus of Elasticity
val1
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GPa
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Density
7.67 — 7.86 kg/dm³
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Poisson Coefficient
val1
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Thermal Conductivity
29 W/(m∙°C)
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Heat Capacity
val1
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J/(kg∙°C)
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This material has 216 properties — only a subset is shown here.

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DIN 1.6958 Heat Treatments

  • (+QT) Quenched: 840-870°C, cooled in water or oil; Tempered: 530-620°C (min. 2h)
  • Hardened at 840-870°C,quenched in oil or water
    Tempered at 530-680°C
    This temperature must be at least 30°C below the stress relief annealing temperature

DIN 1.6958 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
735 MPa
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Tensile Strength
860 — 1240 MPa
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Elongation, A
11 %
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Reduction of Area
val1
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%
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Impact Energy
val1
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J
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  • 41 Cross References
  • 29 Composition
  • 62 Mechanical Properties
  • 54 Physical Properties
  • 3 Heat Treatment
  • - Metallography
  • - Machinability
  • - Stress-Strain
  • - Formability
  • - Fatigue
  • - Fracture
  • - Creep
  • - Joints
  • - Coatings
  • 23 Dimensions
  • - Tribology
  • - Corrosion
  • - Ageing
  • - Weatherability
  • - Irradiation
  • 4 Total Suppliers