DIN 1.1121 Structural and constructional steels

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

Data updates

Latest Update: 2024-12
Total number of updates: 12
Update History

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DIN 1.1121 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.0700 – 0.1300
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
0.3000 – 0.6000
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
P
VALUE
≤ 0.0350
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

DIN 1652-3: 1990 / Bright steel made from case hardening steel; technical delivery conditions

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DIN 1.1121 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
0.27 — 0.3
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DIN 1.1121 Heat Treatments

  • Carburizing at 880 - 980°C. Core-hardening at 880 - 92°C, case-hardening at 780 - 820°C, quenching. Tempering at 150 - 200°C.
  • Carburizing: 880 to 980°C; NOTE: If steels are direct hardened, in general, a carburizing temperature of 950°C is not exceeded. For special procedures, for example under vacuum, higher temperatures (for example 1020 to 1050°C) are not unusual. Core hardening: 880 to 920°C; Case hardening: 780 to 820°C; Tempering: 150 to 200°C (as a guide, for 1 hour minimum).

DIN 1.1121 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
val1
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MPa
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Tensile Strength
310 — 830 MPa
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Elongation, A
7 %
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Brinell Hardness (HB)
85 — 225
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Rockwell Hardness (HR)
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Vickers Hardness (HV)
val1
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Grain Size
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