PN 38HNM Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country / Standard: Poland / PN

Data updates

Latest Update: 2014-07
Total number of updates: 2
Update History
2014-04

This material has 49 properties — only a subset is shown here.

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PN 38HNM Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.34 – 0.43
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.60 – 0.90
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
≤ 0.30
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
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
W
VALUE
val1
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UNIT
%
CAS NUMBER
7440-33-7

PN-H-84030-04: 1989 / Structural alloyed steel - Steel for heat treatment (quenching + tempering) and surface hardening - Grades

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PN 38HNM 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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This material has 49 properties — only a subset is shown here.

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PN 38HNM Heat Treatments

  • Hardening in oil at 830-850ºC then Tempering in water or oil at 580-620°C.
  • Hardening in oil at 840ºC then Tempering in air or oil at 620ºC; Hardening temperature: 845°C; Delivery forgings: Heat treated at 1050-850°C: Softening: 650-700°C; Normalizing: 830-860°C; Hardening in water at 830-860°C or in the oil at 830-850°C: Tempering: recommended for dismounted cooling after tempering (oil or water) at 540-660°C.

PN 38HNM Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
740 — 1230 MPa
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Brinell Hardness (HB)
≤ 241
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Elongation, A
≥ 10 %
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Impact Strength
val1
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kJ/m²
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Yield Strength, Rp0.2
val1
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MPa
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  • -Cross References
  • 12Composition
  • 30Mechanical Properties
  • 3Physical Properties
  • 3Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
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