P55 (Poland / PN) Material Properties

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

Data updates

Latest Update: 2022-04
Total number of updates: 2
Update History:
2014-07

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 750 — 860 MPa view details
Elongation, A 12 % view details
Reduction of Area val1
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% view details
Impact Strength val1
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kJ/m² view details
Brinell Hardness (HB) 210 — 250 view details
Yield Strength, Rp0.2 val1
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ksi view details
Tensile Strength 108.8 — 124.7 ksi view details
Elongation, A 12 % view details
Reduction of Area val1
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% view details
Impact Strength val1
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ft·lb/in² view details
Brinell Hardness (HB) 210 — 250 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 0.27 — 0.3 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 0.27 — 0.3 view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≥ 0.02
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
0.52 – 0.60
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
≤ 0.30
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cr+Cu+Mo+Ni
VALUE
val1
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UNIT
%
CAS NUMBER
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
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

PN-H-84027-04: 1988 / Steel for railway - Forgings of draw-gear - Grades

Heat Treatments

  • Forging at 1100-850°C and slow cooling in containers or in piles in the hall; Softening at 650-700°C and slow cooling in the furnace; Normalizing at 830-860°C and cooling in still air; Quenching in water at 800-830°C or in oil at 810-840°C; Tempering at 530-670°C and cooling in still air in the hall