27 CrMo 4 (Germany / VdTÜV) Material Properties

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

Data updates

Latest Update: 2015-01
Total number of updates: 1
Update History:

Mechanical Properties

Temperature

≤ 0°C
0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 665 MPa view details
Tensile Strength 780 — 1030 MPa view details
Elongation, A 16 % view details
Impact Energy val1
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J view details
Yield Strength, Rp0.2 96.5 ksi view details
Tensile Strength 113.1 — 149.4 ksi view details
Elongation, A 16 % 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 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
C
VALUE
0.25 – 0.30
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.90 – 1.10
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.70 – 0.90
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
P
VALUE
val1
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UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
P+S
VALUE
val1
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UNIT
%
CAS NUMBER
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

WB 228: 2001 / Rolled and forged steel 27 CrMo 4 I, II, III

Heat Treatments

  • Heat treatment A: Hardening at 830 to 880°C for 3 min/mm plate thicknesses, at least 30 minutes and cooling in oil for wall thickness <= 10 mm; Tempering at 560 to 620°C for 5 min/mm plate thicknesses, at least 30 minutes and cooling in air; Heat treatment B: Hardening at 830 to 880°C for 3 min/mm plate thicknesses, at least 30 minutes and cooling in water oil mixture for wall thickness > 10 mm; Tempering at 580 to 630°C for 5 min/mm plate thicknesses, at least 30 minutes and cooling in air.