ASME SA-995 Grade 6A Cast steels

Alternative designations: 25Cr-7.5Ni-3.5Mo-N-Cu-W
Material group: Ferrous Alloys / Cast steels
Country/Standard: United States / ASME

Data updates

Latest Update: 2024-01
Total number of updates: 3
Update History
2023-12 2023-10

ASME SA-995 Grade 6A Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.030
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
24.0 – 26.0
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
0.5 – 1.0
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
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
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
W
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-33-7

ASME Boiler and Pressure Vessel Code An International Code Section II - Part A Ferrous Material Specifications / American Society of Mechanical Engineers / 2025

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ASME SA-995 Grade 6A Physical Properties

Temperature

≤ 0°C
0 - 30°C
30 - 100°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Modulus of Elasticity val1
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GPa Unlock full details
Density 7.83 kg/dm³ Unlock full details
Poisson Coefficient val1
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Service Temperature ≤ 315 °C Unlock full details

This material has 372 properties — only a subset is shown here.

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ASME SA-995 Grade 6A Heat Treatments

  • Heat treatment: 1100°C (2010°F) minimum, hold for sufficient time to heat casting uniformly to temperature, quench in water or rapid cool by other means, or the casting may be furnace cooled to a temperature no lower than 1050°C (1925°F), hold for 15 min minimum, and then quench in water or rapid cool by other means.

ASME SA-995 Grade 6A Mechanical Properties

Temperature

≤ 0°C
0 - 30°C
30 - 100°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Yield Strength, Rp0.2 450 MPa Unlock full details
Tensile Strength 690 MPa Unlock full details
Elongation, A 25 % Unlock full details

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  • 261 Cross References
  • 11 Composition
  • 25 Mechanical Properties
  • 13 Physical Properties
  • 1 Heat Treatment
  • - Metallography
  • - Machinability
  • 1 Stress-Strain
  • - Formability
  • - Fatigue
  • - Fracture
  • 9 Creep
  • - Joints
  • - Coatings
  • - Dimensions
  • - Tribology
  • - Corrosion
  • - Ageing
  • - Weatherability
  • - Irradiation
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