ASTM A 638 Grade 660 Type 2 Stainless steels

Material group: Ferrous Alloys / Stainless steels
Country/Standard: United States / ASTM

Data updates

Latest Update: 2020-07
Total number of updates: 2
Update History
2018-09

This material has 474 properties — only a subset is shown here.

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ASTM A 638 Grade 660 Type 2 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≤ 0.35
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
B
VALUE
0.0010 – 0.010
UNIT
%
CAS NUMBER
7440-42-8
CRITERIA
C
VALUE
≤ 0.08
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-47-3
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

A638/A638M: 2023 / Precipitation Hardening Iron Base Superalloy Bars, Forgings, and Forging Stock for High-Temperature Service

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ASTM A 638 Grade 660 Type 2 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 215 GPa
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Density
7.61 — 8.1 kg/dm³
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Poisson Coefficient
0.27 — 0.3
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This material has 474 properties — only a subset is shown here.

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ASTM A 638 Grade 660 Type 2 Heat Treatments

  • Solution treatment: 980 ± 15°C (1800 ± 25°F), hold for 1 hour minimum, followed by quenching in oil or water.
    Precipitation hardening: 705 to 760°C (1300 to 1400°F), hold for 16 hours minimum, followed by air or furnace cooling.

ASTM A 638 Grade 660 Type 2 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
val1
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MPa
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Tensile Strength
895 MPa
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Elongation, A
15 %
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Reduction of Area
val1
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%
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Brinell Hardness (HB)
248
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Grain Size
val1
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  • 286 Cross References
  • 12 Composition
  • 6 Mechanical Properties
  • 3 Physical Properties
  • 1 Heat Treatment
  • - Metallography
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  • - Formability
  • - Fatigue
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  • 1 Creep
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  • 16 Dimensions
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