ASTM A 387 Grade 91 Type 1 Class 2 Structural and constructional steels
Material group:
Ferrous Alloys / Structural and constructional steels
Country / Standard:
United States / ASTM
Data updates
Latest Update: 2018-05
Total number of updates: 3
Update History
2018-03
2017-04
This material has 302 properties — only a subset is shown here.
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ASTM A 387 Grade 91 Type 1 Class 2 Chemical Composition
CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≤ 0.02
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
0.06 – 0.15
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
7.90 – 9.60
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
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
CRITERIA
Nb
VALUE
val1
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UNIT
%
CAS NUMBER
7440-03-1
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
Zr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-67-7
A387/A387M: 2025 / Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum
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ASTM A 387 Grade 91 Type 1 Class 2 Physical Properties
Temperature
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 302 properties — only a subset is shown here.
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ASTM A 387 Grade 91 Type 1 Class 2 Heat Treatments
- Grade 91 plates shall be thermally treated, either by normalizing and tempering or by accelerated cooling from the austenitizing temperature by air blasting or liquid quenching, followed by tempering. Plates shall be austenitized at 1040°C to 1080°C (1900°F to 1975°F) and shall be tempered at 730°C to 800°C (1350°F to 1470°F).
Plates ordered without required heat treatment shall be furnished in either the stress relieved or the annealed condition.
ASTM A 387 Grade 91 Type 1 Class 2 Mechanical Properties
Temperature
Tensile Strength
585 — 760
MPa
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Elongation, A
≥ 18
%
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Yield Strength, Rp0.2
≥ 415
MPa
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ASTM A 387 Grade 91 Type 1 Class 2 International Equivalent Materials
Showing 15 of 82 results.
MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.
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- 82Cross References
- 14Composition
- 3Mechanical Properties
- 3Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- 1Stress-Strain
- -Formability
- 23Fatigue
- -Fracture
- 35Creep
- 31Joints
- -Coatings
- 47Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- 62Total Suppliers