ASME SA-336 Grade F91 Type 1 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country/Standard: United States / ASME

Data updates

Latest Update: 2024-02
Total number of updates: 6
Update History
2024-01 2023-11 2023-10 2019-11 2017-10

This material has 301 properties — only a subset is shown here.

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ASME SA-336 Grade F91 Type 1 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≤ 0.02
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
0.08 – 0.12
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
8.0 – 9.5
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

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-336 Grade F91 Type 1 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Density
7.67 — 7.86 kg/dm³
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Poisson Coefficient
val1
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Coefficient of Thermal Expansion (CTE)
val1
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10-6/°C
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Thermal Conductivity
22.3 W/(m∙°C)
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This material has 301 properties — only a subset is shown here.

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ASME SA-336 Grade F91 Type 1 Heat Treatments

  • The austenitizing temperature shall be in the range of 1040 to 1080°C (1900 to 1975°F). Normalizing or liquid quenching shall be followed by tempering in the range of 730 - 800°C (1350 - 1470°F).
    Any section thickness greater than 75 mm shall be normalized and tempered or liquid quenched and tempered at the manufacturer’s option.

ASME SA-336 Grade F91 Type 1 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
415 MPa
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Tensile Strength
620 — 760 MPa
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Elongation, A
20 %
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Reduction of Area
val1
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%
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  • 91 Cross References
  • 14 Composition
  • 39 Mechanical Properties
  • 68 Physical Properties
  • 1 Heat Treatment
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  • 58 Creep
  • 1 Joints
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  • 15 Dimensions
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