ASME SA-841 Grade B Class 2 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 2016-01

This material has 211 properties — only a subset is shown here.

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ASME SA-841 Grade B Class 2 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≥ 0.020
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
≤ 0.15
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
CEV
VALUE
≤ 0.47
UNIT
%
CAS NUMBER
CRITERIA
Cr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
val1
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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
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

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-841 Grade B Class 2 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
val1
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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
60.4 W/(m∙°C)
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This material has 211 properties — only a subset is shown here.

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ASME SA-841 Grade B Class 2 Heat Treatments

  • Due to the inherent characteristics of the TMCP method, the plates cannot be formed at elevated temperatures without sustaining significant losses in strength and toughness. The plates may be formed and post weld heat treated at temperatures not exceeding 650°C (1200°F), providing the mechanical property requirements are met.

ASME SA-841 Grade B Class 2 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
380 MPa
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Tensile Strength
515 — 690 MPa
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Elongation, A
22 %
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  • 3 Cross References
  • 14 Composition
  • 37 Mechanical Properties
  • 82 Physical Properties
  • 1 Heat Treatment
  • - Metallography
  • - Machinability
  • 3 Stress-Strain
  • - Formability
  • - Fatigue
  • - Fracture
  • 36 Creep
  • - Joints
  • - Coatings
  • 34 Dimensions
  • - Tribology
  • - Corrosion
  • - Ageing
  • - Weatherability
  • - Irradiation
  • 1 Total Suppliers