ASTM A 335 Grade P91 Type 1 Structural and constructional steels

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

Data updates

Latest Update: 2020-01
Total number of updates: 5
Update History
2019-01 2018-04 2018-03 2015-09

This material has 261 properties — only a subset is shown here.

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ASTM A 335 Grade P91 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
8.00 – 9.50
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

A335/A335M: 2026 / Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

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ASTM A 335 Grade P91 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
0.27 — 0.3
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This material has 261 properties — only a subset is shown here.

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ASTM A 335 Grade P91 Type 1 Heat Treatments

  • Normalized and tempered or quenched and tempered. Normalized in range 1040 - 1080°C (1900 - 1975°F) and tempered in range 730 - 800°C (1350 - 1470°F) except when specified by purchaser. Shall be normalized and tempered at a temperature, to be specified by the purchaser, less than 730°C (1350°F). It shall be purchaser’s responsibility to subsequently temper at 730 - 800°C (1350 - 1470°F) minimum.
    It is recommended that the temperature for tempering should be at least 50°C (100°F) above the intended service temperature; consequently, the purchaser should advise the manufacturer if the service temperature is to be over 600°C (1100°F).
    After weld repair, shall be heat treated at 730 - 800°C (1350 - 1470°F).

ASTM A 335 Grade P91 Type 1 Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
≥ 585 MPa
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Brinell Hardness (HB)
190 — 250
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Elongation, A
≥ 12 %
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Rockwell Hardness (HR)
val1
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Vickers Hardness (HV)
val1
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Yield Strength, Rp0.2
val1
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MPa
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ASTM A 335 Grade P91 Type 1 International Equivalent Materials

Showing 15 of 109 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
SA-335 Grade P91 Type 1
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
K90901
STANDARD
UNS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
K91560
STANDARD
UNS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
SA-234 Grade WP91 Type 1
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
10Cr9Mo1VNbN
STANDARD
GB
COUNTRY / PRODUCER
China
EQUIVALENCE CATEGORY
Official
MATERIAL
AF91
STANDARD
GB
COUNTRY / PRODUCER
China
EQUIVALENCE CATEGORY
Official
MATERIAL
A31108
STANDARD
GB
COUNTRY / PRODUCER
China
EQUIVALENCE CATEGORY
Official
MATERIAL
SA-387 Grade 91 Type 1
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
SA-182 F 91 Type 1
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
SA-199 Grade T91
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
A 182 F 91 Type 1
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
A 234 Grade WP91 Type 1
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
A 182 F 91
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
STBA 26
STANDARD
JIS
COUNTRY / PRODUCER
Japan
EQUIVALENCE CATEGORY
Implicit
MATERIAL
P91
STANDARD
NB
COUNTRY / PRODUCER
China
EQUIVALENCE CATEGORY
Composition 100%

Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.

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  • 109Cross References
  • 14Composition
  • 17Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • 9Metallography
  • -Machinability
  • -Stress-Strain
  • 1Formability
  • 1Fatigue
  • -Fracture
  • 15Creep
  • 34Joints
  • -Coatings
  • 18Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 39Total Suppliers