GB A31108 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country / Standard: China / GB

Data updates

Latest Update: 2026-05
Total number of updates: 3
Update History
2025-10 2024-07

This material has 225 properties — only a subset is shown here.

Unlock full material properties, including detailed values across temperatures and conditions.

View Complete Material Data ›
Free registration required • Instant access

Free registration required • Instant access

GB A31108 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≤ 0.020
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
As
VALUE
≤ 0.010
UNIT
%
CAS NUMBER
7440-38-2
CRITERIA
As+Bi+Pb+Sb+Sn
VALUE
≤ 0.035
UNIT
%
CAS NUMBER
CRITERIA
B
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-42-8
CRITERIA
Bi
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-69-9
CRITERIA
C
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-50-8
CRITERIA
Mn
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
N
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
CRITERIA
Nb
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-03-1
CRITERIA
Ni
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
P
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
Pb
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7439-92-1
CRITERIA
S
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Sb
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-36-0
CRITERIA
Si
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
Sn
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-31-5
CRITERIA
Ti
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-32-6
CRITERIA
V
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-62-2
CRITERIA
W
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-33-7
CRITERIA
Zr
VALUE
val1
Full data available with free access View Complete Material Data
UNIT
%
CAS NUMBER
7440-67-7

GB/T 5310: 2023 / Seamless steel tubes and pipes for high pressure boiler

Looking for full material performance data?

View Complete Material Data ›
Free registration required • Instant access

Free registration required • Instant access

GB A31108 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
Unlock full details
Full data available with free access View Complete Material Data
Density
7.67 — 7.86 kg/dm³
Unlock full details
Full data available with free access View Complete Material Data
Poisson Coefficient
0.27 — 0.3
Unlock full details
Full data available with free access View Complete Material Data

This material has 225 properties — only a subset is shown here.

Unlock detailed physical values across temperatures and conditions.

View Complete Material Data ›
Free registration required • Instant access

Free registration required • Instant access

GB A31108 Heat Treatments

  • Normalizing temperature from 1040°C to 1080°C; Tempering temperature 750°C to 780°C.
    For S>70 mm steel pipes can be quenched and tempered. Quenching temperature not less than 1040°C, tempering temperature 750°C to 780°C.
  • Normalizing at 1040 - 1080°C, tempering at 750 - 780°C. For wt > 70 mm quenching not lower than 1040°C, tempering at 750 - 780°C.

GB A31108 Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
≥ 585 MPa
Unlock full details
Full data available with free access View Complete Material Data
Brinell Hardness (HB)
190 — 255
Unlock full details
Full data available with free access View Complete Material Data
Elongation, A
≥ 16 %
Unlock full details
Full data available with free access View Complete Material Data
Yield Strength, Rp0.2
val1
Full data available with free access View Complete Material Data
MPa
Unlock full details
Full data available with free access View Complete Material Data
Impact Energy
val1
Full data available with free access View Complete Material Data
J
Unlock full details
Full data available with free access View Complete Material Data
Rockwell Hardness (HR)
val1
Full data available with free access View Complete Material Data
Unlock full details
Full data available with free access View Complete Material Data
Vickers Hardness (HV)
val1
Full data available with free access View Complete Material Data
Unlock full details
Full data available with free access View Complete Material Data

Need complete mechanical properties to make the right choice?

Get complete data on strength, hardness, fatigue, and more.

View Complete Material Data ›
Free registration required • Instant access

Free registration required • Instant access

Book A Demo

GB A31108 International Equivalent Materials

Showing 15 of 74 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STBA 26
STANDARD
JIS
COUNTRY / PRODUCER
Japan
EQUIVALENCE CATEGORY
Official
MATERIAL
SA-213 Grade T91 Type 1
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
SA-335 Grade P91 Type 1
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 213 Grade T91 Type 1
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
TU Z 10 CD 9
STANDARD
AFNOR NF
COUNTRY / PRODUCER
France
EQUIVALENCE CATEGORY
Implicit
MATERIAL
X11CrMo9-1+I
STANDARD
AFNOR NF
COUNTRY / PRODUCER
France
EQUIVALENCE CATEGORY
Implicit
MATERIAL
A 213 Grade T9
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
A 182 F 91
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
A 335 Grade P91 Type 1
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
X11CrMo9-1+I
STANDARD
EN
COUNTRY / PRODUCER
European Union
EQUIVALENCE CATEGORY
Implicit
MATERIAL
AF91
STANDARD
GB
COUNTRY / PRODUCER
China
EQUIVALENCE CATEGORY
Official
MATERIAL
10Cr9Mo1VNbN
STANDARD
NB
COUNTRY / PRODUCER
China
EQUIVALENCE CATEGORY
Official
MATERIAL
STHA 26
STANDARD
KS
COUNTRY / PRODUCER
Korea
EQUIVALENCE CATEGORY
Implicit
MATERIAL
K90901
STANDARD
UNS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
K91560
STANDARD
UNS
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.

Need the full list of 74 international equivalents?

See all 74 equivalent grades with detailed mapping by standard, producer and equivalence category.

View All Equivalents ›
Free registration required • Instant access

Free registration required • Instant access

Book A Demo

Optimize material selection for your application - Book A Demo

  • 74Cross References
  • 46Composition
  • 41Mechanical Properties
  • 5Physical Properties
  • 2Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • 3Creep
  • -Joints
  • -Coatings
  • 2Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 52Total Suppliers