SA-705 Type 631 (United States / ASME) Material Properties

Alternative designations: 17Cr-7Ni-1Al
Material group: Ferrous Alloys / Stainless steels
Country/Standard: United States / ASME

Data updates

Latest Update: 2024-02
Total number of updates: 3
Update History:
2024-01 2020-10

Mechanical Properties

Temperature

0 - 30°C
30 - 100°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 1170 MPa view details
Tensile Strength val1
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MPa view details
Elongation, A 6 % view details
Reduction of Area val1
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% view details
Brinell Hardness (HB) 229 view details
Rockwell Hardness (HR) val1
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Yield Strength, Rp0.2 val1
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ksi view details
Yield Strength, Rp0.2 val1
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ksi view details
Tensile Strength 169.7 ksi view details
Tensile Strength val1
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ksi view details
Elongation, A 6 % view details
Reduction of Area val1
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% view details
Brinell Hardness (HB) 229 view details
Rockwell Hardness (HR) val1
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Physical Properties

Temperature

≤ 0°C
0 - 30°C
30 - 100°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Modulus of Elasticity 210 — 218 GPa view details
Modulus of Elasticity val1
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GPa view details
Modulus of Elasticity val1
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GPa view details
Modulus of Elasticity val1
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GPa view details
Modulus of Elasticity val1
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GPa view details
Density 7.61 — 8.1 kg/dm³ view details
Poisson Coefficient val1
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Thermal Conductivity 14.8 W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Modulus of Elasticity 30.5 E+03 — 31.6 E+03 ksi view details
Modulus of Elasticity val1
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ksi view details
Modulus of Elasticity val1
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ksi view details
Modulus of Elasticity val1
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ksi view details
Modulus of Elasticity val1
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ksi view details
Density 0.275 — 0.293 lb/in³ view details
Poisson Coefficient val1
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Thermal Conductivity 8.55 BTU/(h∙ft∙°F) view details
Thermal Conductivity val1
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BTU/(h∙ft∙°F) view details
Thermal Conductivity val1
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BTU/(h∙ft∙°F) view details
Thermal Conductivity val1
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BTU/(h∙ft∙°F) view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
0.75 – 1.50
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
≤ 0.09
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
16.00 – 18.00
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
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

ASME Boiler and Pressure Vessel Code An International Code Section II - Part A Ferrous Material Specifications / American Society of Mechanical Engineers / 2023

Heat Treatments

  • Solution treating: 1040 ± 15°C, quenching in water.<br>Precipitation hardening:<br>RH950: 955°C for not less than 10 min, but not more than 1h, cool rapidly to room temperature. Cool within 24h to -75°C hold not less than 8h. Warm in air to room temperature. Heat to 510°C hold 1h, air cool.<br>TH1050: Alternative treatment: 760°C hold 90 min, cool to 15 ± 3°C within 1h. Hold not less than 30 min, heat to 565°C hold for 90 min, air cool.