A 447 Type II (United States / ASTM) Material Properties

Material group: Ferrous Alloys / Cast steels
Country/Standard: United States / ASTM

Data updates

Latest Update: 2021-09
Total number of updates: 1
Update History:

Mechanical Properties

Temperature

0 - 30°C
≥ 300°C
PROPERTY / VALUE
Tensile Strength 550 MPa view details
Tensile Strength val1
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MPa view details
Elongation, A 4 % view details
Elongation, A val1
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% view details
Tensile Strength 79.8 ksi view details
Tensile Strength val1
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ksi view details
Elongation, A 4 % view details
Elongation, A val1
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% view details

Physical Properties

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Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.20 – 0.45
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
23.00 – 28.00
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 2.50
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
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

A447/A447M: 2011 / Standard Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service

Heat Treatments

  • Heated for 24 h at 760 ± 14°C (1400 ± 25°F), cooling at least down to 205°C (400°F) at rates not exceeding 110°C (200°F)/hour.<br />Magnetic properties of material were obtained after heating specimen in air to 1095 ± 14°C (2000 ± 25°F), holding within this range for 24 h, and then quenching in water. After quenching, all scale and superficial oxidized metal shall be removed in order to avoid errors that might arise from the presence of magnetizable oxides formed during heating.