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Ductile Iron Grades of
UNS, ASTM, AMS, SAE and MIL
The ASTM has five standards covering
Ductile Iron castings.
ASTM A 536 is the most frequently used, covering the general
engineering grades of Ductile Iron. The other standards cover
austenitic and special Ductile Iron applications. The ASTM has
issued in 1990 a new specification defining the properties of
Austempered Ductile Iron.
The SAE standard J434 is commonly used for specifying automotive
Ductile Iron castings. In an attempt to create a single,
comprehensive system for designating metals and alloys the ASTM and
SAE have jointly developed the Unified Numbering System (UNS).
While not itself a specification, the UNS designation is gaining
some degree of acceptance in North America as a useful means of
simplifying and correlating the various existing specifications.
The UNS designations for Ductile Irons, cross referenced to the
corresponding ASTM, AMS, SAE and MIL specifications, are shown
below.
|
UNS numbers and
corresponding American specifications |
|
Standard |
Numbers/Grades |
|
UNS |
F3000 |
F32800 |
F32900 |
F33100 |
F33101 |
F33800 |
F34100 |
|
ASTM A395 |
|
60-40-18 |
|
|
|
|
|
|
ASTM A536 |
|
60-40-18 |
|
65-45-12 |
|
80-55-06 |
|
|
ASTM A476 |
|
|
|
|
|
|
80-60-03 |
|
ASTM A716 |
|
|
****** |
|
|
|
|
|
AMS |
|
|
|
|
5315 |
|
5316 |
|
SAE J434 |
DQ & T |
D4018 |
|
D4512 |
|
D5506 |
|
|
MIL-I-24137 |
|
|
|
|
(A) |
|
|
|
|
|
UNS |
F34800 |
F36200 |
F43000 |
F43001 |
F43002 |
F43003 |
F43004 |
|
ASTM A439 |
|
|
D-2 |
D-2B |
D-2C |
C-3 |
C-3A |
|
ASTM A536 |
100-70-03 |
120-90-02 |
|
|
|
|
|
|
SAE J434 |
D7003 |
|
|
|
|
|
|
|
|
|
UNS |
F43005 |
F43006 |
F43007 |
F43010 |
F43020 |
F43021 |
F43030 |
|
ASTM A439 |
D-4 |
D-5 |
D-5B |
|
|
|
|
|
ASTM A571 |
|
|
|
D-2M |
|
|
|
|
AMS |
|
|
|
|
|
|
5395 |
|
MIL-I-24137 |
|
|
|
|
(B) |
(C) |
|
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