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Standard Specification forChromium and Chromium-Nickel Stainless Steel Plate,Sheet, and Strip for Pressure Vessels and for General
Applications1
This standard is issued under the fixed designation A 240/A 240M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 This specification2 covers chromium, chromium-nickel,
and chromium-manganese-nickel stainless steel plate, sheet,
and strip for pressure vessels and for general applications.
1.2 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. The values stated ineach system are not exact equivalents; therefore, each system
must be used independently of the other. Combining values
from the two systems may result in nonconformance with the
specification.
1.3 This specification is expressed in both inch-pound and
SI units. However, unless the order specifies the applicable
“M” specification designation (SI units), the material shall be
furnished in inch-pound units.
2. Referenced Documents
2.1 ASTM Standards: 3
A 370 Test Methods and Definitions for Mechanical Testing
of Steel ProductsA 480/A 480M Specification for General Requirements for
Flat-Rolled Stainless and Heat-Resisting Steel Plate,
Sheet, and Strip
A 923 Test Methods for Detecting Detrimental Intermetallic
Phase in Wrought Duplex Austenitic/Ferritic Stainless
Steels
E 112 Test Methods for Determining Average Grain Size
E 527 Practice for Numbering Metals and Alloys (UNS)
2.2 SAE Standard:
J 1086 Practice for Numbering Metals and Alloys (UNS)4
3. General Requirements
3.1 The following requirements for orders for material
furnished under this specification shall conform to the appli-
cable requirements of the current edition of SpecificationA 480/A 480M.
3.1.1 Definitions;
3.1.2 General requirements for delivery;
3.1.3 Ordering information;
3.1.4 Process;
3.1.5 Special tests;
3.1.6 Heat treatment;
3.1.7 Dimensions and permissible variations;
3.1.8 Workmanship, finish and appearance;
3.1.9 Number of tests/test methods;
3.1.10 Specimen preparation;
3.1.11 Retreatment;
3.1.12 Inspection;
3.1.13 Rejection and rehearing;3.1.14 Material test report;
3.1.15 Certification; and
3.1.16 Packaging, marking, and loading.
4. Chemical Composition
4.1 The steel shall conform to the requirements as to
chemical composition specified in Table 1 and shall conform to
applicable requirements specified in Specification A 480/
A 480M.
5. Mechanical Properties
5.1 The material shall conform to the mechanical properties
specified in Table 2.5.2 When specified by the purchaser, Charpy impact tests
shall be performed in accordance with Supplementary Require-
ment S1.
1 This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.17 on Flat-Rolled and Wrought Stainless Steel.Current edition approved March 1, 2004. Published March 2004. Originally
approved in 1940. Last previous edition approved in 2004 as A 240/A 240M – 04.2 For ASME Boiler and Pressure Vessel Code applications see related Specifi-
cation SA-240 in Section II of that Code.3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [email protected]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
4 Available from Society of Automotive Engineers, 400 Commonwealth Dr.,
Warrendale, PA 15096.
1
*A Summary of Changes section appears at the end of this standard.
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.Contact ASTM International (www.astm.org) for the latest information
A M a x i m u m , u n l e s s r a n g e o r m i n i m u m
i s i n d i c a t e d .
B D e s i g n a t i o n e s t a b l i s h e d i n a c c o r d a n c e w i t h P r a c t i c e E 5 2 7 a n d S A E J 1 0 8 6 .
C U n l e s s o t h e r w i s e i n d i c a t e d , a g r a d e
d e s i g n a t i o n o r i g i n a l l y a s s i g n e d b y t h e A m e r i c a n I r o n a n d S t e e l I n s t i t u t e ( A I S I ) .
D C a r b o n a n a l y s i s s h a l l b e r e p o r t e d t o
n e a r e s t 0 . 0
1 %
e x c e p t f o r t h e l o w - c a r b o n t y p e s ,
w h i c h s h a l l b e r e p o r t e d t o n e a r e s t 0 . 0
0 1 % .
E T h e t e r m s C o l u m b i u m ( C b ) a n d N i o b
i u m ( N b ) b o t h r e l a t e t o t h e s a m e e l e m e n t .
F W h e n t w o m i n i m u m s o r t w o m a x i m u m s a r e l i s t e d f o r a s i n g l e t y p e , a s i n t h e c a s e o f b o t h a v a l u e f r o m a f o r m u l a a n d a n a b s o l u t e v a l u
e ,
t h e h i g h e r m i n i m u m o r l o w e r m a x i m u m s h a l l a
p p l y .
G C o m m o n n a m e , n o t a t r a d e m a r k , w i d e l y u s e d , n o t a s s o c i a t e d w i t h a n y o n e p r o d u c e r .
H I r o n s h a l l b e d e t e r m i n e d a r i t h m e t i c a l l y b y d i f f e r e n c e o f 1 0 0 m i n u s t h e s u m o f t h e o t h e
r s p e c i fi e d e l e m e n t s .
I ( A l + T i ) 0 . 8
5 – 1 . 2
0 .
J N a m i n g s y s t e m d e v e l o p e d a n d a p p l i e d b y A S T M .
K C r + 3 . 3
M o + 1 6 N = 4 0 m i n .
L S 4 0 9 0 0 ( T y p e 4 0 9 ) h a s b e e n r e p l a c e
d b y S 4 0 9 1 0 ,
S 4 0 9 2 0 , a n d S 4 0 9 3 0 .
U n l e s s o t h e
r w i s e s p e c i fi e d i n t h e o r d e r i n g i n f o r m a t i o n , a n o r d e r s p e c i f y i n g S 4 0 9 0 0 o r T y p e 4 0 9 s h a l l b e s a t i s
fi e d b y a n y o n e o f S 4 0 9 1 0 ,
S 4 0 9 2 0 , o r S 4 0 9 3 0 a t t h e o p t i o n o f t h e s
e l l e r . M a t e r i a l m e e t i n g t h e r e q u i r e m e n t s o f S 4 0 9 1 0 ,
S 4 0 9 2 0 , o r S 4 0 9 3 0 , m a y a t t h e o p t i o n o f t h e
m a n u f a c t u r e r b e c e r t i fi e d a s S 4 0 9 0 0 .
M
P l a t e v e r s i o n o f C A - 6 N M .
N P r o d u c t ( c h e c k o r v e r i fi c a t i o n ) a n a l y s
i s t o l e r a n c e o v e r t h e m a x i m u m l i m i t f o r C a n d N
A U n l e s s o t h e r w i s e i n d i c a t e d , a g r a d e d e s i g n a t i o n o r i g i n a l l y a s s i g n e d b y t h e A m e r i c a n I r o n a n d S t e e l I n s t i t u t e ( A I S I ) .
B Y i e l d s t r e n g t h s h a l l b e d e t e r m i n e d b y t h e o f f s e t m e t h o d a t 0 . 2
%
i n a c c o r d a n c e w i t h T e s t M e t h o d s a n d D e fi n i t i o n s A 3 7 0 .
U n l e s s o t h e r w i s e s p e c i fi e d ( s e e S p e c i fi c a t i o n A 4 8 0 / A 4 8 0 M ,
p a r a g r a p h 4 . 1 . 1
1 ,
O r d e r i n g
I n f o r m a t i o n ) , a n a l t e r n a t i v e m e t h o d o f d e
t e r m i n i n g y i e l d s t r e n g t h m a y b e b a s e d o n t o t a l e x t e n s i o n u n d e r l o a d o f 0 . 5
% .
C E i t h e r B r i n e l l o r R o c k w e l l B H a r d n e s
s i s p e r m i s s i b l e .
D B e n d t e s t s a r e n o t r e q u i r e d f o r c h r o m
i u m s t e e l s ( f e r r i t i c o r m a r t e n s i t i c ) t h i c k e r t h a n 1
i n .
[ 2 5 m m ] o r f o r a n y a u s t e n i t i c o r d u p l e x ( a u s t e
n i t i c - f e r r i t i c ) s t a i n l e s s s t e e l s r e g a r d l e s s o f t h i c k n e
s s .
E E l o n g a t i o n f o r t h i c k n e s s ,
l e s s t h a n 0 . 0
1 5 i n .
( 0 . 3
8 m m ) s h a l l b e 2 0 %
m i n i m u m ,
i n 1 i n .
( 2 5 . 4 m m ) .
F C o m m o n n a m e , n o t a t r a d e m a r k , w i d
e l y u s e d , n o t a s s o c i a t e d w i t h a n y o n e p r o d u c e r .
G Y i e l d s t r e n g t h r e q u i r e m e n t s s h a l l n o t a p p l y t o m a t e r i a l u n d e r 0 . 0
2 0 i n [ 0 . 5
0 m m ] i n t h i c k n e s s .
H N o t a p p l i c a b l e f o r t h i c k n e s s e s u n d e r
0 . 0
1 0 i n .
[ 0 . 2
5 m m ] .
I T y p e 2 0 1 i s g e n e r a l l y p r o d u c e d w i t h a c h e m i c a l c o m p o s i t i o n b a l a n c e d f o r r i c h s i d e ( T y
p e 2 0 1 - 1 ) o r l e a n s i d e ( T y p e 2 0 1 - 2 ) a u s t e n i t e s t a b i l i t y d e p e n d i n g o n t h e p r o p e r t i e s r e q u i r e d f o r s p e c i fi c a p p l i c a t i o n s .
J R o c k w e l l C s c a l e .
K N a m i n g s y s t e m d e v e l o p e d a n d a p p l i e d b y A S T M .
L F o r S 3 2 6 1 5 ,
t h e g r a i n s i z e a s d e t e r m
i n e d i n a c c o r d a n c e w i t h t h e T e s t M e t h o d s E 1 1 2 ,
C o m p a r i s o n M e t h o d ,
P l a t e I I , s h a l l b e N o .
3 o r fi n e r .
M
P r i o r t o S p e c i fi c a t i o n A 2 4 0 – 8 9 b , t h
e t e n s i l e v a l u e f o r S 3 2 9 5 0 w a s 9 0 k s i .
N S 4 0 9 0 0 ( T y p e 4 0 9 ) h a s b e e n r e p l a c e d b y S 4 0 9 1 0 ,
S 4 0 9 2 0 , a n d S 4 0 9 3 0 .
U n l e s s o t h e
r w i s e s p e c i fi e d i n t h e o r d e r i n g i n f o r m a t i o n , a n o r
d e r s p e c i f y i n g S 4 0 9 0 0 o r T y p e 4 0 9 s h a l l b e s a t i s
fi e d b y a n y o n e o f S 4 0 9 1 0 ,
S 4 0 9 2 0 , o r S 4 0 9 3 0 a t t h e o p t i o n o f t h e s
e l l e r . M a t e r i a l m e e t i n g t h e r e q u i r e m e n t s o f S 4 0 9 1 0 ,
S 4 0 9 2 0 , o r S 4 0 9 3 0 , m a y a t t h e o p t i o n o f t h e
m a n u f a c t u r e r b e c e r t i fi e d a s S 4 0 9 0 0 .
O M a t e r i a l 0 . 0
5 0 i n ( 1 . 2
7 m m ) a n d u n d
e r i n t h i c k n e s s s h a l l h a v e a m i n i m u m e l o n g a t i o n
This section identifies the location of selected changes to this standard that have been incorporated since the A 240/A 240M-
03c issue. For the convenience of the user, Committee A01 has highlighted those changes that impact the use of this standard.
This section may also include descriptions of changes or reasons for changes, or both. (Approved Jan. 1, 2004.)
(1) Added new grade, UNS S31060, to Section 6 and Tables 1
and 2.
This section identifies the location of selected changes to this standard that have been incorporated since the A 240/A 240M-
03b issue. For the convenience of the user, Committee A01 has highlighted those changes that impact the use of this standard.
This section may also include descriptions of changes or reasons for changes, or both. (Approved Sept. 10, 2003.)
(1) In Table 2, HBN and HRB for S20100, S30451, and
S30453 were reconciled with those in Specification A 666,
annealed condition.
This section identifies the location of selected changes to this standard that have been incorporated since the A 240/A 240M-
03a issue. For the convenience of the user, Committee A01 has highlighted those changes that impact the use of this standard.
This section may also include descriptions of changes or reasons for changes, or both. (Approved May 10, 2003.)
(1) Added new alloy UNS S31277 to Tables 1 and 2.
This section identifies the location of selected changes to this standard that have been incorporated since the A 240/A 240M-
03 issue. For the convenience of the user, Committee A01 has highlighted those changes that impact the use of this standard.
This section may also include descriptions of changes or reasons for changes, or both. (Approved April 10, 2003.)
(1) Added UNS S32906 to Tables 1 and 2. (2) Added UNS S32101 to Tables 1 and 2.
This section identifies the location of selected changes to this standard that have been incorporated since the A 240/A 240M-
02a issue. For the convenience of the user, Committee A01 has highlighted those changes that impact the use of this standard.
This section may also include descriptions of changes or reasons for changes, or both. (Approved February 10, 2003.)
(1) Added a new duplex stainless steel (S32003) to Tables 1
and 2.
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