Steel grade Stainless Acid-resistant Acid-resistant Acid-resistant Acid-resistant
Designation: 7)
ISO group
ISO no
Bufab Stainless
SS 14.
Avesta
Fagersta
Sandvik
Uddeholm
EN Name 1)
EN 10027-2
USA (AISI) 1)
U K (BS) 1)
France (AFNOP) 1)
Italy (UNI) 1)
Japan (JIS) 1)		 A2
(11)
A2
2333
832MV
P350
5P10
3MM
X5CrNi 18-10
1.4301
304
304S15
Z6CN 18-09
X5Cr 1810
304		 A4
20a
Bumax
2343
832 SK
P440
5R60
24
X3CrNiMo 17133
1.4436
-
-
Z6CND 17-12
X5CrNiMo 1713
-		 A4
20
A4
2347
832SF
P425
-
14
X5CrNiMo 17122
1.4401
316
316S16
Z6CND 17-11
X5CrNiMo 1712
316		 -
-
SÅ10
-
254SM0
-
-
-
-
-
S31254
-
-
-
-		 -
-
SÅ8
2324
453S
P640
10RE51
44
X3CrNiMoN 2752
(1.4460)
329
-
-
-
329J1
Chemical compositions:
Carbon C %
Chromium Cr %
Nickel Ni %
Molybdenum Mo %
Cuppar Cu %
Stabiliser Ti/Nb %		 max.0.07
17-19
8-11
-
-
-		 max. 0,03
16,5-18,5
11,0 – 14,5
2.5-3,0
-
-		 max. 0.07
16,5-18,5
10-13
2-2,5
-
-		 max- 0.02
19,5-20,5
17,5-18.5
6-6,5
0.5-1.0
0,18-0.22		 max .0.10
24-27
4,5-7.0
1,3-1,8
-
-
Structurer Austenitic Austenitic Austenitic Austenitic Ferritic-
Austenitic
Physical data
Magnetic
Scalling temperature.
In air appr °C

No 3)

850

 No

850		 No

850		 No

1000		 Yes

1070
Machining properties
Hardenabillit y
Weldabillity		 No
Very good 4)		 No
Excellent 5)		 No
Very good 5)		 No
Excellent		 No
Good 6)
Notes At Ni–content 9%
And a high degree
of cold working
there is a risk that
A2 steel will
become magnetic.
A2 is suitable for
Normal corrosion
expose.
Frequently used
in food processing
and chemical
Industry.		 Used in the cellul-
lose and in Pulp &
Paper industry.
The low carbon
and the increased
content of Cr, Ni
and Mo gives the
steel excellent
resistance to
corrosion.		 Good resistance
to corrosion.
Greater risk of
crevice corrosion
and pitting than
for SS 2343
in chloride bearing
environments.		 Excellent
resistance to
corrosion.
Resistant to
seawater
Suitable for
seabed
constructions.		 Has basically the
same area of
applications as SS-
2343 and has higher
strength in soft
condition.
The steel has poor
machining pro-
perties and should
be avoided or re-
placed by EN1.4462

more:

Steel grade Stainless Stainless Stainless Stainless
Heat -resistant		 Acid-resistant
Heat -resistant
Designation: 7)
ISO group
ISO no
Bufab Stainless
SS 14.
Avesta
Fagersta
Sandvik
Uddeholm
EN Name 1)
EN 10027-2
USA (AISI) 1)
U K (BS) 1)
France (AFNOP) 1)
Italy (UNI) 1)
Japan (JIS) 1)		 (C1)
4
C1
2303
-
R700
-
1
-
1.4021
420
420S37
Z20C13
X20Cr13
420J1		 C3
9b
C3
2321
-
R705
-
22
X17CrNil62
1.4057
431
431S29
Z15CN16-02
X16CrNi16
431		 F1 2)
-
Fl
2325
-
P249
-
ELI-T 18-2
-
1.4522
-
-
-
-
-		 -
-
SÅ7
2570
-
-
-
-
-
1.4980
660
Z5NCTDV25-15B
-
-
-		 -
H15
SÅ3
2361
-
R820
7RE12
25
-
(1.4845)
310S
310S16
Z8CN 25-20
X6CrNi 2520
310S
Chemical compositions:
Carbon C %
Chromium Cr %
Nickel Ni %
Molybdenum Mo %
Cuppar Cu %
Stabiliser Ti/Nb %		 0,18-0,25
12-14
-
-
-
-		 0,17-0,25
16-18
1,25-2.5
-
-
-		 C+N=max. 0.040
max. 0,025
17-19
max. 0.25
1,8-2,3
-
10x% (C+N)		 max 0,08
13,5-16
24-27
1-1,5
V 0,1-0,5
Ti 1,9-2,3		 max. 0.08
24-26
19-22
-
-
-
Structurer Ferritic-
markensitic		 Martensitic Ferritic Austenitic Austenitic
Physical data
Magnetic
Scalling temperature.
In air appr °C		 Yes

820		 Yes

830		 Yes

850		 No

1000		 No

1150
Machining properties
Hardenabillit y
Weldabillity		 Yes
Poor		 Yes
Poor		 No
Good		 Yes
Poor		 No
Very good
Notes Good mechanical
properties in
hardened condition.
The steel is fre-
quently used in
Exhaust system
for the automotive
industry.
SS2303 has limi-
ted resistance to
corrosion.		 Better resistance
to corrosion than
SS 2302.
Good mechanical
properties in
hardened
condition.		 Suitable at
elevated
temperatures
and when pH
is below 4.		 Suitable at elevated
temperature
appr 700ºC.
Good mechanical
Properties in age-
hardened condition.
SS2570 is frequently
used for fasteners
in turbochargers
and exhaust system.
Good resistance
to corrosion.		 Excellent heat
resistance.
Should not be
used in sulp-
hurous gases
at temperatures
> 700ºC.
Good resistance
to corrosion.

1) Given as reference. Underlined standard applies.
2) Please see also “choice of material” and ISO 3506.
3) When Ni-content is <% and with higher strength grades some magnetisation may occur.
4) With annealed weld-joint insensitive to intergranular corrosion .
5) Insensitive to intergrannular corrosion up to appr 500 oC.
6) When the weld-joint is annealed.

Bufab Stainless AB, SE-693 03 Svartå - Sweden
Phone +46 585 521 00 - Fax +46 585 521 15 - stainless.svarta@bufab.com