Austenitic Stainless Steel

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The austenitic stainless steels generally provide better corrosion resistance compared to ferritic stainless steels, at significantly higher cost due to the large nickel addition.

The following tables contain a list of the materials available. For more complete coverage of properties, reference MPIF Standard 35, ASTM B783, ISO 5755, DIN 30910-4, and JIS Z2550, and download the technical information bulletins of interest. Standard powder metal materials are defined in North America by MPIF Standard 35 and ASTM B783, essentially equivalent standards. German PM steels are listed in DIN 30910-4, or more recently, ISO 5755. Japan steels are listed in JIS Z2550, with grade names changing with the revision from 1989 to 2000.

TYPE GRADES DESCRIPTION
303L APMI/MPIF SS-303L,
JIS P3506
304L type with manganese for improved machinability at the expense of some corrosion resistance.
303N APMI/MPIF SS-303N1, SS-303N2, ISO FL303-N, JIS P3504, P3505 Sintered in an atmosphere containing nitrogen for higher strength and hardness at the expense of some corrosion resistance.
304L SSI-304L-HTS, APMI/MPIF SS-304H, SS-304L, JIS P3516 Low carbon and nitrogen for best corrosion resistance.
304LCb SSI-304LCb-HTS 304L with a small columbium (niobium) addition to prevent weld sensitization.
304N APMI/MPIF SS-304N1, SS-304N2, ISO FL304-N, JIS P3514, P3515 304 sintered in an atmosphere containing nitrogen for higher strength and hardness at the expense of some corrosion resistance.
316L SSI-316L-HTS, APMI/MPIF SS-316H, SS-316L, ISO-FL316, JIS P3526 304L type with molybdenum added for improved corrosion resistance. Low carbon and nitrogen for best corrosion resistance.
316LCb SSI-316LCb-HTS 316L with a small columbium (niobium) addition to prevent weld sensitization.
316N APMI/MPIF SS-316N1, SS-316N2, ISO FL316-N, DIN Sint-C40, Sint-D40, JIS SMS 1025, SMS 1035, P3524, P3525 316 sintered in an atmosphere containing nitrogen for higher strength and hardness at the expense of some corrosion resistance.

Austenitic Stainless Steel – As-sintered


Chemistry Typical Properties
GRADE Fe C N Cr Ni Mo Nb (Cb) Density g/cm 3 Tensile Strength ksi (MPa) Yield Strength ksi (MPa) Elongation % Unnotched Impact Energy ft-lb (J) Apparent Hardness HRB
SS-303L-HTS Bal <0.03 <0.03 17-19 8-13 - - 6.6
6.9
39 (270)
48 (330)
17 (120)
24(170)
17
20
40 (54)
55 (74)
21
35
SS-303N

SS-303N-HTS
Bal <0.03 0.2-0.6 17-19 8-13 - - 6.4

6.5
6.9
39 (270)

55 (380)
68 (470)
32 (220)

42 (290)
45 (310)
<1

5
10
4 (5)

19 (26)
35 (47)
62

63
70
SS-304H

SS-304L-HTS

SSI-304L-HTS
Bal <0.03 <0.03 18-20 8-12 - - 6.6

6.6
6.9
7.1
40 (280)

43 (300)
57 (390)
55 (380)
25 (170)

18 (120)
26 (180)
26 (180)
10

23
26
25
(27)

45 (61)
80 (108)
-
35

30
45
20
SS-304N

SS-304N-HTS
Bal <0.08 0.2-0.6 18-20 8-12 - - 6.4

6.5
6.9
43 (300)

57 (390)
70 (480)
38 (260)

40 (280)
45 (310)
<1

10
13
4 (5)

25 (34)
55 (74)
61

62
8
SS-316H

SS-316L-HTS

SSI-316L-HTS
Bal <0.03 <0.03 16-18 10-14 -   -   6.6

6.6
6.9
7.2
35 (280)

41 (300)
57 (390)
(390)
25 (170)

20 (120)
30 (180)
(180)
7

18
21
25
20 (27)

35 (47)
65 (88)
-
33

20
45
45
SS-316N

SS-316N-HTS
Bal <0.03 0.2-0.6 16-18 10-14 2-3 - 6.4

6.5
6.9
41 (280)

60 (410)
70 (480)
34 (230)

39 (270)
45 (310)
<1

10
13
5 (7)

28 (38)
48 (65)
59

62
65

Density ranges for the materials listed are typically for single-pressed parts. Higher densities can be achieved with double-pressing. “HTS” indicates the material has been “high temperature sintered”, i.e. sintered at a minimum temperature of 2200 F (1200 C).