Designation: F899 11

Standard Specification for

Wrought Stainless Steels for Surgical Instruments1

This standard is issued under the fixed designation F899; 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 () indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.

TABLE 1 Typical Maximum Hardness for Selected Class 4

Martensitic Stainless Steels in The Annealed ConditionA

1. Scope*
1.1 This specification covers the chemistry requirements for
wrought stainless steels used for the manufacture of surgical
instruments. The data contained in Tables 1-4 of this specification, including typical hardness values, common heat treating cycles, and examples of selected stainless steels that have
been used for surgical instruments, is provided for reference
only. Mechanical property requirements, heat treating requirements, hardness requirements and all other requirements except chemistry are governed by the appropriate material
standards as referenced below or as agreed upon between
purchaser and supplier.
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
and are not considered standard.

Type
410
410X
416
416 Mod
420A
420B
420 Mod
420X
420C
420F
420F Mod
431
440A
440B
440C
440F
UNS S42026
UNS S42010

2. Referenced Documents
2.1 ASTM Standards:2
A276 Specification for Stainless Steel Bars and Shapes
A313/A313M Specification for Stainless Steel Spring Wire
A314 Specification for Stainless Steel Billets and Bars for
Forging
A480/A480M Specification for General Requirements for
Flat-Rolled Stainless and Heat-Resisting Steel Plate,
Sheet, and Strip
A484/A484M Specification for General Requirements for
Stainless Steel Bars, Billets, and Forgings
A555/A555M Specification for General Requirements for
Stainless Steel Wire and Wire Rods
A564/A564M Specification for Hot-Rolled and ColdFinished Age-Hardening Stainless Steel Bars and Shapes
A582/A582M Specification for Free-Machining Stainless
Steel Bars

A
B

Typical Maximum
Brinell HardnessB
210
220
262
262
220
235
255
262
262
262
262
285
285
285
285
285
260
235

Excludes billets and bars for forging.

Or equivalent Rockwell hardness.

A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
2.2 ISO Standards:3
ISO 7153/1 Instruments For SurgeryMetallic Materials
Part 1: Stainless Steel
ISO 9001 Quality Management SystemsRequirements
2.3 American Society for Quality (ASQ) Standard:4
ASQ C1 Specification of General Requirements for a Quality Program
3. Classification and Type
3.1 ClassesStainless steel material requirements for surgical instruments shall conform to one of the following classes,
as specified:
3.1.1 Class 3Austenitic Stainless Steel.
3.1.2 Class 4Martensitic Stainless Steel.
3.1.3 Class 5Precipitation Hardening Stainless Steel.
3.1.4 Class 6Ferritic Stainless Steel.

1
This specification is under the jurisdiction of ASTM Committee F04 on
Medical and Surgical Materials and Devices and is the direct responsibility of
Subcommittee F04.12 on Metallurgical Materials.
Current edition approved March 1, 2011. Published May 2011. Originally
approved in 1984. Last previous edition approved in 2010 as F899 10. DOI:
10.1520/F0899-11.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standards Document Summary page on
the ASTM website.

3
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org.
4
Available from American Society for Quality (ASQ), 600 N. Plankinton Ave.,
Milwaukee, WI 53203, http://www.asq.org.

*A Summary of Changes section appears at the end of this standard.

Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.

F899 11
TABLE 2 Typical Heat Treating Cycles and Resultant Hardness Values for Selected Class 4 Martensitic Stainless Steels

410

1850F (1010C) +
Oil quench
or air cool

410X

1875F (1024C) +
Oil quench
or air cool

416 Mod

416

Typical Hardness at
Indicated Tempering
TemperatureB

Typical HardeningA
Heat Treatment

1800F (982C) +
Oil quench

1800F (982C) +
Oil quench

(HRC)

500
700
900C
1000C
1100
500
700
900C
1000C
1100
300
500
700
900C
1000C
1100
300
500
700

260
371
482
538
593
260
371
482
538
593
149
260
371
482
538
593
149
260
371

43
43
42
30
24
46
46/47
48
44
31
38
37
37
35
30
22
41
39
41

900
1000C
1100

482
538
593

36
31
26

300
400
500
600
700
800D
300
400
500
600
700
800D
350
400
500
600
300
400
500
600
700
800D
400
500
600E
700
850

149
204
260
315
371
427
149
204
260
315
371
427
177
204
260
315
149
204
260
315
371
427
204
260
316
371
454

53
50
48
48
48
48
52
52
50
50
49
49
56/57
55
54
53
52
52
50
50
49
49
50
47
47
48
48

420A

1850F (1010C) +
Warm oil quench

420B

1900F (1038C) +
Warm oil quench

420 Mod

180F (1010C)
+ oil quench or
pressure gas

420X

1900F (1038C) +
Warm oil quench

S42010

1900F
(1038C) + Warm
Oil Quench

420C

1900F (1038C) +
Warm oil quench

420F

1900F (1038C) +
Warm oil quench

420F Mod

1900F (1038C) +
Warm oil quench

UNS
S42026

1920F
(1050C)+
oil quench or
pressure gas
1900F (1038C) +
Oil quench

431

Typical Hardness at
Indicated Tempering
TemperatureB

Typical HardeningA
Heat Treatment

Type

440A

1900F (1038C) +
Warm oil quench

440B

1900F (1038C) +
Warm oil quench

440C

1900F (1038C) +
Warm oil quench

440F

1900F (1038C) +
Warm oil quench

(HRC)

300
400
500
600
700
800D
300
400
500
600
700
800D
300
400
500
600
700
800D
400

149
204
260
315
371
427
149
204
260
315
371
427
149
204
260
315
371
427
204

58
55/56
53/54
53/54
54/55
55
52
52
50
50
49
49
53
50
48
48
48
48
56

500
600
500
700
900C
1100C
300
400
500
600
700
800D
300
400
500
600
700
800D

260
315
260
371
482
593
149
204
260
315
371
427
149
204
260
315
371
427

54/55
53/54
42
42
45
34
56/57
56
54
51/52
51
50
58/59
56/57
53/54
53
54
54

300
400
500
600
700
800D
300
400
500
600
700
800D

149
204
260
315
371
427
149
204
260
315
371
427

60
59
57
56
56
56
60
59
57
56
56
56

A
Time at temperature depends on section size. Controlled heat treating atmosphere or alternate quench media may be used in accordance with good commercial
practice.
B
Temper at least one hour at indicated temperature and air cool. Large section sizes require longer time at temperature.
C
Tempering in the range of 750/1050F (399/566C) results in decreased impact strength and reduced corrosion resistance.
D
Tempering over 800F (427C) results in reduced corrosion resistance.
E
Tempering above 600F (316C) results in reduced toughness.

4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
4.1.7

3.2 TypeWhere applicable, the commercially recognized

type of stainless steel is included in Tables 5 and 6.
4. Ordering Information
4.1 Inquiries and orders for material under this specification
shall include the following information as agreed upon by
purchaser and supplier:
2

Quantity (weight or number of pieces),

Classification, optional,
Type,
Form,
Condition (see 5.1),
Finish (see 5.3),
Mechanical properties or hardness, and

--`,`,,,`,,```,,``,`````,`,,,,``-`-`,,`,,`,`,,`---

Type

F899 11
TABLE 3 Examples of Selected Stainless Steels That Have Been Used for Surgical Instruments in Accordance with ISO 7153/1
Type

Cutting Instruments

303
304
410

Chisels and gouges, bone curettes

420A

420B
420C

420 Mod

Non-Cutting Instruments

Bone rongeurs, conchotomes, bone cutting

forceps, chisels and gouges, bone curettes,
scissors with carbide inserts
bone rongeurs, scissors
scissors, bone rongeurs, bone cutting forceps,
conchotomes, scalpels, knives, bone curettes,
chisels and gouges
bone rongeurs, conchotomes, bone cutting
forceps, chisels and gouges, bone curettes,
scissors with carbide inserts, scissors, scalpels,
knives

probes
retractors
tissue, forceps, dressing forceps, retractors,
probes
forceps, retractors, probes, forceps with bow
handles, branch forceps

tissue forceps, dressing forceps, retractors,

probes, forceps, forceps with bow handles,
branch forceps

TABLE 4 Examples of Selected Stainless Steels That Have Been Used For Surgical Instruments in the United States
Type

Cutting Instruments

302

knives, chisels, gouges, curettes

303A

chisels, curettes, knives

Non-Cutting Instruments
cannula, forceps, guides, needle vents, retractors, specula, spreaders, tendor
passers, springs
cannula, clamps, drills, forceps, handles, hammers, mallets, needle vents,
punches, retractors, rulers, screws, skin hooks, specula, spreaders, suction
tubes, tendon
strips, tongs, tunnelers, probes
cannula, clamps, forceps, holders, handles, needle vents, retractors, specula,
spreaders, suction tubes, tendon passers
specula
clamps, clip applicators, elevators, forceps, hemostats, holders, needle
holders, punches, retractors, skin hooks, sounds, spreaders, probes, dilators
clamps, forceps, hemostats, holders, punches, retractors
clamps, punches, retractors, skin hooks, spreaders
clamps, elevators, punches, rounds, dissectors, retractors, skin hooks,
needles

304
316
410
410X
416A
420B

420FA
431
440C
420 Mod

630
XM-16
XM-13
S11100
S46500

chisels, curettes, dissectors, osteotomes, reamers,

scissors with inserts
curettes, dissectors, rongeurs
chisels, curettes, dissectors
chisels, curettes, cutters, bone cutting forceps,
knives, scissors, rongeurs, scalpels, skin punches,
conchotomes
cutters

burrs
cheek retractors, insertion wrenches, orthopeadic instruments
drills, retractors, spreaders, tongs
clamps, elevators, punches, rounds, dissectors, retractors, skin hooks,
needles, cheek retractors, insertion wrenches, orthopaedic instruments, drills,
spreaders, tongs, screwdrivers

chisels, knives, osteotomes, scalpels

chisels, curettes, cutters, bone cutting forceps,
knives, scissors, rongeurs, scalpels, skin punches,
conchotomes, ostoetomes, reamers
reamers
scissors
reamers, rasps
reamers, scissors, rasps, knives
reamers, scissors, rasps, knives

drills, needles
Clamps, punches, impactor guides, strike plates, screwdrivers, hex drivers
Clamps, punches, impactor guides, strike plates, screwdrivers, hex drivers

A
It is not recommended that free-machining grades be used for critical portions of surgical instruments. Free machining grades should only be considered for instrument
applications when appropriate steps can be taken during manufacture to minimize the inherent limitations of this class of alloys (see section 10.1)
B
Types 420A, 420B, 420C, or UNS S42026 may be used depending on instrument design and application.
C
Types 440A, 440B, or 440C may be used depending on instrument design and application.

4.1.8 Applicable dimensions including size, thickness,

width, and length (exact, random, or multiples) or drawing
number.

sition and size, are furnished suitable for cold cutting when so
specified on the purchase order.)
5.2 ConditioningBillet and bar intended for forging may
be conditioned by chipping, grinding, or other suitable means
to remove injurious surface defects.
5.3 FinishTypes of finish available for bar and wire
products are cold drawn, pickled, ground, ground and polished,
or as specified in the purchase order.

5. Manufacture
5.1 ConditionStainless steels shall be furnished to the
purchaser, as specified, in the hot-finished, cold-finished,
annealed, solution-treated, solution-treated and aged, quenchhardened and tempered, or as specified by the purchaser. (Note
that highly hardenable martensitic stainless billets and bars
such as Types 420A, 420B, 420C, 420 Mod, 420F, 420F Mod.,
440A, 440B, and 440C intended for forging are commonly
annealed prior to shipment and so specified in order to avoid
the possibility of thermal cracking. Other hardenable martensitic grades such as Types 403, 410, 416, 416 Mod., and 431,
which also may require annealing, depending on their compo-

6. General Requirements for Delivery

6.1 In addition to the chemistry requirements of this specification, all requirements of the current editions of Specifications A276, A313/A313M, A314, A480/A480M, A484/
A484M, A555/A555M, A564/A564M, A582/A582M, and
A751 shall apply where applicable, as agreed upon between
purchaser and supplier.
3

F899 11
TABLE 5 Composition of Class 3, Austenitic Stainless Steels, %
UNS

Type

Carbon,
max

Phosphorus,
max

Sulfur

Silicon,
max

Chromium

Nickel

2.00 max
1.502.00

0.045
0.025

0.030 max
0.010 max

1.00
1.201.80

16.0018.00
16.018.0

6.008.00
7.09.0

Manganese

Other
Elements

S30100
S30151

301

0.15
0.070.09

S30200
S30300
S30400
S31600

302
303
304
316

0.15
0.12A
0.07A
0.07A

2.00
2.00
2.00
2.00

max
max
max
max

0.045
0.06A
0.045
0.045

0.030 max
0.150.35A
0.030 max
0.030 max

1.00
1.00
1.00
1.00

17.0019.00
17.0019.00
17.0019.00A
16.5018.50A

8.0010.00
8.0010.00
8.0011.00A
10.5013.50A

S31700

317

0.08

2.00 max

0.045

0.030 max

1.00

18.0020.00

11.0015.00

S30430
S28200

XM-7

0.1
0.15

2.00 max
17.0019.00

0.045
0.040

0.030 max
0.04 max

1.00
1.00

17.0019.00
17.0019.00

8.0010.00

0.15
0.15
0.10

4.06.0
4.08.0
7.09.0

0.045
0.040
0.060

0.030
0.040
0.030

3.04.0
2.54.5
3.54.5

15.0018.00
16.5021.00
16.018.0

4.06.0
6.010.0
8.09.0

S20161
S20162
S21800
A

Cu 0.40 max
Mo 0.501.00
N 0.070.11
N 0.10 maxA
Mo 0.70 maxA
N 0.10 maxA
Mo 2.002.50A
N 0.10 maxA
Mo 3.004.00
N 0.10 maxA
Cu 3.004.00
Mo 0.751.25
Cu 0.751.25
N 0.400.60
N 0.080.20
N 0.050.25
N 0.080.18

Denotes more restrictive limit than UNS.

TABLE 6 Composition of Class 6, Ferritic Stainless Steels, %

UNS

Type

Carbon,
max

Manganese,
max

Phosphorus,
max

Sulfur

Silicon,
Max

Chromium

S43020

430 F

0.08A

1.25

0.06

0.150.35A

1.00

16.0018.00

S18200

XM-34

0.08

1.252.5A

0.04

0.280.41A

1.00

17.5019.50

Other
Elements
Mo 0.60 max
Ni 1.00 maxA
Mo 1.502.50

Denotes more restrictive limit than UNS.

7.2 UNS designations have been added to Tables 5-8 to

provide an easy cross reference to a common numbering
system. In order to ensure consistency in the materials used for
the manufacture of surgical instruments, compositional limits
tighter than typical UNS limits have been established for

6.2 This specification compliments the ISO applicable

document covering stainless steel for surgical instruments and,
by reference, includes all of the stainless grades in ISO 7153/1.
7. Chemical Requirements
7.1 The heat analysis shall conform to the requirements as
to chemical composition specified in Tables 5-8.

TABLE 7 Composition of Class 4, Martensitic Stainless Steels, %

UNS

Type

CarbonA
A

Manganese Phosphorus
Max
Max

SulfurA

Silicon
Max

Chromium

Other
Ni 1.00 maxA
Ni 1.00 maxA
...
...
Ni 1.00 maxA
Ni 1.00 maxA
Mo 1.501.90
V 0.200.40
N 0.160.25
Ni 1.00 maxA
Ni 1.00 maxA
Cu 0.60 maxB
Ni 0.50 maxB
Mo 1.101.50
Ni 0.751.50
Ni 1.00 max
Mo 0.81.2
Ni 1.252.50
Mo 0.75 max
Mo 0.75 max
Mo 0.75 max
Cu 0.60 maxB
Ni 0.50 maxB
Ni 0.350.85
Mo 0.400.85

S41000
S41000
S41600
S41600
S42000
S42000
S42000

410
410X
416
416 Mod
420A
420B
420 Mod

0.090.15
0.160.21A
0.090.15A
0.090.15A
0.160.25A
0.260.35A
0.370.45A

1.00
1.00
1.25
1.25
1.00
1.00
0.60

0.04
0.04
0.06
0.06
0.04
0.04
0.02

0.030 max
0.030 max
0.150.27A
0.280.41A
0.030 max
0.030 max
0.005 max

1.00
1.00
1.00
1.00
1.00
1.00
0.60

11.5013.50
11.5013.50
12.0014.00
12.0014.00
12.0014.00
12.0014.00
15.0016.50

S42000
S42000
S42020

420X
420C
420F

0.360.41A
0.420.50A
0.300.40A

1.00
1.00
1.25

0.04
0.04
0.06

0.030 max
0.030 max
0.200.34A

1.00
1.00
1.00

12.0014.50
12.5014.50
12.5014.00

420F Mod

0.200.26A

2.00

0.04

0.150.27A

1.00

12.5014.00

...

0.330.43

1.00

0.03

0.030 max

1.00

12.514.5

431
440A
440B
440C
440F

0.20 max
0.600.75
0.750.95
0.951.20
0.951.20

1.00
1.00
1.00
1.00
1.25

0.04
0.04
0.04
0.04
0.06

0.030 max
0.030 max
0.030 max
0.030 max
0.150.27A

1.00
1.00
1.00
1.00
1.00

15.0017.00
16.0018.00
16.0018.00
16.0018.00
16.0018.00

0.150.30

1.00

0.04

0.03

1.00

13.515.0

S42026

S42010
A
B

--`,`,,,`,,```,,``,`````,`,,,,``-`-`,,`,,`,`,,`---

S43100
S44002
S44003
S4404
S44020

Denotes more restrictive limit than UNS.

Optional per UNS designation.

F899 11
TABLE 8 Composition of Class 5, Precipitation Hardening Stainless Steels, %
UNS

Type

Carbon,
max

Manganese,
max

Phosphorus,
max

Sulfur,
max

Silicon,
max

Chromium

Nickel

Copper

Nb+Ta

1112.5

10.2511.25

...

...

S11100

...

0.02

0.25

0.015

0.01

0.25

S17400
S17700
S45000

630
631
XM-25

0.07
0.09
0.05

1.00
1.00
1.00

0.040
0.040
0.030

0.030
0.030
0.030

1.00
1.00
1.00

15.0017.50 3.005.00
16.0018.00 6.507.75
14.0016.00 5.007.00

3.005.00
...
1.251.75

0.150.45
...
...

S45500

XM-16

0.03

0.50

0.015A

0.015A

0.50

11.0012.50 7.509.50

1.502.50

0.100.50

S13800

XM-13

0.05

0.1A

0.01A

0.008

0.10

12.2513.25 7.508.50

...

...

S46500

0.02

0.25

0.015

0.010

0.25

11.0012.50 10.7511.25

...

...

S46910

0.030

1.00

0.030

0.015

0.70

11.013.0

8.010.0

1.53.5

Other
Elements
Al 1.351.75
Mo 1.752.25
Ti 0.20.5
N 0.01 max
...
Al 0.751.50
Mo 0.501.00
Cb 8 x C min
Ti 0.901.40
Mo 0.50 max
Al 0.901.35
Mo 2.002.50
N 0.01 max
Ti 1.501.80
Mo 0.751.25
N .01 max
Al 0.150.50
Mo 3.05.0
Ti 0.501.20

Denotes more restrictive limit than UNS.

9.3 Heat treating guidelines for Class 5 precipitation hardening stainless steels are included in Specification A564/
A564M.
9.4 Specifying a hardness requirement appropriate for the
selected alloy and intended application is the responsibility of
the purchaser.

certain elements (as denoted by an asterisk). For example,

more restrictive carbon and sulfur limits are specified in Table
7.
7.3 The chemical composition requirements for Types 301,
303, 304, 316, 410, 420A, 420B, 420C, and 430F also meet the
composition requirements in ISO 7153/1.
7.4 Methods and practices relating to chemical analysis
required by this specification shall be in accordance with Test
Methods, Practices, and Terminology A751.

10. Special Information

10.1 Some examples of selected stainless steels that have
been used for various surgical instrument applications are
listed in Table 3 and Table 4 for information purposes.

8. Mechanical Requirements
8.1 Material shall conform to the mechanical property
requirements cited in the appropriate ASTM standards (see 2.1)
or shall meet the mechanical property requirements specified
by the purchaser.
8.2 When desired, Brinell hardness number (HB), Rockwell
hardness, B scale (HRB) or Rockwell hardness, C scale (HRC),
limits may be specified. Typical hardness values for selected
Class 4 martensitic stainless steels in the annealed condition
are listed in Table 1. These typical hardness values are
provided for reference only.

--`,`,,,`,,```,,``,`````,`,,,,``-`-`,,`,,`,`,,`---

NOTE 1Re-sulphurized free-machining grades can exhibit lower general corrosion resistance, lower pitting corrosion resistance, and difficulty
in polishing or welding. It is suggested that these grades be utilized only
for applications where the appropriate steps in manufacture can be taken
in order to avoid such issues thus resulting in satisfactory long-term
performance of the device.

11. Quality Program Requirements

11.1 The supplier shall maintain a quality program, such as
defined in ASQ C1 and ISO 9001.
11.2 The purchaser may audit the suppliers quality program
for conformance to the intent of ASQ C1, or other recognized
program.

9. Heat Treatment
9.1 Material shall be heat treated per the applicable referenced ASTM standard (see 2.1) for the selected stainless steel.
9.2 Commonly used heat treating cycles guidelines and the
resulting typical hardness values for selected Class 4 martensitic stainless steels are listed in Table 2 and are provided for
reference only.

12. Keywords
12.1 austenitic; ferritic; instruments; martensitic; precipitation hardenable; stainless steel; surgical

F899 11
APPENDIX
(Nonmandatory Information)
X1. STATEMENT OF RATIONALE FOR SPECIFICATION F899

X1.1 The primary reason for this specification is to characterize composition requirements to ensure consistency in
wrought materials used directly or modified by forging in the
manufacture of stainless steel surgical instruments. Mechanical
property requirements are not contained specifically within this
specification. Those requirements are found in the appropriate
specifications as referenced in section 2.1.

and heat-treating guidelines for Class 5 martensitic precipitation hardening grades are included in specification A564/
A564M.
X1.7 Examples of selected stainless steels that have been
used for surgical instrument applications are included in this
standard for information purposes.
X1.8 UNS designations are documented in the appropriate
ASTM specifications listed in 2.1, Referenced Documents.

X1.2 The chemical compositions of certain grades covered

by this specification have been modified in order to meet the
composition requirements in the most recent ISO 7153/1 standard for stainless steels used in the manufacture of surgical
instruments.

X1.9 ISO standards are listed for reference only. Although

the ISO standards listed in section 2 are similar to the
corresponding ASTM standards, they may not be identical. Use
of an ISO standard in addition to or instead of a preferred
ASTM standard may be negotiated between the purchaser and
the supplier.

X1.3 Carbon and sulfur limits have been modified to

provide an extra measure of uniformity for certain Class 4
stainless steel compositions used in the manufacture of surgical
instruments.

X1.10 The committee responsible for this specification

(F04.12) has adopted bylaws similar to the A01 committee
regarding the addition of new alloys to this specification. In
order to add a new alloy to this specification the following
minimum requirements must be satisfied:
X1.10.1 Provide statements from at least one user that the
alloy to be added is commercially available and there is a need
for inclusion in this specification.
X1.10.2 Provide chemistry and mechanical property data
from at least three commercial heats. See Table X1.1 for
example.
X1.10.3 Recommend chemical, mechanical and any special
processing requirements.
X1.10.4 Inform the subcommittee if the grade or alloy is
currently covered by patent.

X1.4 Acceptable metal conditions supplied to the instrument manufacturer include hot-finished, cold-finished, annealed, solution-treated, solution-treated and aged, or quenchhardened and tempered, the choice dependent upon the alloy
type, instrument design, and application.
X1.5 Mechanical requirements for Classes 3, 5, and 6
stainless steels covered in this specification are included in the
appropriate ASTM standards listed in Section 2.
X1.6 Typical heat-treating cycles and resultant hardness
values for selected Class 4 stainless steels are included in this
specification since the martensitic grades are a very common
class of stainless steel used for surgical instruments. Hardness

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F899 11
TABLE X1.1 Chemistry and Mechanical Property Data

NOTEElemental composition in mass-% (m/m)

C
Mn
P
S
Si
Cr
Ni
Mo
Al
Ti
N
Size
UTSA [MPa]
YSA [MPa]
AA in 5d [%]
RA [%]

Heat
HS444001

Heat
HS153902

Heat
HS360203

0.002
<0.030
<0.005
<0.0020
0.03
11.83
10.71
2.09
1.56
0.31
0.0014
9.5 mm
1772
1674
11.5
59

0.004
<0.03
<0.005
<0.0020
0.03
11.93
10.59
2.10
1.47
0.31
0.0012
72 mm
1733
1627
10.5
56

0.003
<0.03
<0.005
<0.0020
0.04
11.79
10.65
2.18
1.53
0.29
0.0011
87 mm
1780
1660
12.1
51

Annealed and aged H900/4h.

SUMMARY OF CHANGES
Committee F04 has identified the location of selected changes to this standard since the last issue (F899 10)
that may impact the use of this standard. (Approved March 1, 2011.)
(1) Added UNS S11100 to Table 4 and Table 8.

(2) Added Table X1.1.

Committee F04 has identified the location of selected changes to this standard since the last issue
(F899 091) that may impact the use of this standard. (Approved Dec. 1, 2010.)
(1) Added Specification A313/A313M to 2 and 6.1 and UNS
S30151 to Table 5.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned
in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk
of infringement of such rights, are entirely their own responsibility.
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