SS Round Bar METRIC Sizes & IMPERIAL Sizes

Stainless Steel Round bar METRIC Sizes

Generally in 3.000 to 3.200 Stainless Steel Round Bar Metre lengths although in certain sizes longer lengths are available. Commonly in Grades Stainless Steel Round Bar T303, T304, T316, T321, T410, T420 & Grade T431.

Stainless Steel Round Bar IMPERIAL Sizes

Generally in 3.000 to 3.200 SS round bar Metre lengths although in certain sizes longer lengths are available. Commonly in Stainless Steel Round Bar Grades T303, T304, T316, T321, T410, T420 & Grade T431.

3MM DIAMETER Stainless Steel Round bar
1/8" DIAMETER Stainless Steel Round bar
4MM DIAMETER Stainless Steel Round bar
3/16" DIAMETER Stainless Steel Round bar
5MM DIAMETER Stainless Steel Round bar
1/4" DIAMETER Stainless Steel Round bar
6MM DIAMETER Stainless Steel Round bar
9/32" DIAMETER Stainless Steel Round bar
7MM DIAMETER Stainless Steel Round bar
5/16" DIAMETER Stainless Steel Round bar
8MM DIAMETER Stainless Steel Round bar
3/8" DIAMETER Stainless Steel Round bar
9MM DIAMETER Stainless Steel Round bar
7/16" DIAMETER Stainless Steel Round bar
10MM DIAMETER Stainless Steel Round bar
1/2" DIAMETER Stainless Steel Round bar
12MM DIAMETER Stainless Steel Round bar
9/16" DIAMETER Stainless Steel Round bar
14MM DIAMETER Stainless Steel Round bar
5/8" DIAMETER Stainless Steel Round bar
15MM DIAMETER Stainless Steel Round bar
3/4" DIAMETER Stainless Steel Round bar
16MM DIAMETER Stainless Steel Round bar
13/16" DIAMETER Stainless Steel Round bar
17MM DIAMETER Stainless Steel Round bar
7/8" DIAMETER Stainless Steel Round bar
18MM DIAMETER Stainless Steel Round bar
1" DIAMETER Stainless Steel Round bar
20MM DIAMETER Stainless Steel Round bar
1.1/8" DIAMETER Stainless Steel Round bar
22MM DIAMETER Stainless Steel Round bar
1.1/4" DIAMETER Stainless Steel Round bar
24MM DIAMETER Stainless Steel Round bar
1.3/8" DIAMETER Stainless Steel Round bar
25MM DIAMETER Stainless Steel Round bar
1.1/2" DIAMETER Stainless Steel Round bar
30MM DIAMETER Stainless Steel Round bar
1.5/8" DIAMETER Stainless Steel Round bar
32MM DIAMETER Stainless Steel Round bar
1.3/4" DIAMETER Stainless Steel Round bar
35MM DIAMETER Stainless Steel Round bar
1.7/8" DIAMETER Stainless Steel Round bar
36MM DIAMETER Stainless Steel Round bar
2" DIAMETER Stainless Steel Round bar
38MM DIAMETER Stainless Steel Round bar
2.1/8" DIAMETER Stainless Steel Round bar
40MM DIAMETER Stainless Steel Round bar
2.1/4" DIAMETER Stainless Steel Round bar
42MM DIAMETER Stainless Steel Round bar
2.3/8" DIAMETER Stainless Steel Round bar
45MM DIAMETER Stainless Steel Round bar
2.1/2" DIAMETER Stainless Steel Round bar
50MM DIAMETER Stainless Steel Round bar
2.5/8" DIAMETER Stainless Steel Round bar
60MM DIAMETER Stainless Steel Round bar
2.3/4" DIAMETER Stainless Steel Round bar
70MM DIAMETER Stainless Steel Round bar
3" DIAMETER Stainless Steel Round bar
80MM DIAMETER Stainless Steel Round bar
3.1/4" DIAMETER Stainless Steel Round bar
90MM DIAMETER Stainless Steel Round bar
3.1/2" DIAMETER Stainless Steel Round bar
100MM DIAMETER Stainless Steel Round bar
3.3/4" DIAMETER Stainless Steel Round bar
200MM DIAMETER Stainless Steel Round bar
4" DIAMETER Stainless Steel Round bar
 
4.1/4" DIAMETER Stainless Steel Round bar
 
4.1/2" DIAMETER Stainless Steel Round bar
 
4.3/4" DIAMETER Stainless Steel Round bar
 
5" DIAMETER Stainless Steel Round bar
 
5.1/4" DIAMETER Stainless Steel Round bar
 
5.1/2" DIAMETER Stainless Steel Round bar
 
6" DIAMETER Stainless Steel Round bar
 
6.1/4" DIAMETER Stainless Steel Round bar
 
6.1/2" DIAMETER Stainless Steel Round bar
 
7.1/2" DIAMETER Stainless Steel Round bar
 
10" DIAMETER Stainless Steel Round bar
 
12" DIAMETER Stainless Steel Round bar

Stainless Steel Round bar Manufacturer Stockist, Suppliers & Dealers in Durban, Australia, South Africa, Adelaide, Delhi, Brisbane, Cape Town, Australia, Auckland, Germany, Europe, Jakarta, Philippines, Pretoria, Port Elizabeth, Korea, Johannesburg, Houston, Uae, Uk, Thailand, Usa, Ontario, Taiwan, Houston Tx, Melbourne, Gujarat, Ahmedabad

STAINLESS STEEL TYPE SPECIFICATION CHARACTERISTIC AND TYPICAL
APPLICATION
CHEMICAL COMPOSITION
AUSTENTIC Unified Numbering
System (UNS)
AMS ASTM ASME Chromium Nickel Carbon Manganese Sulfur Others
AUSTENTIC 303 (S30300) 5640 A-484
A-582
- Free-machining modification of Type 302/304, for
heavier cuts. Screw machine products; shafts; valves;
bolts; bushings; nuts.
17.00-
19.00
8.00-
10.00
.15 2.00 .15
Min.
-
AUSTENTIC 304 (S30400) 5639 A-484
A-182
A-276
A-479
SA-182
SA-479
Low-carbon modification of Type 302 for restriction of
carbide precipitation during welding. Chemical and food
processing equipment; brewing equipment; cryogenic
vessels; gutters; downspouts; flashings
18.00-
20.00
8.00-
10.50
.08 2.00 .03 -
AUSTENTIC 304L (S30403) 5647 A-182 A-479
A-193 A-484
A-276
SA-182
SA-193
SA-479
Extra-low-carbon modification of Type 304 for further
restriction of carbide precipitation during welding. Coal
hopper linings; tanks for liquid fertilizer and tomato paste.
18.00-
20.00
8.00-
12.00
.03 2.00 .03 -
AUSTENTIC 316 (S31600) 5648 A-182 A-484
A-276 A-193
A-479
SA-182
SA-479
SA-193
Higher corrosion resistance than Types 302 and 304;
high creep strength. Chemical and pulp handling equipment;
photographic equipment; brandy vats; fertilizer
parts; ketchup cooking kettles; yeast tubs.
16.00-
18.00
10.00-
14.00
.08 2.00 .03 Mo
2.00--
3.00
AUSTENTIC 316L (S31603) 5653 A-182 A-484
A-276 A-193
A-479
SA-182
SA-479
SA-193
Extra-low-carbon modification of Type 316. Welded
construction where intergranular carbide precipitation
must be avoided. Type 316 applications requiring
extensive welding.
16.00-
18.00
10.00-
14.00
.03 2.00 .03 Mo
2.00--
3.00
AUSTENTIC 321 (S32100) 5645 A-182 A-193
A-276 A-479
SA-182
SA-479
SA-193
Stabilized for weldments subject to sever corrosive conditions,
and for service from 800 to 1600 F. Aircraft
exhaust manifolds; boiler shells; process equipment;
expansion joints; cabin heaters; fire walls; flexible couplings;
pressure vessels.
17.00-
19.00
9.00-
12.00
.08 2.00 .03 Ti
5X (C+N)
Min. to
0.70 Max.
AUSTENTIC 347 (S34700) 5646 A-182 A-193
A-276 A-479
SA-182
SA-193
SA-479
Similar to Type 321 with higher creep strength. Airplane
exhaust stacks; welded tank cars for chemicals; jet
engine parts.
17.00-
19.00
9.00-
13.00
.08 2.00 .03 Cb +Ta
10XC
Min.
AUSTENTIC 316 Pump Shaft
(S31600)
5648 A-276
A-479
- Pump shaft quality bar is manufactured with special surface
finish, close diameter tolerance, controlled mechanical
properties and precision straightness.
16.00-
18.00

10.00-
14.00
.08 2.00 .03 Mo
2.00--
3.00
AUSTENTIC UNS (S20910)
(XM-19)
5764 A-193
Grade B8R
A-276
Grade XM-19
A-479
Grade XM-19
- NITRONIC 50® bars offer an excellent combination of
high strength and corrosion resistance. This austentic
stainless steel has corrosion resistance better than Type
316 and 317, plus almost twice the yield strength of
those grades.
20.50-
23.50
11.50-
13.50
.06 4.00-
6.00
.03 N .20-.40
Mo 1.5-3.0
Cb .10-.30
V .10-.30
AUSTENTIC NITRONIC 50® (15)
High Strength
(S20910)
5764
(Chem
Only)
A-193
Grade B8R
(Chem Only)
A-276
Grade XM-19
A-479
Grade XM-19
- NITRONIC 50® bars in the HS condition feature extremely
high tensile and yield strength properties. These high
mechanical properties are accomplished through cold
working at the producing mill.
20.50-
23.50
11.50-
13.50
.06 4.00-
6.00
.03 N .20-.40
Mo 1.5-3.0
Cb .10-.30
V .10-.30
AUSTENTIC UNS (S21800) 5848 A-193
Grade B8S
A-276
A-479
- NITRONIC 60® is an economical galling and wear resistant
stainless steel. Better corrosion resistance than Type
304 and superior pitting resistance to Type 316 plus
twice the yield strength of Type 304.
16.00-
18.00
8.00-
9.00
.10 7.00-
9.00
.03 Si
3.50-
4.50
N .08-.18
MARTENSITIC 410
(S41000)
2303
5612
5613

A-276 A-314
A-479 A-193
SA-479
SA-193
General purpose heat treatable type. Machine parts;
pump shafts; bolts; bushings; coal chutes; cutlery; fishing
tackle; hardware; jet engine parts; mining machinery;
rifle barrels; screws; valves.

11.5-
13.50
- .15 1.00 .03 -
MARTENSITIC 410 Quench &
Dbl Temp.
A-484 API 6A
NACE MR-01-91
Quenched and doubles tempered form of 410 for parts
used in hydrogen sulfide.

11.5-
13.50
- .15 1.00 .03 -
MARTENSITIC 416(6)
(S41600)

5610
A-484
A-582
-
Free-machinery modification of type 410 for heavier cuts.
Aircraft fittings; bolts; nuts; fire extinguisher inserts; rivets; screws.
12.00-
14.00
- .15 1.25 .15
Min.
-
MARTENSITIC 416HT
(S41600)

5610
A-484
A-582
- Pre-hardened 416 for finished machine parts
Rc26-32.
12.00-
14.00
- .15 1.25 .15
Min.
-
MARTENSITIC 440C
(S44004)
5630
A-276 - Yields highest hardnesses of hardenable stainless steels.
Balls; bearings; races; nozzles; balls and seats for oil
well pumps; valve parts.
16.00-
18.00
.75 .95-
1.20
1.00 .03
Mo
.40–.65
Cu. 50
MARTENSITIC 440C BQ
(S44004)
5630
5880
A-276
A-756
- Martensitic stainless with high strength, corrosion resistance and hardness obtained by low temperature heat
treatment. Gear; cams; cutlery; shafting; aircraft parts.
16.00-
18.00
.75 .95-
1.20
1.00 .03 Mo
.40–.65
Cu. 50
MARTENSITIC 416 Pump
Shaft
(S41600)

5610
A-582 - Pump shaft quality bar is manufactured with special surface
finish, close diameter tolerance, controlled mechanical
properties and precision straightness.
12.00-
14.00
- .15 1.25 .15
Min.
-
MARTENSITIC 420
Modified
-
A-370
E-23
E-112
A484
- 420 modified is an API 6A approved 13% chromium
martensitic stainless steel intended for use in structural
and pressure containing oil tool parts used in CO2 environments.
12.50-
14.00
.20 .18-
.22 1.00 .005 —
       
DUPLEX 2205
(S31803)
- A-182
A-276
SA-182 2205 is a duplex (austentic-ferritic) stainless steel possessing
high strength and good resistance to stress corrosion
used for heat exchangers, oil and gas industry
equipment.
21.00-
23.00
4.50-
6.50
.03 2.00 .02 -
PRECIPITATION
HARDENING
13Cr-8Ni(7)
(S13800)

5629
2300

A-564
(Grade XM-13)
- High strength, ductility and toughness both longitudinally
and transversely. Excellent general corrosion resistance
as well as high degree of resistance to stress corrosion
cracking. Aircraft structural components, landing gear
parts, shafts, valves, fittings, fasteners and
petrochemical applications.
12.25-
13.25

7.5-
8.5
.05 .20 .008
P .010
AI .90-1.35
Mo 2.00–
2.50
PRECIPITATION
HARDENING
15Cr-5Ni(7)
(S15500)

2300
5659

A-564
(Grade XM-12)
- Martensitic stainless with high strength, corrosion resistance
and hardness obtained by low temperature heat
treatment. Gear; cams; cutlery; shafting; aircraft parts.

14.00-
15.5

3.50-
5.50
.07 1.00 .03 Cu 2.50-
4.50
Cb+Ta
.15–.45

 

TYPICAL MECH. PROPERTIES SIZE RANGE—INCHES SIZE RANGE—INCHES TYPE
Tensile 103
P.S.I.
Yield 103 P.S.I.
.2% Offset
Elongation %
2 in.
Reduction
in Area %
Hardness Brinell Rounds image Hexagons
image
Squares image Flats image Angles image AISI TYPE
Unified Numbering
System (UNS)
90 35 50 55 160 5/64–10 3/16–3 3/16–2 - - 303
(S30300)
SS 303
85 35 60 70 170 3/32–20 3/8–3 1/4–2 T 1/8–1
W 1/2–6
T 1/8–3/8
W 3/4–4
304
(S30403)
SS 304
75 30 60 70 160 3/16–20 - - - - 304-L
(S30403)
SS 304L
80
35 55 65 170 1/8–20 7/16–2-1/2 3/16–1-1/2 T 3/16–1
W 1–4
T 1/8–3/8
W 1–3
316
(S31600)
SS 316
75 30 55 65 160 3/16–20 - - T 3/16–1
W 1–4
T 1/8–3/8
W 1–4
316-L
(S31603)
SS 316L
85 35 55 65 150 1/4–6 - - - - 321
(S32100)
SS 321
90 30 50 65 170 1/8–5-1/2 - - - - 347
(S34700)
SS 347
75 30 30 40 149 3/4–3-7/16 - - - - 316 Pump
Shaft
(S31600)
SS 316
100 55 35 55 - 3/4–6 - - - - UNS
(S20910)
(XM-19)
XM-19
135 105 20 50 - 1-1/4–2 - - - - NITRONIC 50®
High Strength
(S20910)
SS NITRONIC 50
95 50 35 55 - 1-1/4–4 - - - - UNS
(S21800)
 
75 40 35 70 155 1/2–7-1/2 - - - - 410
(S41000)
SS 410
100 80 17 35 241
Max.
2–15 - - - - 410
Quench &
Dbl Temp.
SS 410
75 40 30 60 155 3/32–6-1/2 3/8–2 3/16–2 - - 416
(S41600)
SS 416
- - - - - 1/4–7 - - - - 416HT
(S41600)
SS 416HT
110 65 14 25 230 1/4–8 - - - - 440C
(S44004)
SS 440C
- - - - - 1/2–6 - - - - 440C BQ(7)
(S44004)
SS 440C
100
85 20 46 262 5/8–3-7/16 - - - - 416 Pump
Shaft
(S41600)
SS 416
100
80 20 40 241 3-1/4–9 - - - - 420
Modified
SS 420
90 65 25 - 290 1–10 - - - - 2205
(S31803)
Duplex 2205

Stainless Bar
Minimum Recommended Stock

Cold Drawn;
Up to & Incl. 5/16”
Over 5/16”
Rounds - Hexagons - Squares
.003 per side except 440-C
1% of Diameter per Side
Centerless Ground:
All Ground **Defect Free** within the Standard Size Tolerances
Example: 1-1/2” Rd. TOL is ±.003
Material must not have any defect under –.003
Rough Turned:
All “R.T.” sizes are produced on the plus side.
Material must be defect free on size.
Example: 5” Rd. HR-RT must be defect free at 5”

HR-A&P Flats & Squares and Cold Drawn Flats
Recommended Machining Allowances

(B) Removal From Thickness Each Surface Specified Thickness (D) (Inches)
(A)
SPECIFIED
WIDTH
1/8-1/2” 1/2-1” 1-2” 2-3” (C)
REMOVAL FROM WIDTHEACH
SURFACE
Up to 1” Incl.
Over 1-2” Incl.
Over 2-3” Incl.
Over 3-4” Incl.
Over 4-6” Incl.
.008
.012
.015
.015
.015
.010
.015
.020
.020
.020

.031
.031
.031
.031
——
.047
.047
.015
.031
.047
.062
.093
(A) Select the “Width” first and then read across to:
(B) Select the reading–this is the stock removal for the thickness per side
(C) Continue across on same line for the readings for width
(D) As measured form the minimum of the tolerance

TOLERANCES-STAINLESS STEEL FLAT BARS

HOT ROLLED FLATS EDGE CONDITIONED FLATS
Thickness
Variation
SPECIFIED WIDTHS Thickness
Specified
Thickness
Tolerance
Width
To 1” Tolerance
To 1” Tolerance
Incl.
Over 1”
to 2”
Over 2”
to 4”
Over 4”
to 6”
Over 6”
to 8”
1/8 – 1/2 ± .008 ± .012 ± .015 ± .015 ± .016 *1/8” ±.010 +.030
–.000
Over 1/2 to 1 Incl. ± .010 ± .015 ± .020 ± .020 ± .025 *3/16” +.020
–.010
+.030
–.000
Over 1 to 2 Incl. - ± .031 ± .031 ± .031 ± .031 *1/4” +.020
–.010
+.030
–.000
Width
Variation
3/8” +.060
–.010
+.0625
–.000
Over .015 .031 .062 .093 .125 1/2” +.060
–.010
+.125
–.000
Under .015 .031 .031 .062 .156      

 

Stainless Steel Round bar Tolerances

ROUNDS COLD FINISHED

Under 5/16

±.001

5/16 to Under 1/2

±.0015

   

1/2 to Under 1

±.002

 

 

1 to Under 1-1/2

±.0025

 

 

1-1/2 to 4 Incl.

±.003

 

 

Over 4 to 4-1/2 Incl.

±.005

 

 

Over 4-1/2 to 6 Incl.

±.008

ROUNDS–HOT ROLLED & ROUGH TURNED

Over 2 to 2-1/2

+1/32 –0

Out of Rd.

0.23

 

 

 

Over 2-1/2 to 3-1/2

+3/64 –0

.035

 

 

 

Over 3-1/2 to 4-1/2

+1/16 –0

.046

 

 

 

Over 4-1/2 to 5-1/2

+5/64 –0

.058

 

 

 

Over5-1/2 to 6-1/2

+1/8 –0

.070

 

 

 

Over 6-1/2 to 8

+5/32 –0

.085

 

 

 

Over 8 to 12

+3/16 –0

.093

 

 

 

Over 12 to 15

+7/32 –0

.109

 

 

 

Over 15 to 20

+1/4 –0

.125

SQUARE AND HEXAGON BAR COLD FINISHED

Under 5/16

±.000–.002

 

 

5/16 to Under 1/2

±.000–.003

 

 

1/2 to 1 Incl.

±.000–.004

 

 

Over 1 to 2 Incl.

±.000–.006

 

 

Over 2 to 3 Incl.

±.000–.008

 

 

Over 3

±.000–.011

PUMP SHAFT QUALITY

 

 

Diameter Over

Tolerance Under

 

 

 

3/4 to Under 1

+.000

–.002

 

 

 

1 to Under 1-1/2

+.000

–.0025

 

 

 

1-1/2 to 4 Incl.

+.000

–.003

 

 

 

Over 4 to 4-1/2

+.000

–.005

 

 

 

Over 4-1/2 to 5 Incl.

+.000

–.008

STRAIGHTNESS TOLERANCE

Hot Finished

Cold Finished

1/8 Inch in Any 5 Ft.,

1/16 Inch in Any Ft.,

But May Not Exceed

But May Not Exceed

1/8 x No. of Feet in Length

1/16 x No. of Feet in Length

5

5

 

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