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Premium stainless steel bar forms arranged for machining and fabrication supply

Product release

Premium Quality Stainless Steel Bar Supplier with Stable Supply & Fast Delivery in China

Stainless steel bars are supplied with controlled dimensional accuracy, stable mechanical performance, and consistent material quality for machining and fabrication. The range includes round bars, flat bars, square bars, hexagon bars, and angle bars, available in common grades and customized specifications. Supported by stable sourcing channels, processing capabilities, and sufficient inventory, fast delivery and flexible mixed-container loading are available. With proven export experience, bar products are packed and prepared to support smooth downstream processing.

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Round Bar

High-Precision Machining Stock: Engineered for superior diameter control and stable properties. These bars are optimized for high-speed CNC turning, machining, and heavy-duty structural components, ensuring smooth tool performance and minimal waste.

Product rangeValue
Min. diameter (mm)2
Max. diameter (mm)500

Standard

Manufacturing StandardProduct Designation
ASTM A276Standard Specification for Stainless Steel Bars and Shapes
ASTM A479Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
ASTM A582Standard Specification for Free-Machining Stainless Steel Bars
EN 10088-3Stainless steels for general purposes

Dimensional Tolerances EN 10278

Product TypeTolerance class according to ISO 286-2
h6h7h8h9h10h11h12
DrawnRRRR
TurnedRRRR
GroundRRRRRRR
PolishedRRRRRRR

Tolerance Class to ISO

Nominal Dimension mmTolerance Class to ISO
h6h7h8h9h10h11h12
>1 to <=3 mm+0 / -0.006+0 / -0.010+0 / -0.014+0 / -0.025+0 / -0.040+0 / -0.060+0 / -0.100
>3 to <=6 mm+0 / -0.008+0 / -0.012+0 / -0.018+0 / -0.030+0 / -0.048+0 / -0.075+0 / -0.120
>6 to <=10 mm+0 / -0.009+0 / -0.015+0 / -0.022+0 / -0.036+0 / -0.058+0 / -0.090+0 / -0.150
>10 to <=18 mm+0 / -0.011+0 / -0.018+0 / -0.027+0 / -0.043+0 / -0.070+0 / -0.110+0 / -0.180
>18 to <=30 mm+0 / -0.013+0 / -0.021+0 / -0.033+0 / -0.052+0 / -0.084+0 / -0.130+0 / -0.210
>30 to <=50 mm+0 / -0.016+0 / -0.025+0 / -0.039+0 / -0.062+0 / -0.100+0 / -0.160+0 / -0.250
>50 to <=80 mm+0 / -0.019+0 / -0.030+0 / -0.046+0 / -0.074+0 / -0.120+0 / -0.190+0 / -0.300
>80 to <=120 mm+0 / -0.022+0 / -0.035+0 / -0.054+0 / -0.087+0 / -0.140+0 / -0.220+0 / -0.350
>120 to <=180 mm+0 / -0.025+0 / -0.040+0 / -0.063+0 / -0.100+0 / -0.160+0 / -0.250+0 / -0.400
>180 to <=200 mm+0 / -0.029+0 / -0.046+0 / -0.072+0 / -0.115+0 / -0.185+0 / -0.290+0 / -0.460

Finished Condition

a) Drawn, Symbol +C (BLACK BAR)
b) Turned, Symbol +SH (PEELED BAR)
c) Groud, Symbol +SL (GRINDING BAR)
d) Polished, Symbol +PL (POLISHED BAR)
The steel product shall be delivered in one or combination of the above finished conditions with or without heat treatment.

Flat Bar

Features uniform thickness and clean, sharp edges. Ideal for high-end fabrication, framework, and kitchen equipment manufacturing where precise alignment and a professional finish are critical.

Standard

Manufacturing StandardProduct DesignationGrade
EN 10088-2Stainless steel flat products for general purposes
Austenitic
ENAISI
1.43013041.4307304L1.45413211.44013161.4404316L1.4571316Ti1.4406316LN1.4438317L
EN 10028-7Stainless steel flat products for pressure purposes
ASTM A276Standard specification for stainless steel bars and shapes
ASTM A479Standard specification for stainless steel bars and shapes for use in Boilers and Other Pressure Vessels
ASTM A582Standard specification for free-machining stainless steel bars

Tolerance in Width and Thickness of Cold Rolled Flat Bars

width mmtolerance in width, +0, mmthickness mmtolerance in thickness, +0, mm
thickness <= 6.5 mmthickness > 6.5 mm0 to 0.700.04
1.50 to 9.500.120.120.70 to 1.000.04
9.50 to 25.000.100.101.00 to 25.000.05
25.00 to 50.000.150.1025.00 to 50.000.08
50.00 to 75.000.200.1050.00 to 75.000.10
75.00 to 115.000.250.1575.00 to 115.000.13

Tolerance in Width and Thickness for Hot Rolled Flat Bars

specified width mmtolerance in thickness for thickness (over), mmtolerance in thickness, mm
3.2 to 1313 to 2525 to 5050 to 100100 to 150150 to 200
+-+-+-+-+-+-+-
0 to 25.000.200.200.250.25------------------------0.400.40
25.00 to 50.000.300.300.400.400.800.80------------------0.800.80
50.00 to 100.000.400.400.500.500.800.801.400.80------------1.600.80
100.00 to 150.000.400.400.500.500.800.801.400.802.401.60------2.401.60
150.00 to 200.000.400.400.650.650.800.801.400.802.401.603.204.003.204.00
200.00 to 250.000.500.500.800.800.800.801.400.802.401.603.204.004.804.80

Supply conditions

  • Dimensional tolerances according to EN 10051
  • Special tolerances upon request
  • Control documents 2.2, 3.1, 3.2 according to EN 10204
  • On request: certification according to AD 2000 W2/W10

Angle Bar

Supplied for high-load structural applications. Our angle bars provide exceptional dimensional stability and load-bearing strength, making them the reliable choice for industrial bracing and architectural supports.

Tolerance in Width and Thickness for Angle Bars

width mmtolerance in width mm345678910
20+/-1.0+/-0.4+/-0.4------------
25+/-1.0+/-0.5+/-0.5------------
30+/-1.0+/-0.5+/-0.5+/-0.5+/-0.5--------
35+/-1.0+/-0.6+/-0.6+/-0.6+/-0.6--------
40+/-1.0+/-0.6+/-0.6+/-0.6+/-0.6+/-0.6------
45+/-2.0+/-0.6+/-0.6+/-0.6+/-0.6+/-0.6------
50+/-2.0+/-0.6+/-0.6+/-0.6+/-0.6+/-0.6+/-0.6+/-0.6--
60+/-3.0----+/-0.6+/-0.6+/-0.7+/-0.7+/-0.7--
65+/-3.0----+/-0.6+/-0.6+/-0.7+/-0.7+/-0.7--
70+/-3.0------+/-0.6+/-0.7+/-0.7----
75+/-3.0------+/-0.6+/-0.7+/-0.7+/-0.7--
80+/-3.0------+/-0.6+/-0.7+/-0.7+/-0.7--
90+/-3.0------+/-0.6+/-0.7+/-0.7+/-0.7+/-0.7
100+/-3.0------+/-0.6+/-0.7+/-0.7+/-0.7+/-0.7

*Available for both equal and unequal angle bar and inch-size.

Finish Condition and Main Grade

Finish ConditionMain Grade
a) Polished, HairLine
304304L316316L

Other grades are available, such as 310S, 904L.

b) Sandblast
c) Mill, Pickled

Delivery State and Size Range

Delivery StateSize Range
a) Hot Rolled (HR)20 x 20 x 3 - 100 x 100 x 12mm
b) Hot Rolled & Pickled (HRP)Width: 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 60mm, 65mm, 70mm, 75mm, 80mm, 90mm, 100mm.
Thickness: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 12mm
c) Made by Bending PlatesAs your request
d) Made by Welding Flat BarsAs your request

Square & Hexagon Bar

Designed with uniform cross-sections and high torque resistance. These bars are essential for precision-engineered parts, fasteners, and structural assemblies requiring dependable strength and tight tolerances.

Delivery State & Size

Delivery State & SizeMain Grade
a) Cold Rolled(Polished/HairLine): S3.0mm - S6.0mm
304304L316316L303
b) Cold Drawn(Bright/HairLine): S6.0mm - S80m
c) Hot Rolled(Sandblast/HairLine/Polished): S8.0mm - S180mm
Theoretical Weight(kg/m): S(mm) x S(mm) x 0.0068

Permitted Variations in Size of Cold Finished Hexagonal and Square Bars

Permitted Variations in Size of Cold Finished Hexagonal, and Square Bars
Specified Size,A in.[mm]Permitted Variations from Specified Size, in.[mm]B
OverUnder
1/8 to 5/16 [3.0 to 8.0], excl00.002 [0.05]
5/16 to 1/2 [8.0 to 13.0], excl00.003 [0.08]
1/2 to 1 [13.0 to 25.0], incl00.004 [0.10]
Over 1 to 2 [25.0 to 50.0], incl00.006 [0.15]
Over 2 to 3 [50.0 to 75.0], incl00.008 [0.20]
Over 3 [75.0]00.010 [0.25]

A Distance across flats.

B When it is necessary to heat treat or heat treat and pickle after cold finishing, size tolerances are double those shown in the table.

Why choose us

Built for buyers who need stainless steel round bar, flat bar, angle bar, square bar, and hex bar to arrive with the right size, tolerance, finish, documents, and packing.

  1. One stainless steel bar order can cover round, flat, angle, square, and hex profiles, reducing supplier coordination work.

  2. Accurate size matching from 2-500 mm helps buyers quote machining, shaft, fixture, and fabrication jobs faster.

  3. Tolerance routes from h6 to h12 reduce the risk of rework when stainless steel bars enter CNC or grinding processes.

  4. Grade, finish, straightness, and edge condition are confirmed before release, so the delivered bars match the actual application.

  5. MTC documents, bundle labels, and export packing checks make stainless steel bar receiving and inspection easier.