Womic Stainless Steel Co., Ltd
Corrosion Resistance: Excellent resistance to pitting and crevice corrosion in chloride-containing environments, seawater, and aggressive chemical media, thanks to 2–3% molybdenum content. The low carbon 316L version provides enhanced resistance to intergranular corrosion after welding.
High Mechanical Strength: Good tensile and yield strength with excellent ductility for load-bearing structural applications and machinery components.
Superior Weldability: 316L grade ensures low carbon content for superior weld performance, with reduced risk of intergranular corrosion in welded fabrications. Suitable for TIG, MIG, and laser welding.
Precision Dimensional Tolerances: Tight thickness and width tolerances (EN 10058, DIN 593, ASTM A484) ensure consistent material for fabrication and machining.
Smooth Surface Quality: Available in black (hot-rolled), pickled, and polished finishes for various industrial and architectural applications.
Excellent Machinability: Good chip formation and surface finish characteristics for milling, drilling, punching, and shearing operations.
Square Edges: Precision-rolled square edges for accurate fitting and welding.
International Certifications: Flat bars can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with ASME, ASTM, EN, and JIS standards.
|
Standard |
Description |
Corresponding 316/316L Grade |
|
ASTM A276 / A479 |
Standard specification for stainless steel bars and shapes |
316 / 316L |
|
ASTM A484 |
General requirements for stainless steel bars and shapes |
316 / 316L |
|
EN 10058 |
European standard for hot-rolled flat steel bars |
1.4401 / 1.4404 |
|
EN 10088-3 |
European standard for stainless steel bars for general purposes |
1.4401 / 1.4404 |
|
JIS G4303 |
Japanese standard for stainless steel bars |
SUS316 / SUS316L |
|
JIS G4318 |
Japanese standard for cold-finished stainless steel bars |
SUS316 / SUS316L |
|
GB/T 1220 |
Chinese standard for stainless steel bars |
06Cr17Ni12Mo2 / 022Cr17Ni12Mo2 |
|
DIN 593 |
German standard for flat steel bars |
1.4401 / 1.4404 |
|
NACE MR0175 / ISO 15156 |
Sour service compliance |
316 / 316L (with HRC ≤22) |
|
Element |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
Mo |
|
316 Flat Bars |
≤0.08 |
≤2.00 |
≤0.045 |
≤0.030 |
≤1.00 |
16.0–18.0 |
10.0–14.0 |
2.0–3.0 |
|
316L Flat Bars |
≤0.03 |
≤2.00 |
≤0.045 |
≤0.030 |
≤1.00 |
16.0–18.0 |
10.0–14.0 |
2.0–3.0 |
Both 316 and 316L stainless steel flat bars exhibit excellent corrosion resistance and mechanical properties. The lower carbon content in 316L minimizes carbide precipitation during welding, providing enhanced resistance to intergranular corrosion compared to standard 316, especially in welded fabrications.
|
Property |
Unit |
316 (Annealed) |
316L (Annealed) |
|
Tensile Strength |
MPa |
≥515 |
≥485 |
|
Yield Strength (0.2% offset) |
MPa |
≥205 |
≥170 |
|
Elongation |
% |
≥40 |
≥40 |
|
Hardness (Brinell) |
HBW |
≤217 |
≤197 |
|
Density |
g/cm³ |
7.93 |
7.93 |
|
Melting Range |
°C |
1375–1400 |
1375–1400 |
|
Modulus of Elasticity |
GPa |
193 |
193 |
|
Coefficient of Thermal Expansion (20–100°C) |
μm/m·K |
15.9 |
15.9 |
Heat Treatment Condition:
Both 316 and 316L stainless steel flat bars are normally supplied in the annealed
condition. Solution annealing at 1040–1080°C followed by rapid cooling (water
quenching) restores full corrosion resistance and ensures optimal ductility.
Delivery Condition Options:
Black (Hot-Rolled): As-rolled with mill scale – for general structural applications
Pickled: Acid-treated, oxide-free surface – for welding and fabrication
Polished: Mechanically polished, smooth finish – for architectural and decorative applications
Standard Thickness Ranges:
|
Thickness (mm) |
Width Range (mm) |
Tolerance (mm) |
|
3 – 6 |
12 – 100 |
±0.2 |
|
6 – 10 |
20 – 150 |
±0.3 |
|
10 – 20 |
30 – 200 |
±0.4 |
|
20 – 30 |
40 – 250 |
±0.5 |
|
30 – 50 |
50 – 300 |
±0.7 |
Standard Width Ranges:
|
Width (mm) |
Tolerance (mm) |
|
12 – 50 |
±0.5 |
|
50 – 100 |
±0.8 |
|
100 – 200 |
±1.0 |
|
200 – 300 |
±1.5 |
Standard Lengths:
l 3000mm (3 meters)
l 6000mm (6 meters)
l Custom lengths available upon request
Straightness Tolerances:
l Standard: 2mm per meter
l Precision: 1mm per meter (upon request)
|
Dimensions (mm) |
Weight (kg/m) |
Dimensions (mm) |
Weight (kg/m) |
|
20 x 3 |
0.48 |
60 x 10 |
4.76 |
|
20 x 4 |
0.64 |
60 x 12 |
5.71 |
|
25 x 3 |
0.60 |
65 x 8 |
4.12 |
|
25 x 4 |
0.79 |
65 x 10 |
5.16 |
|
25 x 5 |
0.99 |
70 x 6 |
3.33 |
|
30 x 3 |
0.71 |
70 x 8 |
4.44 |
|
30 x 4 |
0.95 |
70 x 10 |
5.56 |
|
30 x 5 |
1.19 |
75 x 8 |
4.76 |
|
30 x 6 |
1.43 |
75 x 10 |
5.95 |
|
40 x 4 |
1.27 |
80 x 8 |
5.08 |
|
40 x 5 |
1.59 |
80 x 10 |
6.35 |
|
40 x 6 |
1.90 |
80 x 12 |
7.62 |
|
40 x 8 |
2.54 |
100 x 8 |
6.35 |
|
50 x 5 |
1.98 |
100 x 10 |
7.93 |
|
50 x 6 |
2.38 |
100 x 12 |
9.52 |
|
50 x 8 |
3.17 |
100 x 15 |
11.90 |
|
50 x 10 |
3.97 |
120 x 10 |
9.52 |
|
60 x 5 |
2.38 |
120 x 12 |
11.43 |
|
60 x 6 |
2.86 |
120 x 15 |
14.29 |
|
60 x 8 |
3.81 |
150 x 12 |
14.29 |
*Formula: Weight (kg/m) = Width (mm) × Thickness (mm) × 0.00793*
|
Surface Finish |
Code |
Description |
Typical Applications |
|
Black (Hot-Rolled) |
HR |
As-rolled with mill scale, dark surface |
General structural, embedded applications |
|
Pickled |
P |
Acid-treated, oxide-free, matte silver finish |
Welded fabrications, chemical plant supports |
|
Polished |
PL |
Mechanically polished, smooth, reflective finish |
Architectural trim, handrails, food equipment |
|
Brushed (Hairline) |
HL |
Linear brushed finish, satin appearance |
Decorative architectural, furniture |
|
Mirror Polished |
MP |
Highly reflective, mirror-like finish |
Sanitary equipment, decorative trim |
Raw Material Selection: High-quality 316/316L stainless steel billets from certified mills with certified chemical composition and traceability.
Heating: Billets heated to 1150–1250°C in reheating furnaces.
Hot Rolling: Heated billets passed through roughing and finishing stands to form flat bar shape with precise width and thickness.
Cooling: Controlled cooling to prevent surface defects and ensure uniform microstructure.
Annealing: Solution annealing at 1040–1080°C to restore corrosion resistance and ductility.
Pickling: Removal of oxide scale using mixed acid (HNO₃ + HF) for pickled finish.
Straightening: Roller straightening to ensure straightness tolerance within 2mm per meter.
Cutting: Cut to standard lengths (3000mm or 6000mm) using cold saws.
Surface Finishing (Optional): Polishing or brushing applied upon request.
Inspection & Testing: Dimensional check, PMI, mechanical testing, surface inspection.
Marking & Packing: Each bundle tagged with grade, heat number, dimensions, and standard.
Chemical Analysis: Spectrometer verification or PMI for alloy elements (Cr, Ni, Mo).
Mechanical Testing: Tensile strength, yield strength, elongation, hardness per ASTM A370.
Dimensional Inspection: Thickness, width, length, straightness, squareness using calibrated instruments.
Surface Inspection: Visual check for surface defects, cracks, seams, and laps.
Edge Inspection: Check for square edges, burrs, and cracks.
Ultrasonic Testing (UT): Per ASTM A388 for internal flaw detection (upon request).
Intergranular Corrosion Test: ASTM A262 Practice E for 316L (upon request).
Third-Party Inspection: SGS, BV, DNV, TUV, LR, ABS available upon customer request.
Structural Supports: Equipment framework supports, pipe rack supports, platform grating supports, ladder rungs, walkway supports.
Marine Hardware: Boat trailer components, dock hardware, shipbuilding stiffeners, marine railings, seawater system supports (ABS/BV/DNV/LR certified).
Chemical Plant Frameworks: Equipment supports, pipe support brackets, tank stiffeners, agitator supports, platform structures.
Food Processing Equipment: Conveyor frame supports, equipment legs, guide rails, bracket arms, table frames, workbench supports.
Architectural Trim: Handrail brackets, balustrade supports, curtain wall frames, door frames, window trim, decorative grilles.
Machinery Components: Machine frames, guide rails, support brackets, mounting plates, fixture components, jig and fixture bases.
Pharmaceutical Equipment: Cleanroom framework supports, equipment stands, instrument mounting brackets, pipe supports.
Heat Exchanger Supports: Baffle support bars, channel bar supports, tube sheet stiffeners.
Valve Actuator Brackets: Actuator mounting brackets, support plates, linkage arms.
Custom Fabrications: Brackets, gussets, stiffeners, reinforcement plates, base plates.
1. What is the difference between
316 and 316L stainless steel flat bars?
The main difference is carbon content. 316L has lower carbon (≤0.03% vs
≤0.08%), which prevents carbide precipitation during welding and provides
better resistance to intergranular corrosion. For welded fabrications, 316L is
typically preferred.
2. What are the standard lengths for
stainless steel flat bars?
Standard lengths are 3000mm (3 meters) and 6000mm (6 meters). Custom lengths up
to 12000mm are available upon request.
3. What is the difference between
black and pickled flat bars?
Black (hot-rolled) flat bars have mill scale on the surface and are suitable
for general structural applications where surface appearance is not critical.
Pickled flat bars have the mill scale removed by acid treatment, providing a
clean, oxide-free surface ideal for welding and fabrication.
4. Can 316 flat bars be used in
marine environments?
Yes, 316/316L flat bars offer excellent resistance to seawater corrosion and
are widely used in marine hardware, shipbuilding, and offshore applications.
ABS/DNV/LR certifications available.
5. What are square edges?
Square edges refer to the cross-section corners of the flat bar being sharp
90-degree angles. Precision-rolled square edges ensure accurate fitting,
welding, and assembly in structural applications.
6. Do you provide material test
reports (MTR) and certification?
Yes, every shipment includes EN 10204 Type 3.1 MTR with chemical analysis and
mechanical properties. Third-party inspection available upon request.
Complete Size Range: Thickness from 3mm to 50mm, width from 12mm to 300mm – all standard sizes in stock
Multiple Surface Finishes: Black, pickled, polished, brushed, mirror – all available
Precision Tolerances: EN 10058, DIN 593, ASTM A484 compliant
Square Edges: Precision-rolled for accurate fabrication
Full Traceability: Heat number on each bundle – traceable to original mill certificate
Marine Certified: ABS, BV, DNV, LR certifications available
Large Inventory: Over 2,000 tons in stock – ready for immediate dispatch
Custom Cutting: Cut to exact lengths per order
Global Delivery: Exported to over 50 countries
Website: www.womicstainless.com
E-mail: info@womicstainless.com
Tel / WhatsApp / WeChat:
Victor: +86 15575100681
Jack: +86 18390957568
Womic Steel – Your reliable partner for high‑quality stainless steel products, precision machined components, and custom solutions for corrosion‑resistant applications.
Stock Examples (316L Stainless Steel Flat Bars – Pickled Finish – Structural Grade):
|
Dimensions (mm) |
Length |
Weight (kg/m) |
Typical Application |
|
30 x 5 |
6000mm |
1.19 |
Light equipment brackets |
|
40 x 6 |
6000mm |
1.90 |
Support brackets |
|
50 x 6 |
6000mm |
2.38 |
Framework supports |
|
60 x 8 |
6000mm |
3.81 |
Pipe rack supports |
|
75 x 10 |
6000mm |
5.95 |
Heavy equipment frames |
|
100 x 10 |
6000mm |
7.93 |
Structural supports |
|
120 x 12 |
6000mm |
11.43 |
Platform supports |
Stock Examples (316L Stainless Steel Flat Bars – Polished Finish – Architectural Grade):
|
Dimensions (mm) |
Length |
Weight (kg/m) |
Typical Application |
|
20 x 3 |
3000mm |
0.48 |
Handrail brackets |
|
25 x 4 |
3000mm |
0.79 |
Balustrade supports |
|
30 x 4 |
3000mm |
0.95 |
Architectural trim |
|
40 x 5 |
3000mm |
1.59 |
Door frames |
|
50 x 6 |
3000mm |
2.38 |
Curtain wall frames |
Stock Examples (316 Stainless Steel Flat Bars – Black – General Industrial):
|
Length |
Weight (kg/m) |
Typical Application |
|
|
40 x 5 |
6000mm |
1.59 |
Machine bases |
|
50 x 6 |
6000mm |
2.38 |
Conveyor frames |
|
60 x 10 |
6000mm |
4.76 |
Heavy machinery supports |
|
80 x 12 |
6000mm |
7.62 |
Structural frameworks |
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