Cold Drawn Stainless Steel Bar
JCNMetal — Bright Finish, Exact Dimensions • ISO 9001 Quality System • Verified by SGS / BV
Precision You Can Measure, Quality You Can See
We produce cold drawn stainless steel bars with high dimensional accuracy, smooth bright surfaces, and consistent strength you can rely on.
Every bar is drawn through precision dies and stress-relieved for stability, ensuring straightness, tight tolerance, and performance that meets demanding machining requirements.
Why Choose Cold Drawn Stainless Steel Bars
Cold drawing enhances both the strength and precision of stainless steel, giving the bars a smoother surface and tighter dimensional control.
Compared with hot rolled bars, they provide 20–30% higher yield strength, ±0.05–0.15 mm tolerance, and a refined surface finish of Ra 0.8–1.6 μm, making them ideal for precision-machined components that demand accuracy and reliability.
- Used For:
- Shafts and fasteners
- CNC-machined components
- Pumps, valves, and fittings
Available Shapes
Round Bar
Cold drawn for high dimensional precision and smooth bright finish with consistent straightness along the full length.
Flat Bar
Cold drawn to ensure uniform thickness, smooth surface, and slightly rounded edges for stable shaping and safety.
Square Bar
Precisely drawn with equal sides, clean edges, and tight tolerance that maintain accurate geometry and consistent size.
Hexagon Bar
Cold drawn through calibrated hex dies for uniform across-flat accuracy and bright surface finish with sharp definition.
Stainless Steel Bar Materials Overview
| Grade (AISI) | JIS Equivalent | EN/DIN | GB |
|---|---|---|---|
| 301 | SUS301 | 1.4319 | 12Cr17Ni7 |
| 302 | SUS302 | 1.4318 | 12Cr18Ni9 |
| 304 | SUS304 | 1.4301 | 06Cr19Ni10 |
| 304L | SUS304L | 1.4306 | 00Cr19Ni10 |
| 304H | SUS304H | 1.4948 | 07Cr19Ni10 |
| 304N | SUS304N1 | 1.4315 | – |
| 309S | SUS309S | 1.4833 | 06Cr23Ni13 |
| 310S | SUS310S | 1.4845 | 06Cr25Ni20 |
| 310H | SUS310H | 1.4845 | – |
| 316 | SUS316 | 1.4401 | 06Cr17Ni12Mo2 |
| 316L | SUS316L | 1.4404 | 00Cr17Ni14Mo2 |
| 316H | SUS316H | 1.4436 | – |
| 316Ti | SUS316Ti | 1.4571 | 06Cr17Ni12Mo2Ti |
| 316LN | SUS316LN1 | 1.4429 | – |
| 317L | SUS317L | 1.4438 | 00Cr19Ni13Mo3 |
| 321 | SUS321 | 1.4541 | 06Cr18Ni11Ti |
| 321H | SUS321H | 1.4541 | – |
| 347 | SUS347 | 1.4550 | 06Cr18Ni11Nb |
| 347H | SUS347H | 1.4912 | – |
| 904L | SUS904L | 1.4539 | 00Cr20Ni25Mo4.5Cu |
| 253MA | SUS253MA | 1.4835 | – |
| 254SMo | SUS254SMo | 1.4547 | 00Cr20Ni18Mo6CuN |
| 17-4PH | SUS630 | 1.4542 | 0Cr17Ni4Cu4Nb |
| 17-7PH | SUS631 | 1.4568 | 0Cr17Ni7Al |
| PH15-7Mo | SUS631 | 1.4542 | 0Cr15Ni7Mo2Al |
| Grade (AISI) | JIS Equivalent | EN/DIN | GB |
|---|---|---|---|
| 405 | SUS405 | 1.4002 | 12Cr13Al |
| 409 / 409L | SUH409 / SUH409L | 1.4512 | 06Cr11Ti / 06Cr12Ti |
| 430 | SUS430 | 1.4016 | 10Cr17 |
| 434 | SUS434 | 1.4113 | 10Cr17Mo |
| 436 | SUS436 | 1.4536 | 11Cr17Ti |
| 439 | SUS439 | 1.4510 | 11Cr19Ti |
| 441 | SUS441 | 1.4509 | 18CrTiNb |
| 444 | SUS444 | 1.4521 | 00Cr18Mo2 |
| 446 | SUS446 | 1.4762 | 25Cr23Al |
| Grade (AISI) | JIS Equivalent | EN/DIN | GB |
|---|---|---|---|
| 410 | SUS410 | 1.4006 | 12Cr13 |
| 410S | SUS410S | 1.4000 | 06Cr13 |
| 420 | SUS420J1 / J2 | 1.4021 / 1.4028 | 12Cr13 / 13Cr13 |
| 420F | SUS420F | 1.4029 | – |
| 431 | SUS431 | 1.4057 | 16Cr2Ni2Mo |
| 440A | SUS440A | 1.4109 | 7Cr17 |
| 440B | SUS440B | 1.4112 | 8Cr17 |
| 440C | SUS440C | 1.4125 | 9Cr18 |
| 416 | SUS416 | 1.4005 | 12Cr12S |
| 420F | SUS420F | 1.4029 | – |
| Grade (AISI / UNS) | JIS Equivalent | EN/DIN | GB |
|---|---|---|---|
| S31803 | SUS329J3L | 1.4462 | 022Cr22Ni5Mo3N |
| S32205 | SUS329J3L | 1.4462 | 022Cr22Ni5Mo3N |
| S32304 | – | 1.4362 | – |
| S32550 | SUS329J4L | 1.4507 | 00Cr25Ni6Mo3CuN |
| S32750 | F53 | 1.4410 | 2507 |
| S32760 | F55 | 1.4501 | 2507MoWCuN |
| S32900 | SUS329J1 | 1.4477 | 00Cr23Ni5Mo |
| S32950 | F52 | – | 00Cr26Ni6MoN |
| 2205 | SUS329J3L | 1.4462 | 00Cr22Ni5Mo3N |
| 2507 | NAS74N | 1.4410 | 00Cr25Ni7Mo4N |
| 926 | SUS926 | 1.4529 | 00Cr25Ni7Mo4CuN |
| 654SMo | SUS654SMo | 1.4652 | 00Cr26Ni8Mo3CuN |
We Help You Avoid Common Problems
Our goal is simple —
You Receive Cold Drawn Stainless Steel Bars That Perform Exactly As You Expect.
| Common Issue | How We Solve It |
|---|---|
| Micro-cracks or flaking after drawing | We use multi-pass drawing with intermediate annealing to relieve strain and prevent microstructural tearing |
| Surface scratches caused by die wear or impurities | All dies are mirror-polished and replaced regularly; lubrication is optimized to ensure a uniform, bright surface |
| Residual stress causing bending during machining | Stress-relief annealing and straightening are applied after final drawing for dimensional stability |
| Diameter inconsistency along bar length | Tolerance is controlled within ±0.05 – 0.1mm through precision die calibration and inline measurement |
| Work-hardening leading to difficult machining | Process parameters are adjusted per grade to balance hardness and machinability — especially for 304, 316, and 431 grades |
| Corrosion at the surface due to trapped drawing lubricant | Post-drawing cleaning and passivation remove residues, restoring full stainless protection |
| Batch-to-batch variation in mechanical properties | Every heat lot undergoes tensile, yield, and hardness tests to ensure mechanical consistency |
| Poor surface brightness after storage or export | Bright drawn or centerless-ground bars are protected with anti-rust oil and vacuum-sealed wrapping for long-term clarity |
Where Our Cold Drawn Bars Are Used
Precision Machining
Used for precision shafts, spindles, and pins where tight tolerances and straightness are essential.
Tooling & Fixtures
Ideal for jigs, molds, and machining fixtures requiring dimensional stability and clean edges.
Fastener & Fitting
Applied in high-precision bolts, nuts, and threaded connectors demanding bright surface finish.
Automotive Components
For steering shafts, drive pins, and engine parts where consistency and fatigue resistance are critical.
Automation & Robotics
Used for linear shafts, guide rods, and motion control systems requiring perfect roundness and finish.
Hydraulic Components
For piston rods, valve stems, and cylinder components ensuring smooth movement and sealing performance.
Food & Medical Equipment
Applied in clean, corrosion-resistant components that require both hygiene and surface perfection.
Instrumentation & Electronics
Used for precision hardware, connectors, and miniature shafts in measuring and control devices.
Standard Sizes and Grades
| Type | Size Range | Surface | Common Grades |
|---|---|---|---|
| Round Bar | 2 – 100 mm | Bright Drawn / Peeled / Centerless Ground | 303, 304, 304L, 316, 316L, 321, 431, 2205 |
| Flat Bar | Thickness 2 – 100 mm × Width 5 – 300 mm | Bright / Polished | 304, 304L, 316L, 430 |
| Square Bar | 4 – 80 mm | Bright / Polished | 304, 304L, 316, 410 |
| Hexagon Bar | 3 – 70 mm (across flats) | Bright / Polished | 303, 304, 316, 416 |
Tensile Strength: 550 – 850 MPa | Elongation: ≥35% | Hardness: ≤240 HB
Straightness: ≤0.2 mm/m
Standards: ASTM A276 / A484 / EN 10278 / JIS G4318
Tolerance for Cold Drawn Round Bars
| Size (mm) | H8 | H9 | H10 | H11 | H12 | H13 |
|---|---|---|---|---|---|---|
| 3 | 0 ~ -0.014 | 0 ~ -0.025 | 0 ~ -0.040 | 0 ~ -0.060 | 0 ~ -0.100 | 0 ~ -0.140 |
| >3 ~ ≤6 | 0 ~ -0.018 | 0 ~ -0.030 | 0 ~ -0.048 | 0 ~ -0.075 | 0 ~ -0.120 | 0 ~ -0.180 |
| >6 ~ ≤10 | 0 ~ -0.022 | 0 ~ -0.036 | 0 ~ -0.058 | 0 ~ -0.090 | 0 ~ -0.150 | 0 ~ -0.220 |
| >10 ~ ≤18 | 0 ~ -0.027 | 0 ~ -0.043 | 0 ~ -0.070 | 0 ~ -0.110 | 0 ~ -0.180 | 0 ~ -0.270 |
| >18 ~ ≤30 | 0 ~ -0.033 | 0 ~ -0.052 | 0 ~ -0.084 | 0 ~ -0.130 | 0 ~ -0.210 | 0 ~ -0.330 |
| >30 ~ ≤50 | 0 ~ -0.039 | 0 ~ -0.062 | 0 ~ -0.100 | 0 ~ -0.160 | 0 ~ -0.250 | 0 ~ -0.390 |
| >50 ~ ≤80 | 0 ~ -0.046 | 0 ~ -0.074 | 0 ~ -0.120 | 0 ~ -0.190 | 0 ~ -0.300 | 0 ~ -0.460 |
Tolerance for Cold Drawn Flat Bars
| Size (mm) | H8 | H9 | H10 | H11 | H12 | H13 |
|---|---|---|---|---|---|---|
| 3 | 0 ~ -0.014 | 0 ~ -0.025 | 0 ~ -0.040 | 0 ~ -0.060 | 0 ~ -0.100 | 0 ~ -0.140 |
| >3 ~ ≤6 | 0 ~ -0.018 | 0 ~ -0.030 | 0 ~ -0.048 | 0 ~ -0.075 | 0 ~ -0.120 | 0 ~ -0.180 |
| >6 ~ ≤10 | 0 ~ -0.022 | 0 ~ -0.036 | 0 ~ -0.058 | 0 ~ -0.090 | 0 ~ -0.150 | 0 ~ -0.220 |
| >10 ~ ≤18 | 0 ~ -0.027 | 0 ~ -0.043 | 0 ~ -0.070 | 0 ~ -0.110 | 0 ~ -0.180 | 0 ~ -0.270 |
| >18 ~ ≤30 | 0 ~ -0.033 | 0 ~ -0.052 | 0 ~ -0.084 | 0 ~ -0.130 | 0 ~ -0.210 | 0 ~ -0.330 |
| >30 ~ ≤50 | 0 ~ -0.039 | 0 ~ -0.062 | 0 ~ -0.100 | 0 ~ -0.160 | 0 ~ -0.250 | 0 ~ -0.390 |
| >50 ~ ≤80 | 0 ~ -0.046 | 0 ~ -0.074 | 0 ~ -0.120 | 0 ~ -0.190 | 0 ~ -0.300 | 0 ~ -0.460 |
Tolerance for Cold Drawn Square Bars
| Size (mm) | H8 | H9 | H10 | H11 | H12 | H13 |
|---|---|---|---|---|---|---|
| 3 | 0 ~ -0.014 | 0 ~ -0.025 | 0 ~ -0.040 | 0 ~ -0.060 | 0 ~ -0.100 | 0 ~ -0.140 |
| >3 ~ ≤6 | 0 ~ -0.018 | 0 ~ -0.030 | 0 ~ -0.048 | 0 ~ -0.075 | 0 ~ -0.120 | 0 ~ -0.180 |
| >6 ~ ≤10 | 0 ~ -0.022 | 0 ~ -0.036 | 0 ~ -0.058 | 0 ~ -0.090 | 0 ~ -0.150 | 0 ~ -0.220 |
| >10 ~ ≤18 | 0 ~ -0.027 | 0 ~ -0.043 | 0 ~ -0.070 | 0 ~ -0.110 | 0 ~ -0.180 | 0 ~ -0.270 |
| >18 ~ ≤30 | 0 ~ -0.033 | 0 ~ -0.052 | 0 ~ -0.084 | 0 ~ -0.130 | 0 ~ -0.210 | 0 ~ -0.330 |
| >30 ~ ≤50 | 0 ~ -0.039 | 0 ~ -0.062 | 0 ~ -0.100 | 0 ~ -0.160 | 0 ~ -0.250 | 0 ~ -0.390 |
| >50 ~ ≤80 | 0 ~ -0.046 | 0 ~ -0.074 | 0 ~ -0.120 | 0 ~ -0.190 | 0 ~ -0.300 | 0 ~ -0.460 |
Tolerance for Cold Drawn Hexagon Bars
| Size (mm) | H8 | H9 | H10 | H11 | H12 | H13 |
|---|---|---|---|---|---|---|
| 3 | 0 ~ -0.014 | 0 ~ -0.025 | 0 ~ -0.040 | 0 ~ -0.060 | 0 ~ -0.100 | 0 ~ -0.140 |
| >3 ~ ≤6 | 0 ~ -0.018 | 0 ~ -0.030 | 0 ~ -0.048 | 0 ~ -0.075 | 0 ~ -0.120 | 0 ~ -0.180 |
| >6 ~ ≤10 | 0 ~ -0.022 | 0 ~ -0.036 | 0 ~ -0.058 | 0 ~ -0.090 | 0 ~ -0.150 | 0 ~ -0.220 |
| >10 ~ ≤18 | 0 ~ -0.027 | 0 ~ -0.043 | 0 ~ -0.070 | 0 ~ -0.110 | 0 ~ -0.180 | 0 ~ -0.270 |
| >18 ~ ≤30 | 0 ~ -0.033 | 0 ~ -0.052 | 0 ~ -0.084 | 0 ~ -0.130 | 0 ~ -0.210 | 0 ~ -0.330 |
| >30 ~ ≤50 | 0 ~ -0.039 | 0 ~ -0.062 | 0 ~ -0.100 | 0 ~ -0.160 | 0 ~ -0.250 | 0 ~ -0.390 |
| >50 ~ ≤80 | 0 ~ -0.046 | 0 ~ -0.074 | 0 ~ -0.120 | 0 ~ -0.190 | 0 ~ -0.300 | 0 ~ -0.460 |
Quality Control You Can Trust
- Each batch inspected for dimensional accuracy, tensile strength, and surface finish
- Straightness and roundness checked after every drawing and polishing step
- Every shipment comes with a material test report and heat-number traceability
- Third-party inspection (SGS, BV, etc.) welcomed upon request.
- If any quality deviation is found before delivery, we replace the batch immediately — no rework, no delay
Surface Options
- Bright Drawn: smooth metallic finish obtained from precision cold drawing, suitable for direct machining.
- Peeled / Turned: oxide and surface imperfections are removed for a clean, uniform appearance and improved dimensional accuracy.
- Polished / Ground: mirror-like surface with excellent roundness and straightness, ideal for high-precision applications.
We provide surface finishes that meet your precision, appearance, and tolerance needs — engineered for lasting consistency.
Packaging and Delivery
- Bundled with soft straps and protected by plastic or waterproof film to prevent surface scratches.
- Anti-rust oil coating applied for bright or polished surfaces before packing.
- Export packing available with wooden cases, pallets, or steel frames for long-distance shipment.
- Each bundle clearly labeled with grade, size, heat number, and surface type for full traceability.
- Standard delivery within 7–10 days after order confirmation.
Why JCN Metal
- Factory in China with in-house cold drawing, peeling, and polishing lines
- ISO 9001 certified production and full mechanical testing for each heat lot
- Precision control on tolerance, straightness, and surface finish for every bar
- Custom sizes and grades available for quick, flexible delivery
- 100% visual and dimensional inspection before shipment
Let’s work together
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