U.C. Metal supplies austenitic and ferritic stainless steel precision coils and cut sheets for precision springs, automotive stampings, electronic connectors, and corrosive industrial environments. Sourced from premier primary mills, our stainless inventory provides tight mechanical property control and reliable work-hardening response.
Primary Stainless Grades
SUS301-CSP (High-Hardness Spring Strip), SUS304-CSP / 304 (General Purpose), SUS430 (Ferritic)
Available Tempers
Annealed, 1/4H, 1/2H, 3/4H, H, EH, SEH (Super Extra Hard) across precision cold-worked strip
Supply Formats
Precision slit strip coils and cut sheets tailored to customer stamping and forming tooling
Chemical Composition
Chemical composition limits according to verified company technical specifications (values in weight %):
| Element | 301 | 304 | 430 |
|---|---|---|---|
| Carbon (C) | < 0.15 % | < 0.08 % | < 0.12 % |
| Nickel (Ni) | 6.0 ~ 8.0 % | 8.0 ~ 10.5 % | — |
| Chromium (Cr) | 16.0 ~ 18.0 % | 18.0 ~ 20.0 % | 16.0 ~ 18.0 % |
* Silicon (Si) ≤ 1.00%, Manganese (Mn) ≤ 2.00%, Phosphorus (P) ≤ 0.045%, Sulfur (S) ≤ 0.030% as standard limits.
Mechanical Properties & Hardness (Temper) Guide
Vickers hardness ranges across standard cold-reduction temper conditions:
| Temper Designation | 301 | 304 |
|---|---|---|
| 1/4H | 250 ~ 290 | 210 ~ 250 |
| 1/2H | 310 ~ 350 | 250 ~ 290 |
| 3/4H | 370 ~ 410 | 310 ~ 350 |
| H (Hard) | 430 ~ 470 | 370 ~ 410 |
| EH (Extra Hard) | 490 ~ 530 | — |
| SEH (Super Extra Hard) | 530 ~ 570 | — |
* Values represent Vickers Hardness (HV) from verified technical records. Note: Grade 430 was not included in legacy spring temper tables (ferritic stainless steel is predominantly supplied in annealed condition). Annealed hardness reference or certified mill values are available upon enquiry.
International Standards Reference
JIS is the primary reference. The designations listed below provide approximate international grade mappings for enquiry, not a guarantee of substitution. Before ordering, confirm the applicable standard edition, product form, composition, temper, and delivery requirements.
| JIS (primary) | China GB | EN | ISO name | US (AISI / UNS) |
|---|---|---|---|---|
| SUS301-CSP | 12Cr17Ni7 (S30110) | 1.4310 | X10CrNi18-8 | 301 / S30100 |
| SUS304-CSP / SUS304 | 06Cr19Ni10 (S30408) | 1.4301 | X5CrNi18-10 | 304 / S30400 |
| SUS430 | 10Cr17 (S11710) | 1.4016 | X6Cr17 | 430 / S43000 |
Note: Grade cross-references are approximate and provided for reference only. Chemical composition, mechanical properties, temper, and applicable product standards should be verified before material substitution.
Dimensions & Supply Formats
- Coil & Strip Supply: Thickness: 0.1 mm – 3.0 mm. (Note on width: Legacy company records list Material Range width as 2 mm – 610 mm and Dimension width as 4 mm – 1220 mm. Actual slitting and supply width capabilities depend on thickness, temper grade, and edge requirements; please confirm with our sales engineers.)
- Coil Inner Diameter (ID): 200 mm, 300 mm, 400 mm, 500 mm.
- Sheet / Plate: Thickness: 0.2 mm – 3.0 mm · Width: up to 1220 mm · Length: up to 3500 mm.
- Custom Processing: In-house coil slitting and cut-to-length shearing available in Sam Phran, Nakhon Pathom.
Enquire About Stainless Steel Coil & Strip
Contact our technical sales team for strip slitting width capabilities, custom temper availability (1/4H through SEH), or material test reports.
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