Ferritic & low-carbon chromium grades / MATERIAL REFERENCE
A ferritic grade sold under multiple Ti/Nb-stabilized specifications. The commercial name alone does not define the UNS or GB designation.
Compare the exact designation, chemical limits and test conditions before specifying material. Related grades are not automatically interchangeable or certified to all four standards.
EN 10028-7
Stainless steel flat products for pressure purposes. Grade, product form, thickness and delivery treatment must match the standard. It is not a bar/profile standard.
Reference: 2016 (DIN EN10028-7:2016-10 current, checked2026-09-09)ASTM A240/A240M
Plate, sheet and strip for pressure vessels and general applications. Flat-product reference data; not bar/profile specifications or guaranteed Sheye stock capability.
Reference: A240/A240M-20a reference tables (current catalogue: A240/A240M-26)Related-grade / reference qualifications applyJIS G 4305
Cold-rolled stainless steel plate, sheet and strip. These flat-product data do not establish a hot-rolled plate, bar or profile specification.
Reference: JIS G 4305:2021 grade references; steelmaker summaries and explicitly labelled 2012 mechanical rowsSpecification confirmation requiredNo exact SUS441 designation or complete G4305 counterpart was established in the primary JIS grade sources. Do not relabel another Ti/Nb-stabilized ferritic grade as an identical JIS grade.
GB/T 3280
Cold-rolled stainless steel sheet, plate and strip, including slit wide strip. These values are not hot-rolled plate, bar or profile acceptance limits.
Reference: 2015Related-grade / reference qualifications applyMass %. ≤ means maximum; ≥ means minimum. A range includes both limits. “—” means no value published in this comparison; it never means zero.
Scroll the table horizontally to compare all standards.
| Element | EN 10028-72016 (DIN EN10028-7:2016-10 current, checked2026-09-09) | ASTM A240/A240MA240/A240M-20a reference tables (current catalogue: A240/A240M-26) | JIS G 4305JIS G 4305:2021 grade references; steelmaker summaries and explicitly labelled 2012 mechanical rows | GB/T 32802015 |
|---|---|---|---|---|
| Designation | 1.4509 / X2CrTiNb18 | UNS S44100 UNS S43940 (commercial441/1.4509 reference) UNS S43932 (commercial441 reference) | No confirmed JIS G4305 counterpart | 022Cr18NbTi / S11973 |
| C | ≤0.030 | UNS S44100≤0.030 UNS S43940 (commercial441/1.4509 reference)≤0.030 UNS S43932 (commercial441 reference)≤0.030 | — | ≤0.030 |
| Si | ≤1.00 | UNS S44100≤1.00 UNS S43940 (commercial441/1.4509 reference)≤1.00 UNS S43932 (commercial441 reference)≤1.00 | — | ≤1.00 |
| Mn | ≤1.00 | UNS S44100≤1.00 UNS S43940 (commercial441/1.4509 reference)≤1.00 UNS S43932 (commercial441 reference)≤1.00 | — | ≤1.00 |
| P | ≤0.040 | UNS S44100≤0.040 UNS S43940 (commercial441/1.4509 reference)≤0.040 UNS S43932 (commercial441 reference)≤0.040 | — | ≤0.040 |
| S | ≤0.015 | UNS S44100≤0.030 UNS S43940 (commercial441/1.4509 reference)≤0.015 UNS S43932 (commercial441 reference)≤0.030 | — | ≤0.030 |
| Cr | 17.5–18.5 | UNS S4410017.5–19.5 UNS S43940 (commercial441/1.4509 reference)17.5–18.5 UNS S43932 (commercial441 reference)17.0–19.0 | — | 17.00–19.00 |
| Ni | — | UNS S44100≤1.00 UNS S43940 (commercial441/1.4509 reference)— UNS S43932 (commercial441 reference)≤0.50 | — | ≤0.50 |
| N | — | UNS S44100≤0.030 UNS S43940 (commercial441/1.4509 reference)— UNS S43932 (commercial441 reference)≤0.030 | — | ≤0.030 |
| Ti | 0.10–0.60 | UNS S441000.10–0.50 UNS S43940 (commercial441/1.4509 reference)0.10–0.60 UNS S43932 (commercial441 reference)— | — | — |
| Nb | (3×C+0.30) to1.00 | UNS S44100≥0.30+9×C; ≤0.90 UNS S43940 (commercial441/1.4509 reference)≥0.30+3×C UNS S43932 (commercial441 reference)— | — | — |
| Ti + Nb | — | UNS S44100— UNS S43940 (commercial441/1.4509 reference)— UNS S43932 (commercial441 reference)— | — | Ti+Nb: [0.20+4×(C+N)]–0.75 |
| Al | — | UNS S44100— UNS S43940 (commercial441/1.4509 reference)— UNS S43932 (commercial441 reference)≤0.15 | — | ≤0.15 |
| Ti+Nb | — | UNS S44100— UNS S43940 (commercial441/1.4509 reference)— UNS S43932 (commercial441 reference)≥0.20+4×(C+N); ≤0.75 | — | — |
Rp0.2 is 0.2% proof strength; Rm is tensile strength; A is elongation. The delivery condition, product form, thickness and specimen basis belong to the value. Rows identify the reference specification or manufacturer summary and its qualifications; values are not design allowables.
| Standard / designation | Condition & thickness | Rp0.2 | Rm | Elongation | Hardness |
|---|---|---|---|---|---|
| EN 10028-71.4509 / X2CrTiNb18 | Annealed; C (cold-rolled strip)3 ≤t ≤4 mm (selected verified proportional-gauge category) | Rp0.2 ≥230 longitudinal / ≥250 transverse MPa | 430–630 MPa | A ≥18% (L0=5.65√S0) | Not specified in this comparison |
| Table7 sets a4 mm maximum for this grade/product form. This selected row does not assert data for thinner strip or hot-rolled plate. | |||||
| ASTM A240/A240MUNS S44100 | Annealed / heat-treated flat-product reference; confirm A480/A480M delivery requirementsNo grade-specific thickness split in the cited Table 2 row | ≥241 MPa (0.2% proof) | ≥414 MPa | ≥20% (50 mm gauge length) | ≤190 HBW or ≤90 HRBW |
| ASTM A240/A240MUNS S43940 (commercial441/1.4509 reference) | Annealed / heat-treated flat-product reference; confirm A480/A480M delivery requirementsNo grade-specific thickness split in the cited Table 2 row | ≥250 MPa (0.2% proof) | ≥430 MPa | ≥18% (50 mm gauge length) | ≤180 HBW or ≤88 HRBW |
| ASTM A240/A240MUNS S43932 (commercial441 reference) | Annealed / heat-treated flat-product reference; confirm A480/A480M delivery requirementsNo grade-specific thickness split in the cited Table 2 row | ≥205 MPa (0.2% proof) | ≥415 MPa | ≥22% (50 mm gauge length) | ≤183 HBW or ≤89 HRBW |
| JIS G 4305No confirmed JIS G4305 counterpart | No confirmed mechanical limits for this reference. Review the exact order specification. | — | — | — | — |
| GB/T 3280022Cr18NbTi / S11973 | AnnealedCold-rolled flat products; see test-thickness notes | ≥205 MPa | ≥415 MPa | ≥22% | HBW ≤183 / HRB ≤89 / HV ≤200 |
| A50 for t ≤3 mm; elongation/hardness reference only if t <0.3 mm. | |||||
ASTM A240 covers flat products; EN 10028-7 is for pressure-purpose flat products. JIS G4305 and GB/T 3280 cover cold-rolled flat products. Their cold-rolled values must not be used as acceptance limits for hot-rolled plate, bars or profiles. Confirm the standard edition and all supplementary requirements in the purchase order and mill test certificate.
Chemical values are cast-analysis mass percentages. A dash/omitted element means no limit stated in the selected table, never zero content. Cross-standard grade names are comparison references, not automatic equivalence or proof of Sheye certification.
441 is a trade/family label; confirm exact EN1.4509 designation and dual Ti/Nb stabilization.
Chemistry is heat-analysis mass percent. Omitted elements have no requirement in the cited row, not zero. A480/A480M governs product-analysis tolerances and general requirements. Mechanical values use the printed SI column. ASTM regards SI and inch-pound systems as independent: do not convert ksi to generate an SI acceptance limit. Room-temperature Table 2 reference properties. Confirm delivery heat treatment, specimen preparation, dimensional tolerances and all general requirements against the contractual A480/A480M edition. Yield is based on 0.2% offset; a 0.5% total-extension-under-load alternative is permitted unless otherwise specified. Elongation gauge length is 50 mm or 2 in. HBW and the specified Rockwell scale are alternative permissible methods; thin-gauge superficial hardness provisions apply. The full 2026 numerical tables were not available for verification. Display the reference edition and confirm the contractual edition and certificate before accepting an order.
A441 trade label does not uniquely identify ASTM chemistry or mechanical limits. Confirm S44100,S43940 or S43932 on the mill certificate.
UNS S44100: 414MPa tensile and241MPa yield are the SI figures printed in the cited edition.
UNS S43940 (commercial441/1.4509 reference): Distinct from S44100. Outokumpu identifies Core441/4509 as S43940.
UNS S43932 (commercial441 reference): Distinct from S44100 and S43940. Aperam identifies commercial K41 as S43932/S43940.
JSA confirms the 2021 edition remains valid and was reaffirmed on 20 October 2025. Full purchased normative tables and all footnotes were not available for a complete current-edition audit. Listed chemistry is mass percent from primary JIS-grade summaries, not typical mill analysis. Missing cells mean not reproduced or not verified, not zero. Mechanical limits apply to the stated annealed/solution-treated cold-rolled condition at room temperature. Sampling, gauge length, direction, thickness-related rules and acceptance methods require the contractual standard. Corresponding designations are comparisons, not unconditional equivalence or proof that every supplied heat meets all listed standards.
No exact SUS441 designation or complete G4305 counterpart was established in the primary JIS grade sources. Do not relabel another Ti/Nb-stabilized ferritic grade as an identical JIS grade.
Chemistry is heat analysis, mass %. The GB designation is a related reference, not automatic cross-standard certification. For thickness below 0.3 mm, elongation and hardness are reference values only. A50 is used at thickness ≤3 mm. Mechanical testing of re-rolling feedstock is performed when requested and specified in the contract (8.2). Ti/Nb-stabilized GB reference for comparison. The commercial name 441 alone does not identify a unique specification; confirm mill designation and Ti/Nb limits.
Reference review: 9 September 2026 · Sheye Metal
SHEYE SUPPLY
Sheye supplies 441 in coils, strips, sheets. Specify thickness, width or cut length, finish, quantity and the required delivery condition so the material and processing route can be reviewed together.
A ferritic grade sold under multiple Ti/Nb-stabilized specifications. The commercial name alone does not define the UNS or GB designation. Specify the full grade designation and standard edition in the enquiry. Any dual-standard certification must be confirmed for the actual material.
Include the mill test certificate requirements, heat traceability, dimensional tolerances and any additional tests. For processed coils or strip, also state edge condition, coil inside diameter, coil weight and surface protection. Processing feasibility is reviewed against the material strength and dimensions.
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