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Published: November 7, 2025 | Updated: November 7, 2025By Gangsteel Engineering Team – 25+ Years in Stainless Steel Export Excellence
When precision engineering meets global standards, few materials bridge the gap as effectively as ASTM A240M UNS S41500 metric sheets. This specification, the metric counterpart to A240, outlines chromium and chromium-nickel stainless steel plates, sheets, and strips in SI units for pressure vessels and general applications—making it a staple for international projects where metric consistency is key. As a seasoned producer and exporter from China's advanced mills, Gangsteel has rolled out thousands of tons of these sheets, supplying metric-compliant stock to European refineries, Asian power grids, and Middle Eastern desalination hubs. If you're a metric-minded fabricator calculating tolerances in millimeters or a procurement pro seeking equivalents for seamless integration, this guide packs the metric details you need: from sheet dimensions to mechanical metrics, all infused with our practical know-how.
Recall a 2024 collaboration with a German automotive supplier: they needed 10mm thick A240M S41500 sheets for turbo housings, spec'd in metric to DIN tolerances. Our delivery not only hit the mark on flatness (under 1mm/m) but also weathered high-temp exhaust gases without oxidation—extending part life by 25%, per their fatigue tests. UNS S41500, a martensitic stainless (F6NM lineage), thrives in metric sheets thanks to its low-carbon formula that balances hardness with formability. In this metric-focused overview, we'll dissect specs in kg, mm, and MPa, cross-reference equivalents, and share sourcing strategies. Rooted in our daily mill runs and ISO audits, this isn't abstract data—it's metric mastery to fuel your builds.
ASTM A240M tailors the A240 spec for metric users, mandating dimensions in mm, masses in kg, and stresses in MPa—essential for EU CE marking or ISO 9001 compliance. UNS S41500 sheets under this standard excel where moderate corrosion pairs with high strength: think mm-thick linings for chemical tanks or precision-cut strips for valve internals. Its martensitic structure, tempered for toughness, yields a PREN ~19, outperforming metric 410 sheets in pitting while costing less than duplex.
Gangsteel produces these in metric coils up to 2500mm wide, with thicknesses from 0.5mm to 50mm—hot-rolled for robustness or cold-reduced for mirror finishes. Density at 7850 kg/m³ ensures predictable mass calcs (e.g., a 2000mm x 1000mm x 10mm sheet weighs ~157 kg), aiding logistics in metric-driven markets. We've seen these sheets boost efficiency in wind turbine nacelles, where metric precision cut assembly time 15%. For broader metric options, explore our UNS stainless steel plates lineup.
A240M UNS S41500 sheets undergo metric-based testing: thickness in mm, hardness in HRB, impacts in J. Gangsteel enhances with laser gauging for ±0.1mm accuracy, ensuring sheets meet global metric norms like EN 10088.
Chemistry is calibrated for martensitic stability, with low residuals in metric melts to prevent mm-scale defects.
|
Element |
% Range (ASTM A240M) |
Gangsteel Typical |
Metric Impact on Sheets |
|---|---|---|---|
|
Carbon (C) |
0.05 max |
0.02-0.04 |
Low for mm-deep welds without cracks; enhances formability. |
|
Manganese (Mn) |
0.50-1.00 |
0.60-0.80 |
Refines grain for uniform mm thicknesses. |
|
Silicon (Si) |
0.60 max |
0.30-0.50 |
Controls oxidation in hot-rolling to mm precision. |
|
Phosphorus (P) |
0.030 max |
<0.015 |
Minimizes brittleness in thin mm gauges. |
|
Sulfur (S) |
0.030 max |
<0.010 |
Aids machining without pitting in metric cuts. |
|
Chromium (Cr) |
11.50-14.00 |
12.50-13.20 |
Boosts corrosion in mm-thick passivated layers. |
|
Molybdenum (Mo) |
0.50-1.00 |
0.60-0.80 |
Fights chlorides; key for metric offshore sheets. |
|
Nickel (Ni) |
3.50-5.50 |
4.20-4.80 |
Stabilizes structure for consistent mm bends. |
|
Nitrogen (N) |
0.10 max |
<0.05 |
Strengthens without porosity in metric coils. |
|
Iron (Fe) |
Balance |
>82.00 |
Matrix for 7850 kg/m³ density calcs. |
Gangsteel's metric melts include full spectrometry, with certs in kg/m² equivalents for area-based pricing.
Post-anneal (1010-1120°C) and temper (565-760°C), A240M sheets hit metric benchmarks per EN ISO 6892-1 tensile tests.
|
Property |
Min Value (Annealed + Tempered) |
Typical Gangsteel Sheet |
Metric Application Notes |
|---|---|---|---|
|
Tensile Strength (MPa) |
795 |
850-920 |
Supports MPa stresses in mm-thick vessels. |
|
Yield Strength (0.2% Offset, MPa) |
620 |
680-750 |
Ensures mm deflection limits in loads. |
|
Elongation (%) |
15 (in 50mm) |
18-22 |
Allows mm-radius bends without tears. |
|
Hardness (HRB) |
32 max |
25-30 |
Metric for Rockwell checks; tempers evenly. |
|
Reduction of Area (%) |
40 |
45-55 |
Gauges mm-necking in pulls. |
|
Charpy V-Notch Impact (J) |
27 @ -18°C |
32-40 @ -46°C |
Absorbs J in mm-notches for cold service. |
In metric elevated temps (300°C), tensile holds 92%; cryogenic (-196°C) yield rises 12%. Our labs verify in J and MPa, with sheets acing 50mm gauge elongations.
A240M UNS S41500 sheets align with metric standards, facilitating swaps in SI-centric regions. Gangsteel dual-specs for borderless sourcing.
Vs. metric 316L sheets, S41500 yields 620 MPa at 30% less cost, trading PREN (19 vs. 24). In a 2025 French nuclear swap, we equated A240M to EN 1.4313 sheets, halving cert timelines. For ASME metric, see our ASME SA240/SA240M offerings.
A240M S41500 metric sheets line metric tanks (EN 13445), clad heat exchangers, and form mm-precision baffles. In renewables, 5mm sheets shield solar frames from UV/corrosion.
Gangsteel tale: 2024, a Swedish biofuel plant used 8mm metric sheets for fermenters—resisted 100°C acids without mm-scale pitting, per TUV inspections. Or an Australian mining's 20mm strips in conveyors: cut wear 35% vs. carbon metric plates.
November 2025 pricing for A240M UNS S41500 metric sheets: $2,600-2,800 USD per ton FOB, metric ton basis. 10mm x 2000mm x 6000mm: ~$2,600 base; polished +$150/ton.
Gangsteel value: Metric laser-cutting in-house, 98% compliance. Pair with ASTM A240 /A240M for hybrid metric/imperial.
Q: What are the core metric specs for ASTM A240M UNS S41500 sheets?A: Thickness 0.5-50mm, tensile 795 MPa min, yield 620 MPa min, elongation 15% min, HRB 32 max. Metric for SI compliance; Gangsteel's sheets achieve 850 MPa tensile in 10mm gauges for UNS S41500 stainless steel plate apps.
Q: How do A240M UNS S41500 metric sheets compare to EN 1.4313?A: Equivalent chemistry (Cr 11.5-14%), MPa strengths match—use 1.4313 for EU metric. A240M offers U.S. cert flexibility. Swapped in a 2024 Dutch project, saving 20% on metric conversions.
Q: Current pricing for ASTM A240M UNS S41500 metric sheets?A: $2,600-2,800/ton FOB metric ton; bulk to $2,500. Q4 stable; thickness adds $100-200/ton. Our metric exports undercut by 25%—quotes in kg/m².
Q: Are A240M UNS S41500 sheets NACE-ready in metric?A: Yes—MR0175 at HRB <32, HIC-resistant. Yield 620 MPa for 10% H2S/150°C. Supplied 5 metric tons to Norway; passed metric immersion tests.
Q: Ideal heat treatment for A240M S41500 metric sheets?A: Anneal 1010°C, quench, temper 620°C/2hrs for HRB 28-32. Elongation 18% in 50mm; avoids mm-scale warping. Our metric HT ensures uniformity in 2500mm widths.
Q: Top metric equivalents for ASTM A240M UNS S41500?A: EN 10088-2 1.4313 (mm sheets), JIS G4305 SUS 415. 1.4313 for CE; SUS 415 for Asian metric. Dual-rolled at Gangsteel—eased a Japanese client's metric certs by 30 days.
Q: Quality assurance for A240M UNS S41500 metric sheets?A: 100% UT (mm-level), tensile ISO 6892, chem A751. ISO 9001 mills; zero 2025 issues. Complements UNS stainless steel plates for metric hybrids.
Q: Lead times and MOQ for custom A240M S41500 metric sheets?A: MOQ 1 metric ton; stock 7 days, custom 21. Expedite +$150/ton for 5 days. Air-shipped 2 metric tons to UK in 8 days amid rush.
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