Overview
We supply sheet, plate, coil, strip and bar, with cutting, forming and fabricated furnace parts to drawing. Dimensions, delivery condition and availability are confirmed in our quotation.
Standards & Designations
- EN 1.4841 X15CrNiSi25-21
310Si2 is our commercial enquiry name. We quote EN 1.4841 X15CrNiSi25-21 and state that designation on the order and MTC; the name is not an automatic ASTM equivalence.
Chemical Composition
The elevated silicon content and higher chromium/nickel balance distinguish EN 1.4841 from EN 1.4828. The table below is the flat/long-product reference, not a universal composition for every commercial Si2 product.
Scroll horizontally to see every column.
| Property | Value | Unit |
|---|---|---|
| C | ≤0.20 | mass % |
| Si | 1.50–2.50 | mass % |
| Cr | 24.00–26.00 | mass % |
| Ni | 19.00–22.00 | mass % |
| Mn | ≤2.00 | mass % |
| P | ≤0.045 | mass % |
| S | ≤0.015 | mass % |
| N | ≤0.11 | mass % |
Reference basis: EN 1.4841 / X15CrNiSi25-21 · flat or long product · specification limits · room temperature · limits.
Mechanical Properties
Reference: annealed flat material, thickness ≤12 mm, tested at room temperature. Rp0.2 is proof strength; Rm is tensile strength. These values do not replace creep or design data and do not apply automatically to tubes or cold-worked parts.
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| Property | Value | Unit |
|---|---|---|
| 0.2% proof strength, Rp0.2 | ≥230 | MPa |
| Tensile strength, Rm | 550–750 | MPa |
Reference basis: EN 1.4841 / X15CrNiSi25-21 · flat material up to 12 mm · solution annealed · room temperature · ranges.
Physical Properties
At 20°C, technical references for these EN grades give typical densities of 7800 kg/m³ and 7900 kg/m³. Use the density agreed for your material in Custom Density; the calculator does not assume a value for either commercial Si2 name.
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| Property | Value | Unit |
|---|---|---|
| Density at 20°C | 7.8 | kg/dm³ |
| Modulus of elasticity at 20 / 400 / 800°C | 196 / 150 / 120 | GPa |
| Thermal expansion, 20°C to 200 / 400 / 800°C | 18.8 / 19.4 / 20.0 | 10⁻⁶/K |
| Thermal conductivity at 20 / 400 / 800°C | 15 / 19 / 25 | W/m·K |
| Specific heat capacity at 20°C | 472 | J/kg·K |
| Electrical resistivity at 20°C | 0.96 | µΩ·m |
Reference basis: EN 1.4841 / X15CrNiSi25-21 · flat product · typical producer values · temperatures stated in each row · typical values.
High-Temperature Characteristics
About 1150°C is an air-oxidation screening reference. Sulfur-bearing and strongly carburizing gases require specific assessment; prolonged intermediate-temperature exposure can cause embrittlement. Loaded parts also need creep assessment.
Available Product Forms
Choose the form that fits the component geometry and fabrication plan, then use its product page to prepare dimensions, finish, processing, inspection and packing requirements.
The product-form list shows our regular supply capability. The dated stock table shows only current and common inventory; a form or boundary size not listed there is not a supply limit.
Common specifications and stock
Stock snapshot:
The product-form list shows our regular supply capability. The dated stock table shows only current and common inventory; a form or boundary size not listed there is not a supply limit.
Scroll horizontally to see every column.
| Product form | Specification | Surface / condition | Availability |
|---|---|---|---|
| Cold-rolled sheet | 1.5 × 1219 × 2438 mm | 2D · Solution annealed | In stock |
| Hot-rolled plate | 4 × 1500 × 6000 mm | No.1 · Solution annealed | Common specificationIn stock |
| Hot-rolled coil | 8 × 1500 mm coil | No.1 · Solution annealed | Common specificationIn stock |
| Slit strip | 1.5 × 100 mm coil | 2D · Solution annealed | In stock |
| Round bar | Ø40 × 6000 mm | Pickled · Hot rolled / solution annealed | In stock |
Please confirm current quantity, tolerances, documents and delivery in the written quotation.
Available Dimensions
We quote dimensions and tolerances for your selected form and quantity; there is no single stock-size range covering every grade and form.
Processing & Welding
We plan joint preparation, forming sequence and distortion control around the drawing. High-silicon material needs a qualified welding procedure and consumables suitable for the specified high-temperature service; pressure fabrication requires separate code and product-standard review.
Processing & WeldingIndustry Applications
We supply material and drawing-based parts for furnace liners, hardening boxes, high-heat supports and heat shields. Review cycling, joint positions and support loads before choosing thickness.
Inspection Options
- MTC identifying the heat, grade, ordered standard and reported test results.
- Dimensional, surface, traceability and marking records specified by the purchase order.
- NDT, PMI, third-party inspection or additional test reports only when ordered.
- EN 10204 3.1 wording only when the issued certificate explicitly carries that type.
Related Grades
310S is the lower-carbon adjacent option; 310Si2 here means the higher-silicon EN 1.4841 material. Compared with 309Si2 / EN 1.4828, it has more chromium and nickel and a higher air-oxidation reference, not an automatic service-life advantage.
Frequently asked questions
How do these grades compare?
310S is the lower-carbon adjacent option; 310Si2 here means the higher-silicon EN 1.4841 material. Compared with 309Si2 / EN 1.4828, it has more chromium and nickel and a higher air-oxidation reference, not an automatic service-life advantage.
Which forms can you supply?
We supply sheet, plate, coil, strip and bar, with cutting, forming and fabricated furnace parts to drawing. Dimensions, delivery condition and availability are confirmed in our quotation.
Does the oxidation temperature define the service limit?
No. An air-oxidation reference is not an allowable stress, component-life promise or universal operating temperature. Atmosphere, thermal cycling, load and section thickness govern material selection.
Which designation should appear on the order and material certificate?
310Si2 is our commercial enquiry name. We quote EN 1.4841 X15CrNiSi25-21 and state that designation on the order and MTC; the name is not an automatic ASTM equivalence.
What needs attention when welding or forming Si2 material?
We plan joint preparation, forming sequence and distortion control around the drawing. High-silicon material needs a qualified welding procedure and consumables suitable for the specified high-temperature service; pressure fabrication requires separate code and product-standard review.
What to Send for a Quote
Send the grade, product form, dimensions or drawing, quantity and destination. We will confirm supply options and prepare a quote.
We normally reply within 1 business day. Technical enquiries may require additional review.