{"product_id":"stainless-steel-sheet-bright-polish-304-grade-a2-12-14-16mm","title":"Stainless Steel Sheet Bright Polish 12mm 14mm 16mm Thick Many Size Grade A2 304","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eGrade A2 304 Stainless Steel Sheet — Bright Polished Finish, 12–16mm Thick\u003c\/h2\u003e\n\u003cp\u003eWhen a project demands a flat metal surface that won't corrode, warp, or lose its finish over time, most builders and fabricators run into the same problem: sourcing thick stainless sheet in the exact footprint they need without ordering oversized stock and paying to cut it down. These Grade A2 304 stainless steel sheets are stocked in 13 footprint sizes and three thicknesses — 12mm, 14mm, and 16mm — so engineers, metalworkers, and serious DIYers can match the blank to the job rather than the other way around.\u003c\/p\u003e\n\u003cp\u003eEach sheet is manufactured from Grade A2 (AISI 304) austenitic stainless steel and finished with a bright polish on the face. Footprints range from 50mm × 50mm (approx. 2\" × 2\") up to 450mm × 450mm (approx. 17.7\" × 17.7\"), with thicknesses of 12mm (~0.47\"), 14mm (~0.55\"), and 16mm (~0.63\"). The bright-polished surface has a typical Ra surface roughness consistent with a #4 or mirror-adjacent finish, providing a clean, reflective appearance straight from stock.\u003c\/p\u003e\n\u003cp\u003eTypical applications include structural base plates and machinery mounting pads where corrosion resistance is non-negotiable, fabrication of food-grade equipment frames and worktops, marine hardware backing plates, and architectural accent panels in coastal or high-humidity environments. The combination of solid thickness and 304 alloy composition makes these sheets well-suited for load-bearing brackets, weld-on gussets, and custom enclosure walls in industrial settings.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e\n\u003cstrong\u003eCompatibility note:\u003c\/strong\u003e Grade A2 (304) stainless is suitable for most indoor, outdoor, and light marine environments. For highly chlorinated or salt-spray-intensive applications, consider Grade A4 (316) instead. Confirm dimensional tolerances with your fabricator before ordering for precision-fit assemblies.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Grade A2 304 Stainless Steel Sheets\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔬\u003c\/span\u003e \u003cstrong\u003eGrade A2 (AISI 304) Alloy\u003c\/strong\u003e — Austenitic composition with ≥18% chromium and ≥8% nickel delivers reliable corrosion resistance across a wide range of environments, including food-contact and outdoor exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✨\u003c\/span\u003e \u003cstrong\u003eBright Polished Face Finish\u003c\/strong\u003e — The reflective surface finish reduces surface contamination adhesion and provides a clean aesthetic for visible installations without additional finishing work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eThree Solid Thicknesses: 12mm, 14mm, 16mm\u003c\/strong\u003e — Substantial gauge options support structural, load-bearing, and heavy fabrication tasks where thin sheet would flex or fail under stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🗂️\u003c\/span\u003e \u003cstrong\u003e13 Footprint Sizes in One Listing\u003c\/strong\u003e — From compact 50×50mm blanks to 450×450mm plates, select the closest match to your cut list and reduce material waste on the bench.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCorrosion and Oxidation Resistant\u003c\/strong\u003e — The passive chromium oxide layer self-repairs in oxygen-rich environments, maintaining surface integrity without coatings or ongoing treatment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eWeldable and Machinable\u003c\/strong\u003e — 304 stainless responds well to TIG and MIG welding, drilling, and milling with appropriate tooling, making these sheets compatible with standard fabrication workflows.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Stainless Steel Sheet\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eGrade A2 Austenitic Stainless Steel (AISI 304)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBright Polish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Thicknesses\u003c\/th\u003e\n\u003ctd\u003e12mm (~0.47\"), 14mm (~0.55\"), 16mm (~0.63\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Footprints (L × W)\u003c\/th\u003e\n\u003ctd\u003e50×50mm up to 450×450mm — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChromium Content\u003c\/th\u003e\n\u003ctd\u003e≥18%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNickel Content\u003c\/th\u003e\n\u003ctd\u003e≥8%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTensile Strength (typical)\u003c\/th\u003e\n\u003ctd\u003e515–720 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eYield Strength (typical)\u003c\/th\u003e\n\u003ctd\u003e≥205 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardness (typical)\u003c\/th\u003e\n\u003ctd\u003e≤201 HB (Brinell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnetic Properties\u003c\/th\u003e\n\u003ctd\u003eNon-magnetic in annealed condition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Continuous Service Temp.\u003c\/th\u003e\n\u003ctd\u003e~870°C (1600°F) in air\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight per Variant\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece (per variant selected)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right thickness — 12mm, 14mm, or 16mm?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe right thickness depends on the load and application. 12mm is suitable for moderate structural brackets, backing plates, and decorative panels where some rigidity is needed but weight is a concern. 14mm suits heavier mounting pads and machinery bases with moderate dynamic loads. 16mm is the choice for high-load structural applications, thick weld-on gussets, or situations where deflection under load must be minimized. If you are unsure, calculate the expected bending stress for your span and load, then select the thickness with an appropriate safety factor.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs Grade A2 (304) stainless steel strong enough for structural use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, for most structural fabrication tasks. Grade A2 304 stainless has a typical tensile strength of 515–720 MPa and a minimum yield strength of 205 MPa. At 12–16mm thickness, these sheets provide substantial section modulus for brackets, base plates, and frames. For applications with extreme dynamic loading or highly corrosive environments (such as offshore marine), consult a structural engineer and consider whether Grade A4 (316) or a duplex alloy is more appropriate.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this sheet rust or corrode outdoors?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eGrade A2 304 stainless forms a passive chromium oxide layer that resists rust and oxidation in most outdoor environments, including rain, humidity, and mild industrial atmospheres. However, in environments with prolonged exposure to chlorides — such as coastal salt spray or swimming pool surrounds — surface staining or pitting can occur over time. For those conditions, Grade A4 (316) stainless, which contains molybdenum, offers better chloride resistance. Regular rinsing with fresh water extends the service life of 304 in borderline environments.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I weld or machine these sheets with standard equipment?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Grade 304 stainless is one of the most commonly welded and machined stainless alloys. TIG welding is preferred for clean, low-distortion joints; MIG welding is also effective for thicker sections. Use 308L filler wire for TIG\/MIG. For machining, use sharp carbide tooling, lower cutting speeds than mild steel, and adequate coolant to manage work-hardening. Drilling requires cobalt or carbide drill bits and a consistent feed rate to avoid work-hardening the entry point.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich size should I order if my required dimensions fall between two listed options?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eOrder the next size up from your required finished dimension to allow for cutting, squaring, and any edge cleanup. For example, if your finished part needs to be 180mm × 180mm, the 200mm × 200mm blank gives you 10mm of trim allowance on each edge. If you need a non-standard footprint not listed, contact us to confirm availability of custom cut sizes.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the bright polish finish on both sides of the sheet?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe bright polish finish is applied to the face (top) surface. The reverse side typically has a mill or dull finish consistent with the rolling and processing of thick-gauge plate. If a polished finish on both faces is required for your application, contact us to confirm before ordering, as this may vary by batch.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I select the right footprint for a base plate or mounting pad application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure the bolt circle diameter or the footprint of the equipment being mounted, then add at least 10–20mm of edge distance beyond the outermost fastener hole on each side. This edge distance prevents stress cracking around bolt holes under load. Choose the listed size that accommodates your required footprint plus edge distance, then drill or cut to final dimensions on your bench.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your size (Length × Width × Thickness) above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right thickness — 12mm, 14mm, or 16mm?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The right thickness depends on the load and application. 12mm is suitable for moderate structural brackets, backing plates, and decorative panels. 14mm suits heavier mounting pads and machinery bases. 16mm is the choice for high-load structural applications where deflection must be minimized.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is Grade A2 (304) stainless steel strong enough for structural use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Grade A2 304 stainless has a typical tensile strength of 515–720 MPa and a minimum yield strength of 205 MPa, making it suitable for brackets, base plates, and frames at 12–16mm thickness.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this sheet rust or corrode outdoors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Grade A2 304 stainless resists rust in most outdoor environments. In high-chloride environments such as coastal salt spray, Grade A4 (316) offers better resistance. Regular rinsing with fresh water extends service life in borderline conditions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I weld or machine these sheets with standard equipment?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Grade 304 is readily welded with TIG or MIG using 308L filler wire, and machined with carbide tooling at reduced speeds with coolant to manage work-hardening.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which size should I order if my required dimensions fall between two listed options?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Order the next size up to allow for cutting and edge cleanup. For example, a 180×180mm finished part fits within the 200×200mm blank with 10mm trim allowance per edge.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the bright polish finish on both sides of the sheet?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The bright polish is applied to the face (top) surface. The reverse side typically has a mill or dull finish. Contact us if a polished finish on both faces is required.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I select the right footprint for a base plate or mounting pad application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Add at least 10–20mm of edge distance beyond the outermost fastener hole on each side, then choose the listed size that accommodates your footprint plus edge distance.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"50mm X 50mm X 12mm \/ 1","offer_id":52379021246738,"sku":"WWLFABGQJDWW172x1","price":56.7,"currency_code":"USD","in_stock":true},{"title":"100mm X 50mm X 12mm \/ 1","offer_id":52379021279506,"sku":"WWLFABGQJDWW173x1","price":54.13,"currency_code":"USD","in_stock":true},{"title":"100mm X 100mm X 12mm \/ 1","offer_id":52379021312274,"sku":"WWLFABGQJDWW174x1","price":103.99,"currency_code":"USD","in_stock":true},{"title":"200mm X 100mm X 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