{"product_id":"solid-304-stainless-steel-block-plate-25mm-120mm-grade-304","title":"Solid 304 Stainless Steel Block Plate 20mm 25mm 30mm 35mm - 120mm Grade 304 GS","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eSolid 304 Stainless Steel Block Plate — Precision-Cut, Corrosion-Resistant Stock for DIY \u0026amp; Fabrication\u003c\/h2\u003e\n\u003cp\u003eWhen a project demands a material that holds tight tolerances, resists rust, and survives demanding environments, most builders quickly discover that generic mild steel or aluminum simply falls short. These solid 304 stainless steel block plates are designed for makers, machinists, and fabricators who need a reliable, ready-to-machine starting point — whether you're building a custom bracket, a jig, a fixture base, or a structural insert.\u003c\/p\u003e\n\u003cp\u003eEach piece is a solid, single-body block of Grade 304 stainless steel — not hollow, not laminated. Sizes range from compact 25 mm × 25 mm × 25 mm cubes (approximately 1\" × 1\" × 1\") up to larger rectangular slabs such as 100 mm × 100 mm × 60 mm (approximately 3.9\" × 3.9\" × 2.4\"), giving you a wide selection of stock dimensions to match your design without excess material waste. All dimensions are expressed as Width × Height × Length (or Depth) in millimeters.\u003c\/p\u003e\n\u003cp\u003eTypical applications include CNC machining blanks for custom stainless steel block components, welding fixture plates, corrosion-resistant spacer blocks in marine or food-processing environments, and precision shim stock for machinery alignment. The 304 alloy's balanced chromium-nickel composition makes it a go-to choice for solid stainless steel plate stock used in both indoor and outdoor structural applications.\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 These blocks are uncoated, unthreaded solid stock. They are compatible with standard milling, drilling, turning, and grinding operations. Verify your required size against the variant options before ordering — dimensions are listed as W × H × L in mm.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 304 Stainless Steel Block Plates\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧱\u003c\/span\u003e \u003cstrong\u003eSolid one-piece construction\u003c\/strong\u003e — No hollow cores, no welds, no laminations. Each block is cut from solid 304 stainless steel bar or plate stock, giving you consistent density and structural integrity throughout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eGrade 304 corrosion resistance\u003c\/strong\u003e — The 18% chromium \/ 8% nickel composition forms a passive oxide layer that resists rust, staining, and mild chemical exposure — suitable for humid, wet, or food-adjacent environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eWide size range in one listing\u003c\/strong\u003e — Choose from 20+ size variants spanning 25 mm cubes to 100 mm × 100 mm slabs, covering the most common solid stainless steel block plate dimensions used in fabrication and machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eMachinable with standard tooling\u003c\/strong\u003e — Grade 304 is readily drilled, milled, tapped, and ground using carbide or HSS tooling. Surface finish after machining is smooth and consistent, reducing secondary finishing time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e \u003cstrong\u003ePredictable weight for load calculations\u003c\/strong\u003e — Solid 304 stainless steel has a density of approximately 7.93 g\/cm³, allowing accurate weight estimation for structural and load-bearing design work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eWeldable and fastener-ready\u003c\/strong\u003e — 304 stainless accepts MIG and TIG welding with matching filler wire. Blocks can be drilled and tapped for M-series or imperial fasteners to suit your assembly requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Solid Stainless Steel Block Plate\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eGrade 304 Stainless Steel (18\/8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eForm\u003c\/th\u003e\n\u003ctd\u003eSolid block \/ plate (no hollow sections)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes (W × H × L)\u003c\/th\u003e\n\u003ctd\u003eSee variant options (25 mm cube to 100 × 100 × 60 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece (single unit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eMill finish (as-cut; unpolished)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDensity\u003c\/th\u003e\n\u003ctd\u003eApprox. 7.93 g\/cm³\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChromium Content\u003c\/th\u003e\n\u003ctd\u003e17.5–19.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNickel Content\u003c\/th\u003e\n\u003ctd\u003e8.0–10.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTensile Strength\u003c\/th\u003e\n\u003ctd\u003eTypically 515–620 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eYield Strength\u003c\/th\u003e\n\u003ctd\u003eTypically 205 MPa minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003ctd\u003eTypically ≤ 201 HB (annealed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnetic\u003c\/th\u003e\n\u003ctd\u003eSlightly magnetic after cold working; generally non-magnetic in annealed state\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeldability\u003c\/th\u003e\n\u003ctd\u003eGood — MIG\/TIG with 308L filler recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eSee variant options (varies by size)\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\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right block size for my project?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStart with your finished part dimensions and add machining allowance — typically 2–5 mm per face for milling or grinding. If your finished part is 45 mm × 45 mm × 45 mm, ordering the 50 mm × 50 mm × 50 mm variant gives you enough stock to clean up all faces. For rectangular parts, match the longest dimension to the block's longest axis to minimize waste.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eIs Grade 304 stainless steel strong enough for structural or load-bearing use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eGrade 304 has a minimum tensile strength of approximately 515 MPa and a yield strength of around 205 MPa, which is adequate for many structural brackets, spacers, and fixture components. For applications involving high cyclic loads, impact, or elevated temperatures above 870 °C, consider Grade 316 or a higher-alloy steel instead.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWill these blocks rust or corrode outdoors?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eGrade 304 stainless steel forms a self-healing chromium oxide passive layer that resists rust in most outdoor and humid environments. It performs well in freshwater and mild atmospheric conditions. In coastal or high-chloride environments (saltwater splash zones), Grade 316 offers better pitting resistance. Avoid prolonged contact with chloride-containing chemicals or bleach-based cleaners.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I weld these blocks to other stainless steel parts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Grade 304 is readily welded using TIG or MIG processes with ER308L filler wire. For best results, clean the weld area with a dedicated stainless steel wire brush (not carbon steel) to avoid contamination. Post-weld passivation or pickling is recommended for corrosion-critical applications to restore the passive layer in the heat-affected zone.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these blocks compatible with standard drill bits and taps?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, but 304 stainless work-hardens quickly, so use sharp carbide or cobalt-grade HSS drill bits with cutting fluid and a moderate feed rate. Avoid dwelling or stopping mid-cut. For tapping, use a spiral-flute tap with cutting oil and back off every half-turn to break chips. Recommended tap drill sizes follow standard metric or imperial charts for the thread you need.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I decide between a square block and a rectangular block variant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eSquare blocks (e.g., 25 × 25 × 25 mm, 50 × 50 × 50 mm) are ideal when you need equal stock on all axes — common for cube-shaped fixtures, spacers, or symmetric brackets. Rectangular variants (e.g., 30 × 50 × 100 mm) suit parts with one dominant long dimension, such as rails, slide blocks, or mounting pads, and reduce material cost compared to cutting down a larger square block.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the surface finish on these blocks as delivered?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBlocks are supplied with a mill finish — the natural as-cut surface from saw or shear cutting. This finish is functional but not decorative. If you need a specific surface roughness (Ra), plan for a facing or grinding operation. For a mirror or brushed appearance, secondary polishing with progressively finer abrasives (120 → 240 → 400 grit) is straightforward on 304 stainless.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your Size and Amount 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 block size for my project?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Start with your finished part dimensions and add machining allowance — typically 2–5 mm per face for milling or grinding. If your finished part is 45 mm × 45 mm × 45 mm, ordering the 50 mm × 50 mm × 50 mm variant gives you enough stock to clean up all faces.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is Grade 304 stainless steel strong enough for structural or load-bearing use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Grade 304 has a minimum tensile strength of approximately 515 MPa and a yield strength of around 205 MPa, adequate for many structural brackets, spacers, and fixture components.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will these blocks rust or corrode outdoors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Grade 304 forms a self-healing chromium oxide passive layer that resists rust in most outdoor and humid environments. 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For a specific surface roughness or decorative finish, plan for a facing, grinding, or polishing operation.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"25mm×25mm×25mm \/ 1 Pcs","offer_id":52379025604882,"sku":"WBJHHZGY-BJ2605-01MJS001x1","price":25.5,"currency_code":"USD","in_stock":true},{"title":"30mm×30mm×30mm \/ 1 Pcs","offer_id":52379025637650,"sku":"WBJHHZGY-BJ2605-01MJS002x1","price":32.63,"currency_code":"USD","in_stock":true},{"title":"35mm×35mm×35mm \/ 1 Pcs","offer_id":52379025670418,"sku":"WBJHHZGY-BJ2605-01MJS003x1","price":46.09,"currency_code":"USD","in_stock":true},{"title":"40mm×40mm×40mm \/ 1 Pcs","offer_id":52379025703186,"sku":"WBJHHZGY-BJ2605-01MJS004x1","price":69.35,"currency_code":"USD","in_stock":true},{"title":"45mm×45mm×45mm \/ 1 Pcs","offer_id":52379025735954,"sku":"WBJHHZGY-BJ2605-01MJS005x1","price":92.47,"currency_code":"USD","in_stock":true},{"title":"50mm×50mm×50mm \/ 1 Pcs","offer_id":52379025768722,"sku":"WBJHHZGY-BJ2605-01MJS006x1","price":127.01,"currency_code":"USD","in_stock":true},{"title":"55mm×55mm×55mm \/ 1 Pcs","offer_id":52379025801490,"sku":"WBJHHZGY-BJ2605-01MJS007x1","price":162.86,"currency_code":"USD","in_stock":true},{"title":"60mm×60mm×60mm \/ 1 Pcs","offer_id":52379025834258,"sku":"WBJHHZGY-BJ2605-01MJS008x1","price":204.2,"currency_code":"USD","in_stock":true},{"title":"65mm×65mm×65mm \/ 1 Pcs","offer_id":52379025867026,"sku":"WBJHHZGY-BJ2605-01MJS009x1","price":263.64,"currency_code":"USD","in_stock":true},{"title":"70mm×70mm×70mm \/ 1 Pcs","offer_id":52379025899794,"sku":"WBJHHZGY-BJ2605-01MJS010x1","price":318.23,"currency_code":"USD","in_stock":true},{"title":"80mm×80mm×80mm \/ 1 Pcs","offer_id":52379025932562,"sku":"WBJHHZGY-BJ2605-01MJS011x1","price":469.4,"currency_code":"USD","in_stock":true},{"title":"20mm×30mm×40mm \/ 1 Pcs","offer_id":52379025965330,"sku":"WBJHHZGY-BJ2605-01MJS015x1","price":30.72,"currency_code":"USD","in_stock":true},{"title":"30mm×40mm×50mm \/ 1 Pcs","offer_id":52379025998098,"sku":"WBJHHZGY-BJ2605-01MJS016x1","price":64.18,"currency_code":"USD","in_stock":true},{"title":"30mm×50mm×80mm \/ 1 Pcs","offer_id":52379026030866,"sku":"WBJHHZGY-BJ2605-01MJS017x1","price":116.13,"currency_code":"USD","in_stock":true},{"title":"30mm×50mm×100mm \/ 1 Pcs","offer_id":52379026063634,"sku":"WBJHHZGY-BJ2605-01MJS018x1","price":145.64,"currency_code":"USD","in_stock":true},{"title":"30mm×50mm×120mm \/ 1 Pcs","offer_id":52379026096402,"sku":"WBJHHZGY-BJ2605-01MJS019x1","price":171.62,"currency_code":"USD","in_stock":true},{"title":"100mm×100mm×30mm \/ 1 Pcs","offer_id":52379026129170,"sku":"WBJHHZGY-BJ2605-01MJS020x1","price":275.47,"currency_code":"USD","in_stock":true},{"title":"100mm×100mm×40mm \/ 1 Pcs","offer_id":52379026161938,"sku":"WBJHHZGY-BJ2605-01MJS021x1","price":382.23,"currency_code":"USD","in_stock":true},{"title":"100mm×100mm×50mm \/ 1 Pcs","offer_id":52379026194706,"sku":"WBJHHZGY-BJ2605-01MJS022x1","price":467.55,"currency_code":"USD","in_stock":true},{"title":"100mm×100mm×60mm \/ 1 Pcs","offer_id":52379026227474,"sku":"WBJHHZGY-BJ2605-01MJS023x1","price":581.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_c1a09bcd-a383-4290-8218-09e42e0e278d.jpg?v=1781771196","url":"https:\/\/homediyer.com\/de\/products\/solid-304-stainless-steel-block-plate-25mm-120mm-grade-304","provider":"HomeDIYer","version":"1.0","type":"link"}