CNC Weldments guidesGuides for engineers and buyers sourcing welded and machined structures.https://cncweldments.com/Lamellar Tearing: When a Weldment Needs Z35 Plate and When Joint Design Is Cheaperhttps://cncweldments.com/blog/lamellar-tearing-z-grade-plate-weldments/https://cncweldments.com/blog/lamellar-tearing-z-grade-plate-weldments/Lamellar tearing in thick plate T and corner joints: cause, Z15 Z25 Z35 through-thickness grades to EN 10164, design fixes and what to specify on the drawing.Sun, 18 Oct 2026 00:00:00 GMTPress Frame Weldments: Stiffness, Flatness and the Machined Faces That Make a Press Accuratehttps://cncweldments.com/blog/hydraulic-press-frame-machined-weldment/https://cncweldments.com/blog/hydraulic-press-frame-machined-weldment/Press frame weldment guide: C-frame and four-post designs, deflection targets, thick plate welding, stress relief, machined faces and cylinder bores, and RFQ content.Sat, 17 Oct 2026 00:00:00 GMTWhat a Horizontal Boring Mill Does for a Welded Frame That a Machining Centre Cannothttps://cncweldments.com/blog/horizontal-boring-mill-weldment-machining/https://cncweldments.com/blog/horizontal-boring-mill-weldment-machining/How horizontal boring mills machine large weldments: table and floor types, spindle reach, rotary table indexing, setup count and what to ask a shop at quote stage.Fri, 16 Oct 2026 00:00:00 GMTStainless Frames for Food and Packaging Machines: Hygienic Welds, Finishes and Machined Interfaceshttps://cncweldments.com/blog/food-packaging-machinery-weldments/https://cncweldments.com/blog/food-packaging-machinery-weldments/Food machinery weldments in stainless steel: hygienic design, continuous welds, radii, surface finish, pickling, passivation, machined interfaces and what to put in the RFQ.Thu, 15 Oct 2026 00:00:00 GMTHow to Pick Filler Metal: Strength Match, Toughness, Hydrogen and Machinabilityhttps://cncweldments.com/blog/filler-metal-selection-machined-weldments/https://cncweldments.com/blog/filler-metal-selection-machined-weldments/Filler metal selection for machined weldments: strength matching, classification codes, low hydrogen control, effect of stress relief and how weld metal machines.Wed, 14 Oct 2026 00:00:00 GMTGearbox Housing as a Weldment or a Casting: Quantity, Stiffness, Noise and Oil Tightnesshttps://cncweldments.com/blog/fabricated-gearbox-housing-weldment-vs-casting/https://cncweldments.com/blog/fabricated-gearbox-housing-weldment-vs-casting/Fabricated gearbox housing versus casting: stiffness, damping, tooling cost, batch size, bore alignment, oil tightness, cleanliness and the machining plan for a welded housing.Tue, 13 Oct 2026 00:00:00 GMTWelding Duplex Stainless Frames: Heat Input, Ferrite Balance and What It Means for Machininghttps://cncweldments.com/blog/duplex-stainless-weldments-ferrite-control/https://cncweldments.com/blog/duplex-stainless-weldments-ferrite-control/Duplex stainless welding for machined weldments: the ferrite and austenite balance, heat input and interpass limits, filler choice, no stress relief and what to specify.Mon, 12 Oct 2026 00:00:00 GMTCharpy Impact Steel for Cold Service: How to Read the Grade and Test the Weld as Wellhttps://cncweldments.com/blog/charpy-low-temperature-steel-weldments/https://cncweldments.com/blog/charpy-low-temperature-steel-weldments/Charpy impact steel for low temperature weldments: how the V-notch test works, S355 J2 and K2 versus N and NL grades, weld and HAZ testing and what to put on the drawing.Sun, 11 Oct 2026 00:00:00 GMTHybrid Design: Where a Cast Steel Node Beats a Welded Joint in a Fabricated Framehttps://cncweldments.com/blog/cast-steel-nodes-fabricated-weldments/https://cncweldments.com/blog/cast-steel-nodes-fabricated-weldments/Cast steel weldment hybrid design: where cast nodes replace complex welded joints, weldable casting grades, tooling cost, NDT, machining stock and when fabrication stays cheaper.Sat, 10 Oct 2026 00:00:00 GMTFarm Machinery Weldments: How Volume, Seasonality and Tolerance Choices Set the Pricehttps://cncweldments.com/blog/agricultural-machinery-weldments-volume-cost/https://cncweldments.com/blog/agricultural-machinery-weldments-volume-cost/Agricultural weldments explained: typical parts, material and plate thickness, jigs and volume tiers, machining tolerances, coating and how annual forecasts lower unit cost.Mon, 05 Oct 2026 00:00:00 GMTPricing a Machined Weldment Without Guessinghttps://cncweldments.com/blog/how-shops-should-price-weldment-work/https://cncweldments.com/blog/how-shops-should-price-weldment-work/A structured way for fabrication shops to price weldment work: separating weld hours from machine hours, costing setups honestly and pricing the risk you are actually carrying.Sat, 26 Sep 2026 00:00:00 GMTWhen to Keep Weldment Work In House and When to Buy Ithttps://cncweldments.com/blog/in-house-vs-outsourced-fabrication/https://cncweldments.com/blog/in-house-vs-outsourced-fabrication/Capacity, capital, skills and risk compared for in house versus outsourced weldment fabrication, and the hybrid most manufacturers settle on.Sat, 26 Sep 2026 00:00:00 GMTHow to Fill a Large Machine That Is Running at Half Loadhttps://cncweldments.com/blog/selling-idle-machine-capacity/https://cncweldments.com/blog/selling-idle-machine-capacity/What fabrication shops with large machining capacity should publish, who to target and how to price fill-in work without damaging the rates on your core customers.Sat, 26 Sep 2026 00:00:00 GMTWhen to Weld a Frame and When to Bolt Ithttps://cncweldments.com/blog/welded-vs-bolted-assemblies/https://cncweldments.com/blog/welded-vs-bolted-assemblies/Stiffness, cost, shipping, repairability and tolerance stack-up compared for welded and bolted structures, plus the hybrid that most large machines actually use.Sat, 26 Sep 2026 00:00:00 GMTWhat a Buyer Is Actually Checking Before They Place the Orderhttps://cncweldments.com/blog/what-buyers-check-before-they-order/https://cncweldments.com/blog/what-buyers-check-before-they-order/The questions serious weldment buyers ask, in the order they ask them, and what a fabrication shop should have ready before the enquiry arrives.Sat, 26 Sep 2026 00:00:00 GMTThe Weldment Enquiries Worth Turning Downhttps://cncweldments.com/blog/when-a-shop-should-decline-an-rfq/https://cncweldments.com/blog/when-a-shop-should-decline-an-rfq/Estimating costs money and a badly won job costs more. The six signals that a weldment enquiry should be declined, and how to decline it without losing the customer.Sat, 26 Sep 2026 00:00:00 GMTThe Six Reasons You Lost That Weldment Enquiryhttps://cncweldments.com/blog/why-shops-lose-weldment-rfqs/https://cncweldments.com/blog/why-shops-lose-weldment-rfqs/Why fabrication shops lose weldment work they could have made: slow response, unexplained pricing, wrong capability signals, no questions asked and quoting the wrong risk.Sat, 26 Sep 2026 00:00:00 GMTWhy No Algorithm Prices a Weldment From a Modelhttps://cncweldments.com/blog/why-weldments-cannot-be-instant-quoted/https://cncweldments.com/blog/why-weldments-cannot-be-instant-quoted/Instant quote platforms price CNC and sheet metal well and struggle with weldments. What a model cannot tell a pricing engine, and what that means for your RFQ.Sat, 26 Sep 2026 00:00:00 GMTWhy a Welded 6061-T6 Frame Is Weaker Than the Plate It Was Cut Fromhttps://cncweldments.com/blog/aluminium-weldments-heat-affected-zone/https://cncweldments.com/blog/aluminium-weldments-heat-affected-zone/What welding does to the strength of 6061-T6 and 5083 aluminium, how wide the heat affected zone is, and how to design and machine an aluminium weldment around it.Mon, 21 Sep 2026 00:00:00 GMTWhen a Large Welded Face Should Be Ground Instead of Milledhttps://cncweldments.com/blog/blanchard-grinding-vs-milling-weldments/https://cncweldments.com/blog/blanchard-grinding-vs-milling-weldments/Blanchard grinding versus milling on large weldment faces: flatness, surface finish, scale and mill scale removal, part size limits and what each route costs.Mon, 21 Sep 2026 00:00:00 GMTPutting Datums and Geometric Tolerances on a Weldment That Moveshttps://cncweldments.com/blog/gdt-on-weldments/https://cncweldments.com/blog/gdt-on-weldments/How to apply datums, flatness, position and parallelism to a machined weldment, why welded and machined features need separate tolerance systems and where ISO 13920 fits.Mon, 21 Sep 2026 00:00:00 GMTThe Questions That Separate a Weldment Shop From a Welding Shophttps://cncweldments.com/blog/how-to-vet-a-weldment-supplier/https://cncweldments.com/blog/how-to-vet-a-weldment-supplier/A practical assessment for machined weldment suppliers: machine travels, crane capacity, stress relief, inspection, qualifications and the questions that reveal real capability.Mon, 21 Sep 2026 00:00:00 GMTWhich Weld Quality Level to Put on Your Drawinghttps://cncweldments.com/blog/iso-5817-weld-quality-levels/https://cncweldments.com/blog/iso-5817-weld-quality-levels/What ISO 5817 quality levels B, C and D actually accept, how the level changes welding cost and rework, and how to apply different levels to different joints.Mon, 21 Sep 2026 00:00:00 GMTWhy One Setup Is Cheaper Than Three on a Two Tonne Framehttps://cncweldments.com/blog/large-weldment-machining-setups/https://cncweldments.com/blog/large-weldment-machining-setups/How machine envelope, crane capacity and the number of setups drive the machining cost and the tolerance risk on a large weldment, and how to design for fewer setups.Mon, 21 Sep 2026 00:00:00 GMTWhy Two Shops Quote the Same Weldment 40% Aparthttps://cncweldments.com/blog/machined-weldment-cost-drivers/https://cncweldments.com/blog/machined-weldment-cost-drivers/The eight lines that decide what a machined weldment costs: plate grade, weld length, quality level, inspection, stress relief, setups, geometric tolerance and freight.Mon, 21 Sep 2026 00:00:00 GMTHow Much Stock to Leave on a Weldment Before You Machine Ithttps://cncweldments.com/blog/machining-allowance-on-weldments/https://cncweldments.com/blog/machining-allowance-on-weldments/How much machining allowance to leave on a welded frame, how to split weldment and machining tolerances on the drawing and where to put the datums.Mon, 21 Sep 2026 00:00:00 GMTWhich Weld Inspection Method to Specify, and on Which Weldshttps://cncweldments.com/blog/ndt-for-weldments/https://cncweldments.com/blog/ndt-for-weldments/Visual, dye penetrant, magnetic particle, ultrasonic and radiographic testing on weldments: what each method finds, what it misses and what it adds to the quote.Mon, 21 Sep 2026 00:00:00 GMTCoating a Weldment Without Ruining the Faces You Just Machinedhttps://cncweldments.com/blog/painting-and-galvanising-machined-weldments/https://cncweldments.com/blog/painting-and-galvanising-machined-weldments/Masking, coating sequence and the distortion risk of hot dip galvanising on machined weldments, plus what to specify so machined faces arrive usable.Mon, 21 Sep 2026 00:00:00 GMTWhat Changes When a Welded Frame Is Stainless Instead of Carbon Steelhttps://cncweldments.com/blog/stainless-steel-weldments/https://cncweldments.com/blog/stainless-steel-weldments/Distortion, sensitisation, back purging, pickling and passivation on 304L and 316L weldments, and what each adds to the cost of a stainless fabricated frame.Mon, 21 Sep 2026 00:00:00 GMTWhen a Welded Frame Needs Stress Relief, and When It Does Nothttps://cncweldments.com/blog/stress-relief-before-machining/https://cncweldments.com/blog/stress-relief-before-machining/Thermal and vibratory stress relief for weldments: when residual stress will move your machined faces, what a PWHT cycle involves and where it belongs in the sequence.Mon, 21 Sep 2026 00:00:00 GMTWhy Your Frame Came Out Bowed, and What a Shop Does About Ithttps://cncweldments.com/blog/weld-distortion-control/https://cncweldments.com/blog/weld-distortion-control/The six causes of weld distortion in large weldments and the controls fabricators use: joint design, weld sequence, heat input, fixturing, prebending and balanced welding.Mon, 21 Sep 2026 00:00:00 GMTHow to Read and Write the Weld Symbols on Your Own Drawinghttps://cncweldments.com/blog/weld-symbols-on-a-weldment-drawing/https://cncweldments.com/blog/weld-symbols-on-a-weldment-drawing/The parts of an AWS A2.4 weld symbol, what the arrow side and other side mean, and the five things buyers most often leave off a weldment drawing.Mon, 21 Sep 2026 00:00:00 GMTAWS D1.1, ISO 3834 and EN 1090 Explained for People Who Buy Weldmentshttps://cncweldments.com/blog/welding-codes-for-buyers/https://cncweldments.com/blog/welding-codes-for-buyers/What AWS D1.1, ISO 3834 and EN 1090 each cover, which one applies to your part and market, and what to ask a supplier to show you for each.Mon, 21 Sep 2026 00:00:00 GMTFit-Up Decides the Weldment, Not the Weldinghttps://cncweldments.com/blog/weldment-fixturing-and-fit-up/https://cncweldments.com/blog/weldment-fixturing-and-fit-up/Why fit-up and fixturing set the outcome of a large weldment, what modular and dedicated fixtures cost, and what a buyer should say about tacking and root gaps.Mon, 21 Sep 2026 00:00:00 GMTWhy a Machined Weldment Takes Ten Weeks and Not Threehttps://cncweldments.com/blog/weldment-lead-time/https://cncweldments.com/blog/weldment-lead-time/A realistic breakdown of machined weldment lead time: material, cutting, fit-up, welding, stress relief queues, machining, inspection and coating, and how to compress it.Mon, 21 Sep 2026 00:00:00 GMTA36, S355 or A514: What the Grade Does to Your Weldment Pricehttps://cncweldments.com/blog/weldment-material-selection-and-cost/https://cncweldments.com/blog/weldment-material-selection-and-cost/How structural steel grade changes welding, preheat, distortion and machining on a weldment, and when the higher strength plate is worth paying for.Mon, 21 Sep 2026 00:00:00 GMTChoosing Between a Weldment, a Casting and a Part Machined From Solidhttps://cncweldments.com/blog/weldment-vs-casting-vs-billet/https://cncweldments.com/blog/weldment-vs-casting-vs-billet/How size, quantity, tooling cost and lead time decide whether a structural part should be welded, cast or machined from solid, and where the break-even usually sits.Mon, 21 Sep 2026 00:00:00 GMTWhat a WPS Is, and Why You Should Ask to See Onehttps://cncweldments.com/blog/wps-pqr-and-welder-qualification/https://cncweldments.com/blog/wps-pqr-and-welder-qualification/The difference between a WPS, a PQR and a welder qualification record, what a qualification range covers and the three questions to ask a weldment supplier.Mon, 21 Sep 2026 00:00:00 GMT