KT Metal Castings Blogs

“We often don’t understand a customer’s design intent for a part.” That observation from Jeff Taylor, a casting engineer at C.A. Lawton Co., captures the single biggest problem in counterweight casting orders. Engineers specify every dimension, every surface finish, every bolt hole location — but almost never specify the one…

When a purchasing spec says “ductile iron flywheel,” the foundry decides your flywheel’s performance. Per ASTM A536, that could mean 60 ksi tensile with 18% elongation — or 120 ksi with 2%. The range within a single material family is wider than the difference between material families themselves. The typical…

Sand cast motor housings can hold CT8-CT10 on as-cast features and H7 on machined bearing bores — but only when you specify the right tolerance class for each surface. The mistake I see most often is treating every dimension the same. A motor housing has three or four surfaces that…

CF8M — the cast equivalent of 316 stainless steel — carries a Pitting Resistance Equivalent Number (PREN) of roughly 25. The industry-accepted threshold for seawater corrosion resistance is 32. That seven-point gap explains why materials engineers on Eng-Tips have reported perforation of 316L castings in seawater within weeks, not years.…

Nineteen white iron mill liners, each manufactured to ASTM A532 specifications, fractured within hours of installation at a mining operation. Every liner passed chemistry, hardness, and NDT inspection. The root cause had nothing to do with casting quality — improper mill shell alignment created bending stresses the liners were never…

As older design engineers retire, a new generation inherits their projects — but not always their casting knowledge. Counterweights and housings rank among the most frequently specified sand-cast components for excavators, loaders, and cranes, yet engineers often treat them as the same type of casting job. They are not. A…

Why do wear-resistant parts account for over 50% of agricultural machinery breakdowns? According to a 2023 peer-reviewed study published in MDPI’s Materials journal, the failure of critical wear-resistant components is the single largest cause of rural machinery downtime. Combine harvesters operate trouble-free for only 20 to 30 hours before something…

Custom sand casting moves through five distinct stages: design review, tooling, first article production, validation, and production ramp-up. Each stage has specific deliverables, timelines, and decisions that determine whether your project succeeds or stalls. Knowing this workflow before engaging a foundry prevents the costly surprises that drive some buyers to…

Sixty percent of companies make sourcing decisions based on price instead of total cost of ownership. That single statistic explains why the “30-50% savings” claim for China casting suppliers persists despite evidence that real savings are often half that figure. From a sourcing perspective, the math gets uncomfortable when you…

A 2024 HICX survey found that 98% of global suppliers identify communication quality as their primary area for improvement. They know it’s their weakness. Yet most foundry selection guides focus almost entirely on certifications and equipment lists. Selecting a casting foundry essentially entrusts your entire production to them. Custom patterns…