INSIGHTS
Straight answers on castings, sourcing, and what happens after the PO.
How Ductile Iron Is Made: The Magnesium Treatment and Why It Matters to Your Parts
One ladle treatment turns brittle iron into a metal that bends. It is also the step that most often goes wrong. What buyers should know about the practice behind the grade.
Read the article →
Sand Casting, Explained for the Buyer
How the oldest casting process works, why it still carries most of the industrial world, and what it means for your print, your tooling, and your lead time.
Read the article →
Ductile Iron Castings: Why Buyers Move Parts Off Steel
The case buyers make for ductile iron on parts that used to be steel weldments or forgings — and the questions to settle before the print changes.
Read the article →
How to Choose a Casting Partner — Not Just a Foundry
Every foundry company will tell you about its furnace. The questions that predict how the next three years go are about what happens after the purchase order.
Read the article →
Iron Castings Explained: Grey, Ductile, and What the Grade on Your Print Means
Class 30, 65-45-12, alloyed iron — a working guide to the iron casting grades buyers see on prints, and what each one is asking the foundry to do.
Read the article →
What Sets a Good Iron Foundry Apart — and How GW Qualifies One
Thousands of iron foundries operate worldwide. Only a few earn a place in GW's network. This is the difference we look for — and the audit that finds it.
Read the article →
Inside a Metal Casting Foundry: What We Look at on the Floor
A walk through a metal casting foundry the way GW walks it on an audit — from the scrap yard to the shipping dock, and the eight places where your part is won or lost.
Read the article →
What a Metal Casting Foundry Does — and What It Doesn't
A foundry turns molten metal into a raw casting. Between that casting and a part on your line sit five other vendors — unless someone manages them for you.
Read the article →
Industrial Machine Castings: Bases, Frames, and Housings That Stay True
The machine is only as good as the foundation it is built on. What buyers of machine castings need from the foundry, the machine shop, and whoever sits between them.
Read the article →
The Modern Iron Foundry: What Has Changed Since We Ran One
GW operated its own iron foundries until 2011. Here is what a good foundry does differently today — and what has not changed at all.
Read the article →
Domestic or Offshore Metal Foundry? How the Decision Actually Gets Made
The domestic-versus-international question is not a philosophy. It is a part-by-part calculation with six inputs. Here they are.
Read the article →
Resourcing a Casting When Your Foundry Fails
Missed deliveries, quality drift, unreturned calls, a closure notice — the four ways a metal casting foundry fails a buyer, and how to move the part without a line-down.
Read the article →
Ductile Iron Grades: What 65-45-12 Means on Your Print
The three numbers in a ductile iron grade, the four grades buyers see most, and what each one tells the foundry to do with the melt.
Read the article →