When RDSO writes a material specification for a CASNUB bogie side frame or bolster, it does not say “steel casting.” It says alloy steel casting — with specific minimum requirements […]
No-Bake Sand Casting for Railway Bogies — Why Dimensional Accuracy Determines Quality
Most foundries can produce a casting that looks like a bogie. Fewer can produce a bogie casting that holds the tolerances that the RDSO drawing requires — dimension after dimension, […]
Why Electric Arc Furnace Steel Makes Better Railway Bogies Than Induction Furnace Steel
When a procurement specification says “alloy steel cast bogie to RDSO drawing,” it does not specify how that steel was made. Most buyers accept any quoted RDSO-grade casting without asking […]