This is from a great little book titled "twenty small boats to take you anywhere" by John Vigor
The Westsail 32
is a very capable double ended blue water boat with a full keel, transom hung rudder displacement of 20,000lbs and 7,000 lbs ballast designed as: Roomy rugged world cruiser LOA: 32' LWL: 27'6" Beam: 11'
Southern Cross 31
Tom Gillmer designed (1976)
LOA 31 ft LWL:25ft Beam: 9'6" draft: 4'7" displacement 13,600lbs ballast 4,400lbs
designed as: Conservative bluewater cruiser (also double ended)
Nicholson 31
Designer: Camper&Nicholson
LOA: 30'7" LWL: 24'2" Beam:10'3" Draft: 5' Displacemnt 14,750 ballast: 5300
None were made of steel but I hink you should drop that requirement, it's not a good idea

Oded Kishony ~~__/) ~~