IronWrought IronPuddle Iron

Properties:Puddle Iron is a type of wrought iron that was developed in the 18th

century, and was used mainly in construction due to it’s tensile strength. The name is from the process in which it is made, by using what is called a pud-dling furnace. The process results with a higher carbon content, resulting in a higher tensile strength than the more basic wrought irons. Bridges, the Statue of Liberty, and the Eiffel Tower were all built with puddle iron. The puddled iron process made a significant contribution to the industrial revo-lution.

Strengths:• Greater tensile strength• Lent itself to use in great spanning structures• Cheaper method than charcoal ironWeaknesses:• Soft• Highly corrosive

Applications of Material• Architecture• Bridges

Grades:• Grade A (can be bent completely without signs of fracture)• Grade B• Grade C• Grade D (for fencing, can be bent at 90 degrees without signs of frac-

ture)

Related Materials:Charcoal Iron

References:1. http://www.buildingconservation.com/articles/antiquewrought/

antiquewrought.htm2. http://www.wrought-iron-crafts.com/puddled-iron.html 3. http://en.wikipedia.org/wiki/Puddle_iron 4. http://corrosion-doctors.org/Corrosion-History/Puddled.htm 5. http://www.britannica.com/EBchecked/topic/482700/puddling-process 6. Brady, George S, Henry R. Clauser, and John A. Vaccari. Materials

Handbook Fourteenth Edition. McGraw-Hill: 1997.7. Oberg, Erik, Franklin D. Jones, Holbrook L. Horton, and Henry H. Ryffell

Machinery's Handbook 26th Edition. Industrial Press Inc: 2000.