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OVERLAY
T156
T156 is an iron-based steel overlay wear solution with a unique proprietary chemical composition designed for moderate wear environments with moderate impact
T156 is similar to Trimay’s® T138 with its smooth surface and chemical make-up; however, extra Chromium and Molybdenum makes T156 more resistant to wear than the T138.
Overlay Attributes
T156 consistently rates between 54 – 56 HRc for hardness, and only loses 0.16 g (+/-0.03) on ASTM G65-04 Procedure A mass loss test. Just like all other Trimay® overlays, T156 has a low drag coeffi cient of 0.185 to deter material build up.
The coal-crushing trunion below is lined with T156.
T156 is often used to make durable drilling augers.
Application Process
Sub Arc Bulk Welding
Wear Resistance
TM G65-04 Procedure
A
6,000 cycles mass loss
0.16g (+/- 0.03)
Substrate Materials
44W (or 300W) steel
Stainless steel
516 Grade 70 for pressure
Rockwell C (HRc) Hardness
HRc 54 – 56
Overlay Thickness
Standard (single pass):
1/4” or 6 mm
Maximum: 11/16” or 17 mm
Common Application
T156 is used primarily in medium to high abrasion environments. It is formable to 10” radius. T156 is similar to competitor’s premium products but with generally better alloy distribution, optimum carbide formation and minimum dilution zone resulting in longer wear life.
Production and Installation
T156 wear overlay is applied using Trimay’s® proprietary Submerged Arc Bulk Overlay Welding Process and can be cut and fabricated to specification. It can be rolled or formed by press brake and cut via plasma arc or water jet. It cannot be flame cut. Formability is dependant only on thickness and whether weld position is on the inner or outer diameter. For applications requiring less precision, T156 overlay material can be removed by means of carbon arc gouging. These overlays are non-machinable and, if necessary, surface finishing can be done by grinding or E. D. M. T156 wear plate can be installed by plug or fillet welding, bolted or fabricated with inserts for installation. Any weld seams should be overlaid with Trimay’s® TWP57w wire to ensure even wear on the plate and weld seam.
