OVERLAY

T157

T157 is an iron-based steel overlay wear solution with a unique proprietary chemical composition designed to withstand heavy wear environments exposed to mild-moderate direct impact.

T157 is the top-performing chromium carbide wear plate on the market. It has a smooth surface, like T138 and T156 overlays, plus extra Chromium and Manganese gives T157 up to 30% more wear resistance than the T156.

Application Process

Sub Arc Bulk Welding

Wear Resistance

ASTM G65-04 Procedure A 6,000 cycles mass loss

Substrate Materials

44W (or 300W) steel
Stainless steel
516 Grade 70 for pressure applications
HRc 56 – 58

Overlay Thickness

Standard (single pass): 5/16” or 8 mm Maximum: 11/16” or 17

Overlay Attributes

T157 consistently rates between 56 – 58 HRc for hardness, and only loses 0.13 g (+/-0.03) on ASTM G65-04 Procedure A mass loss test. T157 has a slick drag coefficient of 0.185 to deter material buildup, and it lasts up to 30% longer than Trimay’s® T156.

Common Application

T157 is Trimay’s® premium Chromium Carbide alloy and has virtually no competition in the market place. It acheives excellent wear life in highly abrasive environments and exhibits high impact resistance.

Production and Installation

As a wear solution, T157 can be applied on most types of steel.

T157 wear plate 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, T157 overlay material can be removed by means of carbon arc gouging. These overlays are non-ma- chinable and, if necessary, surface finishing can be done by grinding.

T157 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 or TWP61w wire to ensure even wear on the plate and weld seam.