Grain Oriented Electrical Steel (GOES)

Grain Oriented Electrical Steel (GOES)

Arnold Magnetic Technologies’ thin Grain Oriented Electrical Steel (GOES) is 3% silicon steel which is processed under carefully controlled conditions. Arnold produces GOES from several different grades of Silicon steel all of which are produced in the USA and are DFARS compliant. This steel is purchased in a “pickled” condition which allows Arnold to roll it to very thin gauges. Once it has been rolled and undergone further processing the material receives an insulating coating, which keeps eddy current losses to a minimum.

Arnold produces GOES in thicknesses of 0.001″ (0.025mm), 0.002″ (0.05mm), 0.004″ (0.10mm) and 0.006″ (0.15mm) and provides slit widths from 0.02″ (5.08mm) to 17.0″ (431.8mm), depending on gauge.

Our grain oriented silicon steel material meets IEC 60404-8-8.

Arnold GOES thin gauge strip can be shipped bare or with an inorganic coating, capable of surviving 920°C annealing temperature (C-5 IEEE class).

GOES Applications

Arnold’s GOES materials are typically used in power, instrument and current transformers, as well as cores for High-voltage direct current (HVDC) transmission systems. Arnold’s GOES materials are commonly produced in 0.006″ (0.15mm) and 0.004″ (0.10mm) thicknesses for frequencies below 1 KHz, and 0.001″ (0.025mm) and 0.002″ (0.05mm) for higher frequencies.

For higher frequency applications, using thinner materials reduces the negative effects of core losses due to eddy currents. By keeping core loss to a minimum, heat build-up is minimised.

Arnold’s GOES is available in the following gauges and dimensions:

GaugeSlit Width MinimumSlit Width Maximum
0.001" (0.025mm) 0.002" (0.05mm) 0.004" (0.10mm)0.20" (5.08 mm)All gauges: 17.0" (431.8 mm) as rolled 16.5" (419.1 mm) with a slit edge
0.006" (0.15mm)0.20" (5.08 mm)17.5" (444.5mm) as rolled 17.0" (431.8mm) with a slit edge

Learn More: GOES & NGOES – Controlling Internal Structure and Why it Matters

Specification Sheets

1 Mil
1 Mil Grain Oriented Silicon Steel Hysteresis Curve at 400Hz
1 Mil Grain Oriented Silicon Steel Hysteresis Curve at 800Hz
1 Mil Grain Oriented Silicon Steel Hysteresis Curve at 2000Hz
1 Mil Grain Oriented Silicon Steel Hysteresis Curve at 5000Hz

The Arnold advantage for service and support

We back up our Silicon Steels and other precision thin materials with extensive in-house lab and testing facilities that help our customers to get peak performance at a favourable cost. For service before and after the sale, the Arnold Precision Thin Metals team helps customers to verify the performance of materials and coatings under various ambient conditions and frequencies. Arnold’s advanced materials lab capabilities also allow us to test and assess mechanical characteristics to determine how the product is handled, stamped and cut. Our unequalled technical know-how and support helps our customers to get the best in manufacturing and field performance from thin-rolled Silicon Steels, silicon steel sheet and other rolled metal products.

Arnold’s PTM business offers precision rolled Silicon Steels in a variety of thicknesses and orientations geared to standard applications. Silicon Steels from Arnold are available with or without standard C5 insulating coating and offer a choice of coatings chemistries for optimised performance.

Contact the PTM team to discuss your needs.

Measuring in Microns?

Check out the Material Thickness Reference Table

Want to learn more about Si-Fe?

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