BethStar 60

BethStar 60 plate has 60 ksi minimum yield strength and is available through 11/4 in. thickness. It combines attractive strength/cost ratio with outstanding toughness, formability and weldability. It may be ordered to ASTM A656, Type 7 specification.

BethStar 60 provides the design engineer with a new option in an economical HSLA grade that is readily fabricated. Potential applications include weight-sensitive components subject to high stress, such as frames for large off-highway haulers.

Metallography

The microstructure of BethStar 60 displays a uniformly fine grain structure which is essentially a combination of ferrite and pearlite with an ASTM ferrite grain size of 10 or finer. In general, the ferrite grain size increases with plate thickness, but overall is quite consistent with a range of only one ASTM number.

However, as the plate thickness increases, there is deformation into the two-phase region, which produces elongated and deformed ferrite grains.

Welding Suggestions

Like all of the BethStar family, BethStar 60 is readily weldable and requires no preheat for temperatures above 0�F, provided low-hydrogen conditions can be maintained. When base metal temperature is below 32�F, the plate should be preheated to remove any moisture.

Representative Mechanical Properties*

*Based on production tests of over 40 plates.

Consumables:

Manual-Shielded Metal-Arc Welding. Any low-hydrogen (EXXX15, 16 or 18) electrode of the E 80 strength level or above.

Submerged Arc Welding. Many electrodes falling under the general classification F10X-EXXX will provide welds with adequate strength. More detailed specifications are necessary if impact properties are required.

Gas Metal-Arc Welding. An electrode meeting AWS specification ER80S-1 will provide strength and toughness sufficient for this grade.

Flux-Cored Arc Welding. An electrode meeting AWS A5.29 specification E7XT-X, except -2, -3, -10 or -GS, will provide adequate strength and toughness for this grade.

Procedural Testing:

For production application where strength and toughness are critical, weld procedural tests should be made to simulate actual joints.

	Figure 11 Representative microstructure of BethStar 60 plates at an original magnification of 200X - 1 in.

Longitudinal and transverse full curve Charpy impact data for 1/2in. BethStar 60 Plate.

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BethStar Steel Plate BethStar Characteristics BethStar 50 (page1) BethStar 50 (page 2)
BethStar 60 BethStar 70 BethStar 80 (page1) BethStar 80 (page 2)

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