INTERNAL QUALITY
The reduced sulfur level in Fineline� steels not only results in fewer inclusions for improved microcleanliness, but, also, due to calcium treatment, the remaining inclusions resist elongation during the plate rolling operation and tend to remain spherical. This is shown in the photomicrographs in Figure 2 below, taken at the approximate mid-gauge of the plates. This "shape control" contributes to the improved ultrasonic quality, macrocleanliness and mechanical properties of Fineline steels.
Figure 2
Ultrasonic Testing
Ultrasonic examination permits 100% volumetric inspection of steel plate. Fineline plates up to 6" thick, and thicker plates, depending on total pattern weight, can be ordered to meet restrictive ASTM A578 Level III acceptance criteria. If more-restrictive requirements are desired, please inquire with Bethlehem.
Microcleanliness
Metallographic evaluation can be used to quantify the cleanliness of Fineline steels. Please consult a representative at Bethlehem about your specific acceptance level criteria, if applicable.
	Bethlehem's Spartan� plate steel, a product of the Fineline process, is often specified for construction and mining equipment because it combines high strength and toughness in all three testing orientations with good weldability in the field as well as in the shop.
Bethlehem's Hardwear�  premium abrasion-resistant plate steels, typically used in high wear areas of bulk materials handling equipment in the mining and construction industries, possess a combination of hardness and excellent formability.

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