This is a subprime grade of steel.

这个不锈钢产品属于次等级别。

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In this paper, the internal transverse cracks of continuous casting slabs of a niobium bearing peritectic grade of steel are investigated using electron probe microanalyser and optical microscope.

连铸坯厚度中心存在的内裂纹在后续的轧制过程中轧不合而对产品的质量带来重大的影响。

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The results indicate that HAZ produced during welding of grade X80 steel is made up of grads structure under different temperature.

结果表明，X80级管线钢在焊接过程中形成的热影响区由不同温度下形成的梯度组织组成。

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Instead of being produced from all high-grade steel, most of The Guardian is produced in mostly forms of carbon fiber and thick polycarbonate as well as some steel.

FORBES: Connect

Every ton of high-grade yields six hundred kilos of steel.

NEWYORKER: The Miner��s Daughter

Coking coal is high grade coal used in the production of steel.

BBC: Rio Tinto raises bid for Australia's Riversdale