Super Duplex Stainless Steel
发布时间：[2016-03-11]

GDVAL produced the super duplex stainless steel A995 6A gate, globe, ball, plug valves, F55 forging gate, globe, swing check valves.

To control raw material, GDVAL does test and analysis as below:

(A)Chemical/Mechanical Analysis /A/W ASTM A182 Gr. F55 or A995 6A

(B)Hardness Test /A/W NACE MR 175

(C)Metallograph Examination I/A/W ASME E562

(D)PMI I/A/W ASTM A182 Gr. F55 or A995 6A

(E) Corrosion Test I/A/W ASTM G48 Method A

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