Stainless Steel For Sulfuric Acid Systems

Pipe Standard: ASTM A312, ASTM A790 Plate Standard: ASTM A240 Grade: 304, 304L, 316, 316L, 310, 904L,

6%Mo (UNS S31254, N08367, N08926), 7%Mo (S32654), 4%Si(S30600), 5%Si(S30601, S32615), S6%(S38815),

2205 (S32205), 2550 (S32550), 7-Mo Plus (S32950)

Stainless Steel Pipes, Tubes, Plates and Sheets for Sulfuric Acid Systems

Type: Pipes, Plates

Pipe Standard: ASTM A312, ASTM A790

Plate Standard: ASTM A240

Grade: 304, 304L, 316, 316L, 310, 904L, 6%Mo (UNS S31254, N08367, N08926), 7%Mo (S32654),

4%Si(S30600), 5%Si(S30601, S32615), S6%(S38815), 2205 (S32205), 2550 (S32550),

7-Mo Plus (S32950)

Pipe Size: NPS 1/2" - 56"

Pipe Thickness: SCH 5S, 10S, 40S, 80S

Plate Dimension: Width 1000 - 4000mm x Length 1000 - 12000mm x Thickness 3 - 80mm

a - UNS numbers beginning with an “N” indicate a nickel alloy, but the definition of a nickel alloy is different

than that used by ASTM.

b - in ASTM specifications, most nickel alloys fall into the “B” specifications. However, due to a redefinition of

a nickel alloy, a few alloys such as 800 and 20 are being reclassified as stainless steels and will be included in

the “A” specifications. That work is still in progress.

c - the 6%Mo alloys are a series of stainless steels, many of which are proprietary, all with roughly 6%Mo

content and roughly equivalent in performance.

d - the austenitic stainless steels with high Si are proprietary and were developed from nitric acid grades for

use in strong sulphuric acid.