ASME

Spec.

ASME

Grade Description Typical uses

SA-178 A Low carbon steel - C=0.18 max.

Boiler tubes, economizers, low temp.

superheaters

SA-178 C Medium carbon steel - C=0.35 max.

Boiler tubes, economizers, low temp.

superheaters

SA-178 D Carbon-manganese steel - C=0.27 max Not in common use

SA-192 Low carbon steel - C=0.18 max

Waterwalls, economizers, low temp.

superheaters

SA-210 A1 Medium carbon steel - C=0.27 max. Waterwalls, economizers, superheaters

SA-210 C Medium carbon steel - C=0.35 max. Waterwalls, economizers, superheaters

SA-209 T1 Low alloy steel - low carbon, 1/2% moly Superheaters

SA-209 T1a

Low alloy steel - medium carbon, 1/2%

moly Superheaters

SA-209 T1b Low alloy steel - low carbon, 1/2% moly Superheaters

SA-213 T2

Intermediate alloy - 1/2% chrome, 1/2%

moly

Waterwalls, superheaters, not in common

use

SA-213 T11

Intermediate alloy - 1 1/4% chrome, 1/2%

moly Waterwalls, superheaters

SA-213 T22

Intermediate alloy - 2 1/4% chrome, 1%

moly Waterwalls, superheaters

SA-213 T5

Intermediate alloy - 5% chrome, 1/2%

moly

High temperature superheaters, not in

common use

SA-213 T9 Intermediate alloy - 9% chrome, 1% moly

High temperature superheaters, no

longer in common use

SA-213 T91

Intermediate alloy - 9% chrome, 1% moly,

1/4% vanadium

High temperature superheaters - the

latest and greatest

SA-213 Tp-304 Stainless steel - 18% chrome, 8% nickel Superheaters

SA-213 Tp-304H

Stainless steel for high temperature

service High temperature superheaters

SA-213 Tp-316 Stainless steel - 16% chrome, 11% nickel Superheaters

SA-213 Tp-316H

Stainless steel for high temperature

service High temperature superheaters

SA-213 Tp-321

Stainless steel - 17% chrome, 9% nickel,

0.60% titanium Superheaters

SA-213 Tp-321H

Stainless steel for high temperature

service High temperature superheaters

SA-213 Tp-347

Stainless steel - 17% chrome, 9% nickel,

columbium + tantalum=1.00% max. Superheaters

SA-213 Tp-347H

Stainless steel for high temperature

service High temperature superheaters

Common Tubing Specifications