ASTM A556/A556M

ASTM A556 Standard Specification for Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes.

ASTM A556 Superheater Steel Tube

ASTM A556 specification covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes including bending into the form of U-tubes for use in tubular feedwater heaters. Mechanical tests shall be made on specimens including: tension test; flattening test; flaring test; hardness test; and hydrostatic test. Each tube shall be tested after the finish heat treatment following the final cold-drawn pass by passing through a nondestructive tester capable of detecting defects on the entire cross section of the tube.

Scope

1.1 This specification covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes including bending into the from of u-tubes, if specified, for use in tubular feedwater heaters.

1.2 The tubing sizes covered shall be 5/8 to 1 2/4-in. [15.9 to 31.8-mm] outside diameter, inclusive, with minimum wall thicknesses equal to or greater than 0.045 in. [1.1 mm].

1.3 optional supplementary requirements are provided, and hen desired, shall be stated in the order.

1.4 The values stared in either inch-pound units or SI units are to be regarded separately as the standard. within the text, the SI units are shown in brackets. The values sated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

Chemical Components (%) of ASTM A556

Grade C % Si % Mn % P % S %
A2 0.18 ... 0.27–0.63 0.035 0.035
B2 0.27 max 0.10 min 0.29-0.93 0.030 max 0.030 max
C2 0.30 max 0.10 min 0.29-1.06 0.030 max 0.030 max

All Mechanical Properties Tensile Requirements and Hardness of ASTM A556

Grade Tensile strength, min, ksi [MPa] Yield strength, min, ksi [MPa] Elongation in 2 in. or 50 mm, min, % (longitudinal) Hardness Requirements
A2 47 [320] 26 [180] 35 HR B 72
B2 60 [410] 37 [260] 30 HR B 79
C2 70 [480] 40 [280] 30 HR B 89

Tolerances:

Tolerances according to specification or according to agreement. Standard tolerances are:

Processing methods OD WT
Hot finished +/- 1% +/-12.5%
Cold finished +/-0.75% +/-10%

JIS Number and Corrensponding Foreign Standards

Tolerances according to specification or according to agreement. Standard tolerances are:

JIS ASTM BS DIN NF ISO Index Number
Standard Number Grade Tupe Standard Number Grade Tupe Standard Number Grade Tupe Standard Number Grade Tupe Standard Number Grade Tupe Standard Number Grade Tupe
G3461 STB340 C A161 LC C 3059 HFS320 C A49-245 TS34e C C010
(STB35) A192 - C " CFS320 C " TS34c C
A226 - C " ERW320 C
A556 GrA2 C " CEW320 C
A557 GrA2 C " S1 360 C
" S2 360 C
" ERW 360 C
" CEW360 C
3606 ERW320 C
" CEW320 C
" CFS320 C
STB410 C A179 GrC C 3059 S1 440 C 17175 St45.8 C A49-213 TU42c C 2604/2 TS9H C
(STB42) A210 GrA1 C " S2 440 C 17177 St42.8 C A49-215 TU42c C " TW9H C
A556 GrB2 C " ERW 440 C A49-243 TS42c
A557 GrB2 C " CEW 440 C A49-245 TS42c
3602 HFS 410 C " TS42c
" CFS 410 C
" ERW 410 C
" CEW 410 C
3606 ERW 440 C
" CEW 440 C
" CFS 440 C
STB510 C C 17175 19Mn5 C A49-213 TU52C C 2604/2 TS18 C
(STB52) C A49-248 TU52C C

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.

Ni-Hard Wearback Pipes Ni-Hard Wearback Pipes
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