ASTM A556 / A556M Standard Specification for Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes.
Grades:ASTM A556 Grade A2, Grade B2, Grade C2
Size:
Outside Diameter: 12-40mm
Wall Thickness: 1-4mm
Length: max length 27 meters
This 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 specification2 covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes including bending into the form of U-tubes, if specified, for use in tubular feedwater heaters.
1.2 The tubing sizes covered shall be 5/8 to 11/4-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 when desired, shall be stated in the order.
1.4 The values stated 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 stated 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.
|
Grade |
C max |
Mn |
P max |
S max |
|
A2 |
0.18 |
0.27-0.63 |
0.035 |
0.035 |
|
B2 |
0.27 |
0.29-0.93 |
0.030 |
0.030 |
|
C2 |
0.30 |
0.29-1.06 |
0.030 |
0.030 |
|
Grade |
Tensile Strength MPa min |
Yield Strength MPa min |
Elongation in 50mm % min |
|
A2 |
47 (320) |
26(180) |
35 |
|
B2 |
60(410) |
37(260) |
30 |
|
C2 |
70 (480) |
40 (280) |
30 |
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 | ||||||||||||||
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