Electric-Resistance-Welded Carbon Steel Tube A210 Grade A-1

Product info

Supplier:	Tapgroup internation.,JSC
Address:	Số 32 Lô N4D, đường X2A, Yên Sở, Hoàng Mai, Hà Nội
Phone:	0084 933 86 77 86
Email:	info@tapgroup.vn
Website:	https://supplier-pipe-tube-ongthep.com
Insurance:	12 tháng
Status:	Mới 100%
Origin:	China, Korea, Malaysia, Thailand, Japan, EU, G7

Catalogue Profile

Description

Name:		Electric-Resistance-Welded Carbon Steel Tube A210 Grade A-1
Type Of tube		Electric-Resistance-Welded Carbon Steel and Carbon Manganese Steel Boiler and Superheater Tube A210 Grade A-1
		Electric Resistance Welded Tube, A210 Grade A-1			Tube, A210 Grade A-1, ERW
Standard Specification for Electric-Resistance-Welded Carbon Steel and Carbon Manganese Steel Boiler and Superheater Tubes This standard is issued under the fixed designation A 210/A 210M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.




Scope
This specification covers minimum-wall-thickness, seamless medium-carbon steel, boiler tubes and boiler flues, including safe ends, arch and stay tubes, and superheater tubes. NOTE 1—This type is not suitable for safe ending by forge welding. The tubing sizes and thicknesses usually furnished to this specification are 1⁄2 in. to 5 in. [12.7 to 127 mm] in outside diameter and 0.035 to 0.500 in. [0.9 to 12.7 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification. Mechanical property requirements do not apply to tubing smaller than 1⁄8 in. [3.2 mm] in inside diameter or 0.015 in. [0.4 mm] in thickness. The values stated in either inch-pound units or SI units are to be regarded separately as 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.







Manufacture
Steelmaking Practice—The steel shall be killed. The tubes shall be made by the seamless process and shall be either hot-finished or cold-finished, as specified.

Heat Treatment
Hot-finished tubes need not be heat treated. Coldfinished tubes shall be given a subcritical anneal, a full anneal,or a normalizing heat treatment after the final cold finishing process.
Chemical Requirements
Composition, %
Element	Grade A-1			Grade C
Cacbon^A max	0.27			0.35
Manganese	0.93 max			0.29-1.06
Phosphorus, max	0.035			0.04
Sulfur, max	0.035			0.04
Silicon, min	0.10			0.10
^AFor each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a maximum of 1.35 %.
The steel shall conform to the requirements as to chemical composition prescribe. When a grade is ordered under this specification, supplying an alloy grade that specifically requires the addition of any element other than those listed for the ordered grade in is not permitted.


Tensile requirements
			Grade A-1		Grade C
Tensile strength, min., ksi [MPa]			60 [415]		70 [485]
Yield strength, min., ksi [MPa]			37 [255]		40 [275]
Elongation in 2 in., or 50 mm, min., %			30		30
For longitudinal strip tests, a deduction shall be made for each 1⁄32-in. [0.8-mm] decrease in wall thickness under 5⁄16in. [8 mm] from the basic minimum elongation of the following percentage points			1.50^A		1.50^A


When standard round 2-in. or 50-mm gage length or smaller proportionally sized specimen with the gage length equal to 4D (four times the diameter) is used			22		20

^ASee Computed Minimum Elongation Values
The material shall conform to the requirements as to tensile properties prescribed. This table gives the computed minimum elongation values for each 1⁄32-in. [0.8-mm] decrease in wall thickness. Where the wall thickness lies between two values shown above, the minimum elongation value shall be determined by the following equation:


Hardness Requirements
The tubes shall have a hardness not exceeding the following: 79 HRB or 143 HB for Grade A-1, 89 HRB or 179 HB for Grade C.
Mechanical Tests Required
Tension Test—One tension test shall be made on a specimen for lots of not more than 50 tubes. Tension tests shall be made on specimens from two tubes for lots of more than 50 tubes. Flattening Test—One flattening test shall be made on specimens from each end of one finished tube from each lot, but not the one used for the flaring test. Tears or breaks occurring at the 12 or 6 o’clock positions on Grade C tubing with sizes of 2.375 in. [60.3 mm] in outside diameter and smaller shall not be considered a basis for rejection. Flaring Test—One flaring test shall be made on specimens from each end of the one finished tube from each lot, but not the one used for the flattening test. Hardness Test—Brinell or Rockwell hardness tests shall be made on specimens from two tubes from each lot. Hydrostatic or Nondestructive Electric Test—Each tube shall be subjected to the hydrostatic, or, instead of this test, a nondestructive electric test may be used when specified by the purchaser.







Computed Minimum Elongation Values
Wall Thickness, in. [mm]				Elongation in 2 in. or 50mm, min, %^A
⁵⁄₁₆ (0.312) [8]				30
⁹⁄₃₂ (0.281) [7.2]				28
¹⁄₄ (0.250) [6.4]				27
⁷⁄₃₂ (0.219) [5.6]				26
³⁄₁₆ (0.188) [4.8]				24
⁵⁄₃₂ (0.156) [4]				22
¹⁄₈ (0.125) [3.2]				21
³⁄₃₂ (0.094) [2.4]				20
¹⁄₁₆ (0.062) [1.6]				18
0.062 to 0.035 [1.6 to 0.9], excl				17
0.035 to 0.022 [0.9 to 0.6], excl				16
0.022 to 0.015 [0.6 to 0.4], incl				16
^ACalculated elongation requirements shall be rounded to the nearest whole number
E = 48t + 15.00 [E = 1.87t 1 15.00]
where:
E = elongation in 2 in. or 50 mm, %, and
t = actual thickness of specimen, in. [mm]
Number of Tubes in a Lot Heat Treated by the Continuous Process
Size of Tube			Size of Lot
2 in. (50.8 mm) and over in outside diameter and 0.200 in. (5.1 mm) and over in wall thickness			not more than 50 tubes

2 in. (50.8 mm) and over in outside diameter and under 0.200 in. (5.1 mm) in wall thickness			not more than 75 tubes

Less than 2 in. (50.8 mm) but over 1 in. (25.4mm) in outside diameter			not more than 75 tubes
1 in. (25.4 mm) or less in outside diameter			not more than 125 tubes

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