ASTM A209 / ASME SA209 / Seamless Carbon Molybdenum Alloy Steel Boiler and Superheater Tubes supplier & distributor in India

ASTM A209M-88 / ASME SA 209

SEAMLESS CARBON MOLYBDENUM ALLOY STEEL BOILER

AND SUPERHEATER TUBES

This standard is issued under the fixed designation A 209/A 209M; 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 ( ε) indicates an editorial change since the last revision or reapproval.

Scope 1.

1.1 This specification covers several grades of minimun-wall-thickness, seamless, carbon-molybdenum alloy-steel, boiler and superheater tubes.

1.2 This specification covers tubes 1/2 to 5 in. [12.7 to 127mm] inclusive, in outside diameter and 0.035 to 0.500 in. [0.9 to 12.7 mm], inclusive, in minimum wall thickness.

1.3 An optional supplementary requirement is provided and, when desired, shall be so stated in the order.

1.4 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.

TABLE 1 Chemical Requirements

Element	Composition, %
Element	Grade T1	Grade T1a	Grade T1b
Carbon	0.10-0.20	0.15-0.25	0.14 max
Manganese	0.30-0.80	0.30-0.80	0.30-0.80
Phosphorus, max	0.025	0.025	0.025
Sulfur, max	0.025	0.025	0.025
Silicon	0.10-0.50	0.10-0.50	0.10-0.50
Molybdenum	0.44-0.65	0.44-0.65	0.44-0.65

TABLE 2 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
Less than 2 in. [50.8 mm] but over 1 in. [25.4 mm] in outside diameter or over 1 in. [25.4 mm] in outside diameter and under 0.200 in. [5.1 mm] in wall thickness	not more than 75 tubes
1 in. [25.4 mm] or less in outside diameter	not more than 125 tubes

TABLE 3 Tensile Requirements

-	Grade T1a	Grade T1b
Tensile strength, min, psi [MPa] Yield strength, min, psi[MPa] Elongation in 2 in. or 50 mm min, %: For longitudinal strip tests a deduction shall be made for each 1/32-in. [0.8-mm] decrease in wall thickness below 5/16 in. [8 mm] from the basic minimum elongation of the following percentage 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	53 [365]	60 [415]
	28 [195]	32 [220]
	30	30
	1.50A	1.50A
	22	22
AThe following table gives the computed minimum values:
Wall Thickness		Elongation in 2 in. 50 mm, min, %B
in.	mm	Elongation in 2 in. 50 mm, min, %B
5/16 (0.312)	8	30
9/32 (0.281)	7.2	29
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

Note-The above table gives the computed minimum eiongation values for each 1/32-in. [0.8 mm] decrease in wall thickness. Where the wall thickness lies between two vallues shown above. the minimum elongation value shall be detemined by the following equation: E = 48t = 15.00 [E= 1.87t = 15.00] where:
E = elongation in 2 in.or [50 mm] %, and,
t = actual thickness of specimen, in. [mm].
BCalculated elongation requirements shall be rounded to the nearest whole number.

TABLE 4 Hardness Requirements

-	Brinell Hardness Number (Tubes 0.200 in. [5.1 mm] and over in Wall Thickness)	Rockwell Hardness Number (Tubes less than 0.200 in. [5.1mm] in Wall Thickness)
Grade T1	146	B80
Grade T1a	153	B81
Grade T1b	137	B77

Material Comparison Tables (ASTM →KS, JIS, DIN, BS, NBN, NF, UNI)

ASTMSTANDARD

UNS NO.

KOREA/JAPANES

GERMAN

BRITISH

FRENCH

ITALIAN

KS/JIS Symbol

KS/JIS Numbe

Remarks

DIN Type

DIN

Number

Materiral

Number

Remarks

B.S

Number

B.S Grade

Remarks

AFNOR Type

NF Number

Ramarks

UNI Type

UNI Number

Ramarks

A 209

Seamless C-Mo Steel Boiler and Superheater Tubes

Grade T 1

K11522

STHA 12 / STBA 12

D3572 / G3462

(30)(24)

16 Mo 5

1.5423

(3a)

18 MD 4.05

(3a)

16 Mo5

5462

(37)

Grade T 1a

K12023

STHA 13 /STBA 13

D3572 / G3462

(30)(24)

16 Mo 5

1.5423

(3a)

(3)

Product successfully added to your shopping cart

There are 64 items in your cart. There is 1 item in your cart.

Categories

Surplus stock of Steel Pipes & Tubes:

Specialist in:

Offering best price on:

Widest inventory of:

ASTM A209 / ASME SA209 / Seamless Carbon Molybdenum Alloy Steel Boiler and Superheater Tubes supplier & distributor in India

Steel pipe & tube ready inventory: