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ASTM A688 tube

ASTM A688 TP304L seamless tube manufacturer in India

ASTM A688 tube

ASTM A688 seamless tube and stainless steel feedwater heater tubes supplier in Asia

ASTM A688 welded tube

ASTM A688 welded tube

ASTM A688 TP304L bright tube

ASTM A688 TP304L bright tube

ASTM A688 seamless tube

ASTM A688 seamless tube

Exporter of ASTM A688 welded tube in India, view A688 TP316LN boiler tubes standard dimensions and price list

Specifications of ASTM A688 TP304L tube

 

 

 

 

 

 

 

 

 

 

 

ASTM A688 tube specification
ASTM A688 Grade TP304LN material manufacturer in Gujarat, view A688M coil tubing stock & sizes

ASTM A688 tube types

ASTM A688 welded tube

ASTM A688 welded tube

A688 stainless steel feedwater heater tubes

A688 stainless steel feedwater heater tubes

A688 u-tubes

A688 u-tubes

ASTM A688 TP316LN boiler tubes

ASTM A688 TP316LN boiler tubes

ASTM A688 grade TP304LN material

ASTM A688 grade TP304LN material

ASTM A688m coil tubing

ASTM A688M coil tubing

ASTM A688 TP316N heater tubes

ASTM A688 TP316N heater tubes

ASTM A688 Class D condenser tube

ASTM A688 Class D condenser tube

A688 Class K bright annealed tubes

A688 Class K bright annealed tubes

A688 Class F heat exchanger tubes

A688 Class F heat exchanger tubes

ASTM A688 Class C cold drawn seamless tube

ASTM A688 Class C cold drawn seamless tube

A688 Class B anneled tubing

A688 Class B anneled tubing

Supplier of ASTM A688 TP316N heater tubes and A688 Class D material in various grades

A688 stainless steel feedwater heater tubes equivalent

GRADE DIN/WERKSTOFF UNS NO
ASTM A688 304 1.4301 S30400
A688 304H S30409
ASTM A688 304L 1.4306 S30403
A688 310S 1.4845 S31008
ASTM A688 316S 1.4436 S31600
A688 316H S31609
ASTM A688 316 TI 1.4571 S31635
A688 316L (2.5 MIN MOLY) 1.4435 S31603
ASTM A688 316L 1.4404 S31603
A688 317L 1.4438 S31703
ASTM A688 321 1.4541 S32100
A688 321H S32109
ASTM A688 347 1.4550 S34700

 

Element Classes G to N and GH to NH Classes A to F and AH to FH
Manganese % maximum - 1.35
Phosphorous % maximum 0.040 0.050
Sulfur % maximum 0.040 0.050

Mechanical properties of A688 u-tubes

Grade and UNS Yield strength minimum ksi [Mpa] Tensile strength minimum ksi [Mpa] Elongation in 2in or 50mm minimum %
304, 316 S30400, S31600 30 [205] 75 [515] 35
304L, 316L S30403, S31603 25 [175] 70 [485] 35
XM-29 S24000 55 [380] 100 [690] 35
304N, 316N S30451, S31651 35 [240] 80 [550] 20
304LN, 316LN S30453, S31653 30 [205] 75 [515] 35
N08367 t≤0.187 45 [310] 100 [690] 30
N08367 t>0.187 45 [310] 95 [655] 30
N08926 45 [310] 94 [650] 35
S31254t≤0.187 45 [310] 100 [690] 35
S21254t>0.187 45 [310] 95 [655] 35
S32654 65 [450] 120 [825] 40

ASTM A688 welded tube testing

  • Tensile Strength
  • Reverse bending test
  • Flattening test
  • Flare test
  • Flange test
  • Dimensional
  • Hydrostatic Test
  • Pneumatic Test
  • Hardness
  • Eddy Current test
  • Intergranular Corrosion (option)

Tolerance of ASTM A688 TP316LN boiler tubes

Acceptable Description Tolerances
Leg Lengths Different ≤ 3.2 Milimeter
Deviation From Plane Of Bend ≤ 1.5 Milimeter
Leg Lengths Tolerance L L ≤ 6 M 6 > L ≤ 9 M L > 9 M +3.2 Milimeter – 0 +4 Milimeter – 0 +4.8 Milimeter – 0
Leg Spacing (Measured At Tangency Point) ± 1.5 Milimeter
Radius R ± 1.5 Milimeter
Wall Thickness In Bent Portion Shall Not Be Less Than The Value Determined By The below Equation: Tf = (4R X T) / (4R + D) Where : Tf = Wall Thickness After Bending T = minimum Wall Thickness Before Bending R = Centerline Bend Radius D = No minimal Outside Tube Dia
Ovality In The Bent Portion (Also Called Flattening) ± 10 % This Can Be Described As Follow. (D maximum – D) / D < 10% (D – D minimum) / D < 10% “Neither The Major Nor minimum or Dia Of The Tube Shall Deviate From The No minimal Dia Prior To Bending By More Than 10%”
Squareness Of Ends D ≤ 15.9 Milimeter 15.9 > D ≤ 25.4 D ≥ 25.4 ≤ 38.1 0.25 Milimeter 0.4 Milimeter 0.4 Milimeter

Chemical composition of ASTM A688 grade TP304LN material

Grade TP 304L TP 304 TP 316 TP 316L TP 316N . . . . . . TP 316LN TP 304LN TP 304N TP XM-29 . . . . . .
Element UNS S30403 S30400 S31600 S31603 S31651 N08367 N08926 S31653 S30453 S30451 S24000 S31254 S32654
Composition, %
Carbon, maximum 0.035 0.08 0.08 0.035 0.08 0.030 0.020 0.035 0.035 0.08 0.060 0.020 0.020
Manganese, maximumB 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 11.50– 1.00 2.0–4.0
14.50
Nickel 8.00– 8.00– 10.00– 10.00– 10.00– 23.50– 24.00– 10.00– 8.00– 8.00– 2.25– 17.5– 21.0–
13.00 11.00 14.00 15.00 14.00 25.50 26.00 15.00 13.00 11.0 3.75 18.5 23.0
Chromium 18.00– 18.00– 16.00– 16.00– 16.0– 20.00– 19.00– 16.00– 18.00– 18.0– 17.00– 19.5– 24.0–
20.00 20.00 18.00 18.00 18.0 22.00 21.00 18.00 20.00 20.0 19.00 20.5 25.0
Molybdenum 2.00– 2.00– 2.00– 6.00– 6.0– 2.00– 6.0– 7.0–
3.00 3.00 3.00 7.00 7.0 3.00 6.5 8.0
Phosphorus, maximum 0.040 0.040 0.040 0.040 0.040 0.040 0.03 0.040 0.040 0.040 0.060 0.030 0.030
Sulfur, maximum 0.030 0.030 0.030 0.030 0.030 0.030 0.01 0.030 0.030 0.030 0.030 0.010 0.005
Silicon, maximum 0.75 0.75 0.75 0.75 0.75 1.00 0.5 0.75 0.75 0.75 1.00 0.80 0.50
NitrogenC 0.10– 0.18– 0.15– 0.10– 0.10– 0.10– 0.20– 0.18– 0.45–
0.16 0.25 0.25 0.16 0.16 0.16 0.40 0.22 0.55
Copper . . . . . . . . . . . . . . . 0.75 maximum 0.5–1.5 . . . . . . . . . . . . 0.50–1.00 0.30–0.60

ASTM A688 seamless tube dimensions

Group Permissible Variations in Outside Diameter, in.[milimeter] Size, Outside Diameter, in(milimeter) Permissible Variations in WT, % PermisibleVariations

in Cut Length, in[milimeter]Over Under

ASTM A688 SS welded tube 1 ±0.005[0.13] Up to 1/2(12.7), excl ±15 1/8[3] 0
ASTM A688 stainless steel welded tube 2 ±0.005[0.13] 1/2 to 1 1/2(12.7 to 38.1 excl ±10 1/8[3] 0
ASTM A688 welded tube 3 ±0.010[0.25] 1 1/2 to 3 1/2(38.1 to 88.9 excl ±10 3/16[5] 0
A688 stainless steel welded tube 4 ±0.015[0.38] 3 1/2 to 5 1/2(88.9 to 139.7 excl ±10 3/16[5] 0
ASTM A688 welded tube 5 ±0.030[0.76] 5 1/2 to 5 1/2(139.7 to 230.2 excl ±10 3/16[5] 0

ASTM A688 mechanical properties

Class Size, inches Yield, min ksi Tensile, min ksi RA, % min Elong, % min in 2” Hardness, HBN
A Up to 20 - 47 - - 183 max
B Up to 20 30 60 36 24 120-174
C Up to 12 33 66 36 23 137-183
12 to 20 33 66 34 22 137-183
D Up to 8 37.5 75 40 24 149-207
8 to 12 37.5 75 35 22 149-207
12 to 20 37.5 75 19 20 149-207
Over 20 37.5 75 30 19 149-207
E Up to 8 44 85 40 25 174-217
8 to 12 44 85 37 23 174-217
12 to 20 43 83 35 22 174-217
F Up to 4 55 90 39 20 187-235
4 to 7 50 85 39 20 174-217
7 to 10 50 85 37 19 174-217
10 to 20 48 82 36 19 174-217
G Up to 12 50 80 40 24 163-207
12 to 20 50 80 38 22 163-207
H Up to 7 60 90 44 22 187-235
7 to 10 58 90 42 21 187-235
10 to 20 58 90 40 18 187-235
J Up to 7 70 95 50 20 197-255
7 to 10 65 90 50 20 187-235
10 to 20 65 90 48 18 207-255
K Up to 7 80 105 50 20 212-269
7 to 10 75 100 50 19 207-269
10 to 20 75 100 48 18 207-269
L Up to 4 105 125 50 16 255-321
4 to 7 95 115 45 16 235-302
7 to 10 85 110 45 16 223-293
10 to 20 85 110 40 14 223-293
M Up to 4 120 145 45 15 293-352
4 to 7 115 140 40 14 285-341
7 to 10 110 135 40 13 269-331
10 to 20 110 135 38 12 269-341
N Up to 4 140 170 40 13 331-401
4 to 7 135 165 35 12 331-401
7 to 10 130 160 35 11 321-388
10 to 20 130 160 35 11 321-402

Heat treatment of ASTM A688 tube

Class Heat Treatment
A Untreated
B Annealed, or normalized, or normalized and tempered
C Annealed, or normalized, or normalized and tempered
D Annealed, or normalized, or normalized and tempered
E Normalized and tempered or double normalized and tempered
F Quenched and tempered, or normalized, quenched and tempered
G Annealed, or normalized, or normalized and tempered
H Normalized and tempered
J Normalized and tempered, or normalized, quenched and tempered
K Normalized, quenched and tempered
L Normalized, quenched and tempered
M Normalized, quenched and tempered
N Normalized, quenched and tempered