As the Indian Government is racing in its efforts to provide power supply to each and every corner of the country. This will definitely lead to high growth of industries. Power - which is essential element for industrial development has to be generated constantly and continuously. This requires high capacity power station. The main equipment of such power stations is High Capacity Boilers. These boilers are having Alloy Steel Tubes which withstand operating temperatures of about 600 degrees Centigrade (1110 degrees Fahrenheit) and pressure up to 320 bar (4645 PSI) over the planet life - a period of several decades.

Alloy Steel Boiler Tubes in India are governed by the Indian Boiler Regulations Act. Each pipe / tube is required to be genuine, of reputed make and certified by the IBR.

Motilal Laxmichand Sanghavi - We are one of the leading stockiest of IBR certified alloy steel pipes and tubes. The material is available in ready stock with IBR certificates in Form III - A and III - B respectively for pipes and tubes.


Specifications governing Alloy Steel Tubes are as under:

Pipes

Tubes

ASTM A 335 Grade P - 11 ASTM 213 Grade T - 11
ASTM A 335 Grade P - 12 ASTM 213 Grade T - 12
ASTM A 335 Grade P - 22 ASTM 213 Grade T - 22
ASTM A 335 Grade P - 9 ASTM 213 Grade T - 5
ASTM A 335 Grade P - 9 A ASTM 213 Grade T - 9
ASTM A 335 Grade P - 5 ASTM 213 Grade T - 9 A
BS 3604 Grade 620 - 440 ASTM 213 Grade T - 2
BS 3604 Grade 621 ASTM 213 Grade T - 1
BS 3604 Grade 622 ASTM 213 Grade T - 1 B
BS 3604 Grade 625 DIN 17175 15 Mo 3
BS 3604 Grade 629 - 470 DIN 17175 13 Cr Mo 44
BS 3604 Grade 629 - 590 DIN 17175 10 Cr Mo 910
BS 3604 Grade 660 DIN 17175 14 Mo V 63
BS 3604 Grade 762 DIN 17175 X 20 Cr Mo V 121

MOTILAL LAXMICHAND SANGHAVI
113, Kika Street,Gulalwadi,
Mumbai-400 004, India.

Tel.: 91-022-23473752, 23462393
23464364, 23468386
.

E-mail:molax@bom5.vsnl.net.in

BS 3059 Grade 243
BS 3059 Grade 620 - 460
BS 3059 Grade 622 - 490
BS 3059 Grade 629 - 470
BS 3059 Grade 629 - 590
BS 3059 Grade 762

 

As the manufacturing facilities in India are limited to 8" NB. We have made special arrangements to keep a constant ready stock of alloy steel material up to sizes 10" NB, 12" NB, 14" NB, 16" NB in Schedule 20, 40, 60, 80, 100, 160, XXS, as well as some higher wall thickness material up to 45 mm thick, in all alloy steel specifications. Our complete size range comprises of 15 mm NB to 16" NB.

In tube sizes, smaller size range from 19.05 mm OD up to 101.6 mm OD in Wall Thickness of 2.11 mm up to 12.7 mm thick is available in ready stock with us in all alloy steel specifications.


1. For D =< 3 in.

1.1 tolerances on outside diameter (D)

Hot finished tubes Usual standards Cold drawn tubes
Diameter Standards requirements

MLS

Diameter Standards requirements MLS
mm in. mm in. mm in. mm in. mm in. mm in.
76.2 max. 3 in. max. + 0.4 -0.8 +1/64
-1/32
+/- 0.4 +/- 1/64 ASTM
A 192
A 209
A 210
A 213
D=<25.4
25.4<D=<38.1
38.1<D<50.8
50.8=<D<63.5
63.5=<D<76.2
D = 76.2
D =< 1
1<D=<1.5
1.5<D<2
2=<D<2.5
2.5=<D<3
D = 3
+/- 0.1
+/- 0.15
+/- 0.2
+/- 0.25
+/- 0.3
+/- 0.38
+/- .004
+/- .006
+/- .008
+/- .010
+/- .012
+/- .015
According
to Standards
76.2
max.
3 in.
max.
+/- 0.75 %
min.
0.5
+/- 0.75 %
min.
.020
+/- 0.4 +/- 1/64 DIN17175 76.2
max.
3 in.
max.
+/- 0.6 %
min.
+/- 0.25
+/- 0.6%
min. 
.010
D =< 63.5 D=< 2.500 in. +/- 0.5
+/- 0.75%
+/- .020
+/- 0.75%
+/- 0.4 +/- 1/64 NFA A 49-213 D =< 33.7
33.7<D=<75.2
D=<1.33
1.33<D=<3
+/- 0.25
+- 0.50 %
min
+/- 0.25
+/- 0.10
+/- 0.50 % min.
+/- .010

1.2 tolerances on wall thickness (T)

Hot Finished tubes

Usual
Standards
Cold draw tubes

Wall thickness

Standards
requirements

MLS Diameter Standards
requirements
MLS
mm in. mm in.
On minimum W.T.:Tm   On minimum W.T. : Tm
Tm=<2.4
2.4<Tm=<3.8
3.8<Tm=<4.6
Tm>4.6
Tm=<.095
.095<Tm=<.150
.150<Tm=<.180
Tm>.180
+ 40% - 0
+ 35% - 0
+ 33% - 0
+ 28% - 0
+ 28% - 0
+ 28% - 0
+ 24% - 0
+ 22% - 0
 
ASTM 
A 192
A 209
A 210
A 213
D=<38.1
D>38.1
D=<1 1/2
D>1 1/2
+ 20% - 0
+ 22% - 0
According 
to standards
On nominal W.T.: Ta   On nominal W.T.: Ta
Sn = standard W.T. according to DIN 2448 According
to standards
DIN 17175 Refer to "Hot finished tubes"
Ta=<2Sn
2Sn<Ta=<4.Sn
Ta>4Sn
+15% - 10%
+12.5%-10%
+/- 9%
All W.T. +/- 12.5%
min 0.4 mm
min. .016 in.
According
to standards
NF A 49-213 All diameters +/- 10% According
to standards

 Guidelines for fabrication procedures

GRADES OPERATIONS GUIDELINES
Grade A
Grade B
360
410
St. 35.8
St. 45.8
TU 37-C
TU 41-c
Cold bending heat treatment at 1200/1300F after heavy bending
Hot bending -temperature Zone to be avoided 1380/1560F advisable working temperature : 
light bending:< 1380F
heavy bending: 1560/2000F
Welding no preheating final heat teatment for W.T. >= 10 mm(3/8 in.) annealing at 1300F
Grade C
440
460
490 Nb
17 Mn 4
19 Mn 5
TU 48-C
TU 52-C
Cold bending heat treatment at 1200/1300F after heavy bending
Hot bending temperature zone to be avoided 1380/1560F
advisable working temperature
light bending:<1380F
heavy bending: 1560/2000F
Welding preheating at 300/400F for W.T.>= 20mm(3/4 in.)
final heat treatment for W.T.>= 10mm(3/8 in). annealing at 1300F
P 1
T 1
243
15 Mo 3
16 Mo 5
TU 15 D 3
Cold bending light bending: no heat treatment
heavy bending: annealing at 1250F necessary
Hot bending Temperature zone to be avoided 1380/1650F
advisable working temperature:
light bending: < 1380F
heavy bending: 1750/2000F(1)
Welding perheating at 400F min. recommended for W.T.>= 20mm or 3/4 in. (light preheating possible for W.T. < 20 mm or 3/4 in.)
final heat treatment:
W.T.>= 20mm(3/4 in.) tempering at 1250F
W.T. < 20mm(3/4 in.) tempering at 1250F recommended but not compulsory
P2
T2
TU 15CD 2.05
Cold bending light bending: no heat treatment
heaving bending: annealing at 1300F necessary
Hot bending temperature zone to be avoided 1380/1650 F
recommended working temperature.
light bending:<1380F
heavy bending: 1750/2000 F - annealing at 1250F (1)
Welding preheating at 400F min. recommended for W.T. >= 10mm or 3/8 in. (light preheating possible for W.T> < 10 mm or 3/8 in.)
final heat treatment: annealing at 1250F (2 mn 30s per mm W.T. with 20mm minimum) then air cooling
15 NiCuMoNb 5 Cold bending light bending: no heat treatment
heavy bending: normalizing at 1650/1800F tempering at 1075/1220F
Hot bending refer to specification SEW 088(available upon request)
Welding Preheating at 210F minimum for W.T. >=(1 1/4 in.)
(temperature  to maintain during complete operation)
final heat treatment annealing at 985/1095F
(2 mn per mm W.T. minimum 20 mn) then air cooling
P 11
T 11
621
13CrMo44
Tu 13CD 4 04
TU 10CD 5 05
Cold bending light bending: no heat treatment
heavy bending: annealing at 1300F necessary
Hot bending temperature zone to be avoided : 1380/1650F
recommended working zone:
light bending: 1250/1380 F
heavy bending: 1750/2000F - tempering at 1300F(1)
GRADES OPERATIONS GUIDELINES
P 11
T 11
621
13 CrMo 4 4
TU 13CD 4 04
TU 10CD 5 05
Welding Preheating 400F minimum for W.T.>=10 mm(3/8 in.)
(temperature to maintain during operation)
light preheating possible for W.T. <10 mm(3/8 in.)
final heat treatment: tempering at 1300F (2mn 30s per mm W.T., 20 mn minimum)then air cooling.
 

 P 22
T 22
622
10 CrMo 9 10
TU 10CD 9 10

 
Cold bending light bending: no heat treatment
heavy bending annealing at 130/1380F necessary
Hot bending temperature zone to be avoided: 1380/1650F
recommended working temperature:
Welding Preheating: 400F minimum (maintain during complete operation)
final heat treatment.
tempering at 1330/1380F(2mn 30s per mm or .04 in. W.T., 20 mn minimum)
then air cooling
or better: complete heat treatment
P 9
T 9
629
X 12 CrMo 9 1
Tu Z 10CD 9
Cold bending Light bending: no heat treatment
heavy bending: annealing at 1380F necessary
Hot bending avoid water cooling
recommended working temperature: 1750/2000F
after bending, repeat complete heat treatment.
(or just anneal when temperature < 1830F)
Welding preheating 570F minimum (maintain during complete-operation)
final heat treatment: tempering at 1380/1430 F
(2mn 30s per mm or .04 in W.T., minimum 60mn) then air cooling
 

T 9 1
P 9 1
TU Z 10CDNb V 9.2

 
cold bending possible if: D=< 60 mm(2 1/2 in.) and Eex =< 20%
if Eex =< 5% stress relieving annealing can be avoided except in case of stress corrosion cracking hazard
if 5%<Eex=<20%:stress relieving annealing at 1380F +/- 70F
Note:Eex=elongation at extrados
Hot bending bending at 1200/1430F, then annealing at 1380F +/- 70F if: W.T.=<0.1 D and R >=2.5 D and Eex=<10% bending at 1740/1920F then normalizing at 1900F min. and tempering at 1350F min. if:
W.T.=<0.1 D and R min. 2.5 D and Eex=< 20%
or W.T.>0.1D
or R between D and 2.5D
(Eex can be more than 20%)
bending between 1470 and 1740F shall be avoided water cooling is prohibited
Note: R=bending radius
Welding preheating: 480F min. interpass temperature 570F min.
preheating 180F for 2 hours,
then slow air cooling.
PWHT: 1380F +/- 50F for 2 hours
762 X20 Cr MoV 12 1 Cold bending avoid if possible
if necessary, annealing afterwards at 1380F
Hot bending water cooling prohibited
recommended working temperature: 1750/200F
after bending, repeat complete heat treatment; if not possible, tempering at 1340/1470F
Welding preheating: 570F minimum(maintain during complete operation)
final heat treatment: after welding, cooling below 300F
(But not below 210F for heavy W.T.)
then tempering at 1380F for 2hours minimum

Typical steel grades

Max. service temp. 475C / 885F 500C / 930F 550C
1020F
560C
1040F
575C
1065F
600C / 1110F 625C
115F
650C
1200F
ASTM
A 106
A 192
A209-A210
A213-A335
Gr.A
A 192
Gr. B
Gr. A.
Gr.C
Gr.C
      T1
P1
   T2/P2 T12/P12    T 11/P 11 T22/P22       T9/P9 T91/P91
BS
3059-3602-3604
360 410 440-460 490Nb 243          620    621 622 660    629 762
DIN
17175
Vd TUV W.BI.
(Werkstoff-Nr.)
St 35.8
1.0305
St 45.8
1.0405
17Mn4
1.0481
19 Mn5
1.0482
15 Mo 3
1.5415
16 Mo 5
1.5423
15 NiCuMo Nb 5
1.6368
   13 CrMo44
1.7335
      10 CrMo 910
1.7380
14 MoV 63
1.7715
   X12CrMo 91
1.7386
X20 CrMoV121
1.4922
GOST
TY14-3-460-75
   20                   15XM 12X1MF          15 X 1M1F      
JIS
G3456 G3458
G3461 G3462
STPT 38
STB 35
STPT 42
STB 42
STPT 49       STPA 12
STBA 12
   STPA 20
STBA 20
STPA 22
STBA 22
   STPA 23
STBA 23
STPA 24
STBA 24
      STPA 26
STBA 26
  
NF A 49-213 TU 37-C TU 42-C TU 48-C TU 15 D 3 TU 15 D 3       TU 15CD 2.05 TU 10CD 5.05    TU 10CD 5.05 TU 10CD 9.10       TUZ 10CD 9 TU Z 10CDNbV 9.2

Home