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ASTM A200-89 

SEAMLESS INTERMEDIATE ALLOY STEEL STILL TUBES FOR REFINERY SERVICE

This standard is issued under the fixed designation A 200; 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.

1.Scope

1.1This specification covers several grades of minimum-wall-thickness, chromium-molybdeum
and chromium-mo-lybdenum-silicon,seamless, hot-finished and cold-finished,intermediate alloy-steel still tubes, for use in carrying fluids at elevated temperaures and presures in various types of heaters, in which the tubes may be subjected to a furnace temperature higher than that of the contained fluid.

1.2 This specification covers tubes 2 to 9 in., (50.8 to 228.6 mm) inclusive, in outside diameter and over 0.220 in. (5.59 mm)in minimum wall thickness.

1.3 Where butt welding is used to obtain length longer than single length normally produced in the mill, Specification A 422 shall cover the requirements for butt welds.

1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 

TABLE 1 Chemical Requirements

Grade Composition, %
Carbon Manganese Phosphorus,
max
Sulfur,
max
Silicon Chromium Molybdenum Others
T4 0.05 min-0.15 max 0.30-0.60 0.025 0.025 0.50-1.00 2.15-2.85 0.44-0.65 ...
T5 0.15 max 0.30-0.60 0.025 0.025 0.50 max 4.00-6.00 0.45-0.65 ...
T7 0.15 max 0.30-0.60 0.025 0.025 0.50-1.00 6.00-8.00 0.45-0.65 ...
T9 0.15 max 0.30-0.60 0.025 0.025 0.25-1.00 8.00-10.00 0.90-1.10 ...
T91 0.08-0.12 0.30-0.60 0.020 0.010 0.20-0.50 8.00-9.00 0.85-1.05 Ni 0.40 max
- - - - - - - - V-0.18-0.25;
- - - - - - - - Cb-0.06-0.10
- - - - - - - - N-0.03-0.07
- - - - - - - - Al-0.04 max
T11 0.05 min-0.15 max 0.30-0.60 0.025 0.025 0.50-1.00 1.00-1.50 0.44-0.65 ...
T21 0.05 min-0.15 max 0.30-0.60 0.025 0.025 0.50 max 2.65-3.35 0.80-1.06 ...
T22 0.05 min-0.15 max 0.30-0.60 0.025 0.025 0.50 max 1.90-2.60 0.87-1.13 ...

 


  TABLE 2 Tensile Requirements

- All Grades Except T91 Grade T91
Tensile strength, min, psi [MPa]

Yield strength, min, psi[MPa]

Elongation in 2 in. or 50 mm (or 4D), min, %:
Basic minimum elongation for walls 5/16 in. (7.9mm) and over in thickness, longitudinal strip tests, and for all small sizes tested in full section
When standard round 2-in. or 50-mm gage or smaller proportionally sized specimen with the gage length wqual to 4D (4 times the diameter) is used.
For longitudinal strip tests a deduction shall be made for each 1/32-in. (0.79-mm) decrease in wall thickness below 5/16 in. (7.9 mm) from the basic minimum elongation of the following percentage points
60 [414] 85 [585]
25 [172] 60 [414]
30 20
1.50A 1.00A
AThe following table gives the computed minimum values:
Wall Thickness Elongation in 2 in. 50 mm, min, %B
in. mm All grades except T91 Grade T91
5/16 (0.312) 7.94 30 20
9/32 (0.281) 7.14 28 19
1/4 (0.250) 6.35 27 18
7/32 (0.219) 5.56 26 17
3/16 (0.188) 4.76 24 16
5/32 (0.156) 3.97 22 15
1/8 (0.125) 3.18 21 14
3/32 (0.094) 2.38 20 13
1/16 (0.062) 1.59 18 12

Note-The above table gives the computed minimum eiongation values for each 1/32-in. (0.79 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: All Grades except T91:E =48t + 15.00 
Grade T91: E = 32t + 10.00 

where:
E = elongation in 2 in.or (50 mm) %, and
t = actual thickness of spectimen, in. (mm).
BCalculated elongation requirements shall be rounded to the nearest whole number.

TABLE 3 Plug Gage Dimensions for Tubes with Plain Ends


Note-A plug gage 4 in. in length with a diameter determined by the proper equation prescribed in this table shall enter each end of each tube for a distance of 4 in.


Outside Diameter, in. Hot-Rolled Still Tubes Cold-Finished Still Tubes
EquationsA EquationsA
U.S. Customary Units, in.
4 and under PG = D - (2t/0.875) - 0.077 PG = D - (2t/0.90) - 0.0625
Over 4 to 7 1/2, incl PG = D - (2t/0.875) - 0.102 PG = D - (2t/0.90) - 0.080
Over 7 1/2 to 9, incl PG = D - (2t/0.875) - 0.115 PG = D - (2t/0.90) - 0.090
Sl Units, mm
102 and under PG = D - (2t/0.875) - 1.96 PG = D - (2t/0.90) - 1.59
Over 102 to 191, incl PG = D - (2t/0.875) - 2.59 PG = D - (2t/0.90) - 2.03
Over 191 to 229, incl PG = D - (2t/0.875) - 2.92 PG = D - (2t/0.90) - 2.29


A Expressions used in equations are as follows:
PG = diameter of plug gage, in.
D = specified outside diameter of tube, in,. and 
t = specified thickness of tube wall, in.   

TABLE 4 Plug Gage Dimensions for Tubes with Internal Upset Ends 

Note-For tubes that are upset at the ends, a "go" plug gage with a diameter determined by the appropriate equation given in the table shall enter each upset end the full length of the upset. A "no-go" plug gage using the same equation without the clearance allowance shall not enter the tube.


Specified Length of upset, in.A Hot-Rolled Still Tubes Cold-Finished Still Tubes
EquationsA EquationsA
U.S. Customary Units, in.
3 and under PG = D - 2 [(t/0.875) + U] - 0.093 PG = D - 2 [(t/0.90) + U] - 0.093
Over 3 to 4, incl PG = D - 2 [(t/0.875) + U] - 0.113 PG = D - 2 [(t/0.90) + U] - 0.113
Over 4 to 5, incl PG = D - 2 [(t/0.875) + U] - 0.133 PG = D - 2 [(t/0.90) + U] - 0.133
Sl Units, mm
76 and under PG = D - 2 [(t/0.875) + U] - 2.36 PG = D - 2 [(t/0.90) + U] - 2.36
Over 76 to 102, incl PG = D - 2 [(t/0.875) + U] - 2.87 PG = D - 2 [(t/0.90) + U] - 2.87
Over 102 to 127, incl PG = D - 2 [(t/0.875) + U] - 3.38 PG = D - 2 [(t/0.90) + U] - 3.38


A Specified length of full upset is minimum.
B Expressions used in equations are as follows:
PG = diameter of plug gage, in.
D = specific outside diameter of tube, in.
t = specified thickness of tube wall, in,. and
U = increase in tube wall thickness at upset end, in. 

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

ASTMS
TANDARD
UNS NO. KOREA/JAPANES GERMAN BRITISH BELGIAN FRENCH ITALIAN
KS/JIS Symbol KS/JIS Numbe Remarks DIN Type DIN
Number
Materiral
Number
Re
marks
B.S
Number
B.S Grade Remarks NBN Type NBN Grade Re
marks
AFNOR Type NF Number Re
marks
UNI Type UNI No Ramarks
A 200Seamless Intermediate Alloy Steel Still Tubes for Refinery Service                                        
T 5 K41545 STHA 24 / STBA 25 D3572 / G3462 (32) 12 CrMo 19 5   1.7362 (3a) 3604 625 (30)(32) X12CrMo 837 (32) TU Z 12 CD A49-213 (32)     Dalmine 234(3b)
T 11 K11597 STHA 22 / STBA 23 D3572 / G3462 (32) 13 CrMo 44 17175 1.7335 (8) 3604 621 (30)(32)       5.05 A49-213 (32)     Dalmine 227(3b)
T 22 K2159 STHA 23 / STBA 24 F3572 / G3462 (32) 10 CrMo 9 10 17175 1.7380   3606 622 (30)(32) 10 CrMo 9 10 837 (32) TU 10 CD 5.05 A49-213 (32) 12CrMo 9 10 5462 (3b)
                            TU 12 CD 9.10          




JIS Number and Corrensponding Foreign Standards 

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
G3467 STF                           2604/2 TS9H C C013
  (STF42) C                                
  STFA12 Mo A161 T1 Mo                          
  STFA22 CrMo                                
  STFA23 CrMo A200 T11 CrMo                          
  STFA24 CrMo A200 T22 CrMo                          
  STFA25 CrMo A200 T5 CrMo                   2604/2 TS37 CrMo  
  STFA26 CrMo A200 Tp CrMo                          
  SUS   A271 TP304 SUS                   2604/2 TS47 SUS  
  304FT SUS                                
  SUS   A271 TP304H SUS             A49-218 TUZ6CN 18.09   2604/2 TS48 SUS  
  304HTF                                  
  SUS       SUS                          
  309SFT SUS                                
  SUS       SUS                   2604/2 TS68 SUS  
  310STF SUS                                
  SUS   A271 TP316 SUS             A49-218 TUZ6CND 17.11   2604/2 TS61 SUS  
  316TF SUS                                
  SUS   A271 TP316H SUS                   2604/2 TS63 SUS  
  316HTF SUS                                
  SUS   A271 TP321 SUS                   2604/2 TS53 SUS  
  321TF SUS                                
  SUS   A271 TP321H SUS             A49-218 TUZ6CNT 18.10 SUS        
  321HTF SUS                                
  SUS   A271 TP347 SUS             A49-218 TUZ6CNNb 18.10 SUS 2604/2 TS50 SUS  
  347TF SUS                                
  SUS   A271 TP347H SUS                          
347HTF SUS
NCF8000TF NiCr
NCF8000HTF NiCr

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