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ASTM A199M-89 

Seamless Cold Drawn Intermediate Alloy Steel 
Heat Exchanger and Condenser Tubes

This standard is issued snder the fixed designatioa A 199/A 199M ; the number immediately following the designation indicates the year of original adpton or , in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval. 


1. Scope

1.1 This specification covedrs several grades of minimum-wall-thickness, chromium-molybdenum and chromium-molybdenum-silicon, seamless, cold-drawn, intermediate alloy steel tubes for heat exchangers, condensers, and similar heat transfer apparatus.

1.2 The tubing sizes usually furnished to this specification are 1/8 to 3 in. [3.2 to 76.2 mm) in outside diameter. Tubing having other dimensions may be furnished provided such tubes comply with all other requirements of this spedification.

1.3 Mechanical property requirements do not apply to tubing smaller than 1/8 in [3.2 mm] in inside diameter or 0.015 in [0.4mm] in thickness. 

1.4 The values stated in either inch-pound units or SO units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therfore, each system must ve 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.

Chemical composition

Grade Mfg. Process Chemical composition(%)
C Si Mn P S Ni Cr Mo Others
T4 S 0.05~0.15 0.50~1.00 0.30~0.60 0.030Max 0.030Max - 2.15~2.82 0.44~0.65 -
T5 S 0.15Max 0.50Max 0.30~0.60 0.030Max 0.030Max - 4.00~6.00 0.45~0.65 -
T7 S 0.15Max 0.50~1.00 0.30~0.60 0.030Max 0.030Max - 6.00~8.00 0.45~0.65 -
T9 S 0.15Max 0.50~1.00 0.30~0.60 0.030Max 0.030Max - 8.00~10.00 0.90~1.10 -
T11 S 0.05~0.15 0.25~1.00 0.30~0.60 0.030Max 0.030Max - 1.00~1.50 0.44~0.65 -
T21 S 0.05~0.15 0.50~1.00 0.30~0.60 0.030Max 0.030Max - 2.65~3.35 0.80~1.06 -
T22 S 0.05~0.15 0.50Max 0.30~0.60 0.030Max 0.030Max - 1.90~2.60 0.87~1.13 -
T91 S 0.05~0.15 0.50Max 0.30~0.60 0.020Max 0.010Max 0.40Max 8.00~9.50 0.85~1.05 V 0.18~0.25 Cb 0.06~0.10 N 0.03~0.07 AL 0.04Max


Mechanical Properties

Grade Tensile Test MPa or N/mm2 Remaks (Similar to JIS) Possibility Temperature
Min Yield point Tensile Strength
T4 170 415Min -
T5 170 415Min (STBA25)
T7 170 415Min -
T9 170 415Min (STBA26)
T11 170 415Min (STBA23)
T21 170 415Min -
T22 170 415Min (STBA24)
T91 170 415Min -


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 ...
T9 0.15 max 0.30-0.60 0.025 0.025 0.25-1.00 8.00-10.00 0.90-1.10 ...
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 ...
T91 0.08-0.12 0.30-0.60 0.020 0.010 0.20-0.50 8.00-9.50 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

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, 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. (7.9mm) from the basic minimum elongation of the following percentage points

When standard round 2-in. or 50-mm gage length or small er proportionally sized specimen with the gage length equal to 4D (four times the diameter) is used
60 [415] 85 [585]
25 [170] 60 [415]
30 20
1.50A 1.00A
22 -
AThe following table gives the computed minimum values:
Wall Thickness in. [mm] Elongation in 2 in. 50 mm, min, %B
5/16 (0.312) [8] 30 20
9/32 (0.281) [7.2] 28 19
1/4 (0.250) [6.4] 27 18
7/32 (0.219) [5.6] 26 17
3/16 (0.188) [4.8] 24 16
5/32 (0.156) [4] 23 15
1/8 (0.125) [3.2] 21 14
3/32 (0.094) [2.4] 20 13
1/16 (0.062) [1.6] 18 12
0.062 to 0.035 [1.6 to 0.9], excl 17 12
0.035 to 0.022 [0.9 to 0.6], excl 16 11
0.022 to 0.015 [0.6 to 0.4]. incl 16 11

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: For all Grades except T91:E =48t + 15.00 [E = 1.87t + 15.00]
For Grade T91: E = 32t + 10.00 where:
E = elongation in 2 in.or 50 mm, %, and
t = actual thickness of spectimen, in.
BCalculated elongation requirements shall be rounded to the nearest whole number.

TABLE 3 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 o.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

Material Comparison Tables (ASTM ¡æKS, JIS, DIN, BS, NBN, NF, UNI)

ASTMS
TANDARD
UNS NO. KOREA/JAPANES GERMAN BRITISH BELGIAN FRENCH ITALIAN
KS/JIS Symbol KS/JIS Numbe Re
marks
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 Re
marks

A 199

Seamless Cold Drawn Intermediate Alloy Steel Heat Exchange and Condenser Tubes

T5 K41545 STHA 24 / STBA 25 D3572 / G3462 (35) 12 CrMo 19 5 1.7362 (3a) 3606 CFS 625 (35) X 12 Cr Mo 5 837 (35) Z 12 CD 5.05 (3a) (3); dalmine 234
T11 K11597 STHA 22 / STBA 23 D3572 / G3462 (35) 13 CrMo 44 17175 1.7335 (8) 3606 CFS 621 (35) 10 CD 5.05 (3a) (3); dalmine 227(10)
T22 K21590 STHA 23 / STBA 24 D3572 / G3462 (35) 10 CrMo 9 10 17175 1.7380 3606 CFS 622 (35) 10 Cr Mo 9 10 837 (35) 10 CD 9.10 (3a) 12CrMo 9 10 5462 (10)0


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
G3462 STBA12 Mo A209 T1 Mo 3606 ERW245 Mo                   C011
      A250 T1 Mo " CEW245 Mo                    
            " CFS245 Mo                    
  STBA13 Mo A209 T1-A Mo                          
      A250 T1-a Mo                          
      A629 - Mo                          
  STBA20 CrMo A213 T2 CrMo                          
  STBA22 CrMo A213 T12 CrMo 3059 S1 620 CrMo 17175 13CrMo44 CrMo              
            " S2 620 CrMo                    
            3059 ERW620 CrMo                    
            " CEW620 CrMo                    
            3604 HFS620-460 CrMo                    
            " CFS620-460 CrMo                    
            " ERW620-460 CrMo                    
            " CEW620-460 CrMo                    
            " HFS620-440 CrMo                    
            " CFS620-440 CrMo                    
            " ERW620-440 CrMo                    
            " CEW620-440 CrMo                    
            3606 ERW620 CrMo                    
            " CEW620 CrMo                    
            " CFW620 CrMo                    
  STBA23 CrMo A199 T11 CrMo 3604 HF621 CrMo       A49-213 TU10CD CrMo        
      A213 T11 CrMo " CFS621 CrMo       A49-215 TU10CD5.05 CrMo        
            " ERW621 CrMo                    
            " CEW621 CrMo                    
            3606 ERW621 CrMo                    
            " CEW621 CrMo                    
            " CFS621 CrMo                    
STBA24 CrMo A199 T22 CrMo 3059 S1-622-440 CrMo 17175 10CrMo910 CrMo A49-213 Tu10CD9.10 CrMo
      A213 T22 CrMo " S2-622-440 CrMo       A49-215 Tu!0CD9.10 CrMo        
            " S1-622-490 CrMo                    
            " S2-622-490 CrMo                    
  STBA25 CrMo A199 T5 CrMo 3604 HFS625 CrMo             260 4/2 TS37 CrMo  
      A213 T5 CrMo " CFS625 CrMo                    
            3606 CFS625 CrMo                    
  STBA26 CrMo A199 T9 CrMo 3059 S1-629-470 CrMo       A49-213 TUZ10CD9 CrMo        
      A213 T9 CrMo " S2-629-470 CrMo       A49-215 TUZ10CD9 CrMo        
            " S1-629-470S2-629-590 CrMo                    
            " S2-629-590 CrMo                    
            3604 HFS629-470 CrMo                    

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