ASTM A199 is a standard for seamless boiler tubes for heat exchangers, also known as ASTM A199/A199M.
It is mainly used to manufacture heating surface tubes for high-pressure boilers (working pressure is generally not greater than 9.8Mpa, working temperature is between 450°C and 650°C), such as headers, superheaters, reheaters, economizers, etc.
ASTM A199 standard boiler tubes are usually made of high-quality carbon steel or low-alloy steel, which have good heat resistance, corrosion resistance and mechanical properties, and can meet the requirements of high-temperature and high-pressure working environments.
ASTM A199 Physical Property
|
Steel Grade |
Tensile Strength Mpa min |
Yield Strength mpa |
Elongation % |
Hardness HRB max |
|
All grades except T91 |
60(415) |
60(415) |
25(170) |
85 |
|
T91 |
85(585) |
85(585) |
60(415) |
/ |
ASTM A199 Chemical Composition
|
Grade |
C |
Mn |
P,max |
S,max |
Si |
Cr |
Mn |
|
T4 |
0.05 - 0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50-1.00 |
2.15-2.85 |
0.44-0.65 |
|
T5 |
0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50 |
4.00-6.00 |
0.45-0.65 |
|
T9 |
0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.25-1.00 |
8.00-10.00 |
0.90-1.10 |
|
T11 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50-1.00 |
1.00-1.50 |
0.44-0.65 |
|
T21 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50 |
2.65-3.35 |
0.80-1.06 |
|
T22 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
1.90-2.60 |
0.87-1.13 |
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 |
ASTM A199/A199M, Specification for Seamless Cold-Drawn Intermediate Alloy-Steel Heat-Exchanger and Condenser Tube
Outer Diameter:3.2-76.2 mm
Wall Thickness: 1mm~150mm (SCH10 ~ XXS)
Length: 5.8m~12m,etc
Grades:T4,T5,T9,T11,T21,T22,T91
Applicable temperature:These heat exchangers are designed for service temperatures ranging from – 100°C to +625°C (-150°F to 1150°F).
