ASTM A53 pipes and ASTM A106 pipes are very similar,they are the most commonly used carbon steel pipes for industry applications. Although the differences between ASTM A53 pipes and ASTM A106 pipes are few,they differ greatly in the time and place specified.To ensure that you are purchasing correct ASTM grade piping materials for your industrial applications,you need to understand the basic differences between the ASTM A53 and ASTM A106 standard specifications.
ASTM A53 Grade B seamless steel pipes
The differences between ASTM A53 pipes and ASTM A106 pipes:
Grade A53 VS Grade A106
ASTM A53 is standard specification used for steel pipes,which coating with black and hot-dipped,zinc-coated,the steel pipes according to this standard can be seamless pipes and welded pipes.ASTM A53 used in industries like on transport of air,steam,water and oil under low & medium pressure applications.In addition,ASTM A53 is also suitable for structural steels.
ASTM A106 is standard specification for seamless carbon steel pipe,which used for high-temperature service(up to 750 degrees F).
Grades of ASTM A53 Pipes VS ASTM A106 Pipes:
ASTM A53 standard has two grades:Grade A and Grade B,and it has three types of pipes:Type S(seamless steel pipes),Type E(electric resistance welded steel pipes),Type F(furnace welded steel pipes).ASTM A53 seamless steel pipes(Type S) and ASTM A53 electric resistance welded steel pipes(Type E) have both the two grades,but ASTM A53 furnace welded steel pipes(Type F) only have the Grade A.ASTM A106 standard is for seamless steel pipes,it has three grades:Grade A,Grade B and Grade C.A brief introduction is shown in the following table:
| ASTM A53 | Grade A | Grade B | – |
| Type S(seamless) | √ | √ | – |
| Type E(electric resistance welded) | √ | √ | – |
| Type F(furnace welded) | √ | – | – |
| ASTM A106 | Grade A | Grade B | Grade C |
| seamless | √ | √ | √ |
ASTM A106 seamless steel pipes
Chemical compositions of ASTM A53 Pipes VS ASTM A106 Pipes:
The chemical composition difference between ASTM A106 and ASTM A53 can be obtained from the following table:
1.ASTM A106 contains silicon with a minimum content of 0.10%.ASTM A53 don’t contain silicon.Silicon as an alloying element improves heat resistance in ASTM A106 pipe,which is rated for high-temperature service.Without it,regular exposure to high temperatures can weaken pipe over time,increasing its risk of failure.
2. ASTM A53 and ASTM A106 have different manganese content.
3.ASTM A106 and ASTM A53 standards contain varying amounts of sulfur and phosphorus,and the maximum content of ASTM A106 standard is 0.035%.The content of sulfur and phosphorus in ASTM A53 was 0.05 and 0.045% respectively.These elements are normally considered impurities in steel,so their incorporation in piping is minimal. However, the trace amounts of these elements add machinability to steel pipe.
| Specification | Grade | Chemical Composition,% | |||||||||
| C,Max | Mn,Max | P,Max | S,Max | Cu,Max | Ni,Max | Cr,Max | Mo,Max | V,Max | Si,Min | ||
| ASTM A53 | Grade A | 0.25 | 0.95 | 0.05 | 0.045 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 | – |
| Grade B | 0.30 | 1.20 | 0.05 | 0.045 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 | – | |
| ASTM A106 | Grade A | 0.25 | 0.27-0.93 | 0.035 | 0.035 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 | 0.10 |
| Grade B | 0.30 | 0.29- 1.06 | 0.035 | 0.035 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 | 0.10 | |
| Grade C | 0.35 | 0.29-1.06 | 0.035 | 0.035 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 | 0.10 | |
ASTM A106 Notes:
- Total of Cr, Cu, Mo, Ni, and V shall not exceed 1%;
- If the carbon content is lower than the stipulated maximum carbon content, the content of manganese in A106 seamless steel tube can be increased by 0.06% above the stipulated maximum manganese content for every 0.01% reduction of carbon content, but the maximum content shall not exceed 1.35%.
Mechanical properties of ASTM A53 pipes and ASTM A106 pipes:
| Spec | Mechanical Properties | |||
| Grade A | Grade B | Grade C | ||
| ASTM A53 | Tenside strength, min, psi (MPa) | 48000(330) | 60000(415) | – |
| Yield strength, min, psi (MPa) | 30000(205) | 35000(240) | – | |
| ASTM A106 | Tenside strength, min, psi (MPa) | 48000(330) | 60000(415) | 70000(485) |
| Yield strength, min, psi (MPa) | 30000(205) | 35000(240) | 40000(275) | |
Haihao Group manufacture ASTM A53 seamless and welded steel pipes,ASTM A106 seamless steel pipes and steel pipes according to other standard specifications such as ASTM A312,ASTM A333,ASTM A335,API 5L,API 5CT,etc.If you want to know more about our pipeline products,please email us:sales@haihaogroup.com
