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Pipe Materials, Pipes, Technical Library

Difference Between A53 vs. A106 Pipe

Difference Between A53 vs. A106 Pipe

What is the difference between A53 vs A106 pipes? Whilst ASTM A53 and A106 pipes are similar in terms of chemical composition and mechanical properties, ASTM A53 pipes used for low/medium temperature and pressure applications, ASTM A106 pipes for higher temperatures-pressures and when seamless execution is a mandatory design requirement.

 

ASTM A106 and ASTM A53 pipes are very close in terms of chemical composition and mechanical properties: indeed, it is not uncommon to find pipes that comply to both standards simultaneously (as shown in the image below).

The key differences between ASTM A106 and ASTM A53 pipes are related to the:

  • Manufacturing process: ASTM A106 steel pipes are available only in seamless execution, whereas ASTM A53 steel pipes are either welded or seamless
  • Covered pressure/temperature range: ASTM A106 pipes withstand higher pressure and temperature ranges than ASTM A53
  • Chemical composition (differences are really minimal).

 

A53 VS. A106: CHEMICAL COMPOSITION

The chart compares the chemical composition of A53 vs. A106 pipes (grade B). The few differences are related to the chemical elements Mn, P, S, and Si (in red). In particular, Silicon is absent in A53 pipes, whereas it is present in ASTM A106 pipes (silicon gives to the steel alloy better resistance to high temperatures).

Standard Grade Chemical Composition %
C Mn P S Si Cr Cu Ni Mo
ASTM A106 B ≤0.30 0.29-1.06 ≤0.035 ≤0.035 >0.10 ≤0.40 ≤0.40 ≤0.40 ≤0.15 ≤0.08
ASTM A53 B ≤0.30 ≤1.20 ≤0.05 ≤0.045 ≤0.40 ≤0.40 ≤0.40 ≤0.15 ≤0.08
API 5L B(PSL-1) ≤0.28 ≤1.20 ≤0.030 ≤0.030
DIN 1629
DIN 2448
St 37.0 ≤0.17 ≤0.040 ≤0.040
St 44.0 ≤0.21 ≤0.040 ≤0.040
EN10210 S235JRH ≤0.17 ≤1.40 ≤0.040 ≤0.040
GB/T8163
GB/T8162
10# 0.07-0.13 0.35-0.65 ≤0.035 ≤0.035 0.07-0.37 ≤0.15 ≤0.25 ≤0.30
20# 0.17-0.23 0.35-0.65 ≤0.035 ≤0.035 0.17-0.37 ≤0.25 ≤0.25 ≤0.30

 

A53 VS. A106: MECHANICAL PROPERTIES

The chart shows a comparison between A53 vs A106 pipes in terms of mechanical properties (tensile/yield strength, elongation, and impact test requirements), which are minimal if not existing at all.

YIELD AND TENSILE STRENGHT A53 VS. A106 in MPa

Standard Grade Tensile Strength
(MPa)
Yield Strength
(MPa)
Trans.Elongation
(%)
Impact Test
(J)
ASTM A106 B >415 ≥240 ≥16.5
ASTM A53 B >415 ≥240
API 5L B(PSL-1) >414 ≥241 As clause a
DIN 1629 St 37.0 350-480 ≥235 ≥23
DIN 2448 St 44.0 420-550 ≥275 ≥19
EN10210 S235JRH 360-510 ≥235 ≥26 27 (+20°C)
GB/T 8163 10# 335-475 ≥205 ≥24
GB/T 8162 20# 410-550 ≥245 ≥20

 

YIELD AND TENSILE STRENGHT A53 VS. A106 in PSI

Pipe material Yield Strength minimum psi Tensile Strength minimum psi
ASTM A53 Gr. A
ASTM A106 Gr. A
API 5L Gr. B
30,000.00 48,000.00
ASTM A252 Gr.1 30,000.00 50,000.00
ASTM A53 Gr. A
ASTM A106 Gr. A
API 5L Gr. A
35,000.00 60,000.00
ASTM A252 Gr. 2 35,000.00 60,000.00
ASTM A501 36,000.00 58,000.00
ASTM A106 Gr. C 40,000.00 70,000.00
ASTM A252 Gr. 3 45,000.00 66,000.00
API 5L X42 42,000.00 60,000.00
API 5l Gr X46 46,000.00 63,000.00
API 5l Gr X52 52,000.00 66,000.00
API 5l Gr X56 56,000.00 71,000.00
API 5l Gr X60 60,000.00 75,000.00
API 5l Gr X65 65,000.00 77,000.00
API 5l Gr X70 70,000.00 82,000.00

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