What is ASTM A249 material equivalent to?

 

What Is ASTM A249 Material Equivalent To?

ASTM A249 covers welded (not seamless) stainless steel tubes made from austenitic grades. The equivalent materials vary based on the specific grade (e.g., TP304, TP316, TP321). Here's a breakdown of common ASTM A249 grades and their equivalent materials in global standards:

ASTM A249 Grade
TP304	S30400	EN 1.4301 / X5CrNi18-10	SUS 304	18/8 Stainless Steel
TP304L	S30403	EN 1.4307 / X2CrNi18-9	SUS 304L	Low-carbon 304
TP316	S31600	EN 1.4401 / X5CrNiMo17-12-2	SUS 316	Mo-enhanced 304
TP316L	S31603	EN 1.4404 / X2CrNiMo17-12-2	SUS 316L	Low-carbon 316
TP321	S32100	EN 1.4541 / X6CrNiTi18-10	SUS 321	Ti-stabilized 304
TP347	S34700	EN 1.4550 / X6CrNiNb18-10	SUS 347	Nb-stabilized 304

 

What is the chemical composition of A249?

ASTM A249 Dimensional Tolerances

<= 1/2 inch (12.7 mm)	± 0.005 inch (0.13 mm)
> 1/2 inch to 1 inch	± 0.005 inch (0.13 mm)
> 1 inch to 1-1/2 inch	± 0.006 inch (0.15 mm)
> 1-1/2 inch to 2 inch	± 0.008 inch (0.20 mm)
> 2 inch	± 0.010 inch (0.25 mm)

What is ASTM A249 used for?

→ For heat transfer applications like heat exchangers and condensers.

 

Is ASTM A249 seamless or welded?

→ Welded, often cold-worked to meet dimensional tolerances.

 

What is the difference between A249 and A269?

→ A249 is for heat exchanger service and includes specific testing (e.g. flattening), while A269 is for general corrosion resistance.

 

Is TP316L in A249 the same as in A312?

→ Yes, both use the same material chemistry, but A249 is for and A312 is for .