What is the equivalent material of astm a312?

ASTM A312 is a widely used specification covering seamless and welded austenitic stainless steel pipes intended for high-temperature and general corrosive service. If you're involved in global sourcing, engineering, or procurement, you may often wonder:What is the equivalent material of ASTM A312 in other international standards?This article explains ASTM A312's global equivalents, chemical composition, and application scenarios to help engineers and buyers make informed decisions.

Overview of ASTM A312 Standard

ASTM A312 applies to austenitic stainless steel pipes used in industries such as:

Oil & gas

Chemical processing

Food and beverage

Power generation

Pharmaceutical

Equivalent Materials of ASTM A312

ASTM A312 Grade	EN (Europe)	DIN (Germany)	JIS (Japan)	GB (China)
TP304	EN 1.4301 / X5CrNi18-10	1.4301	SUS304	06Cr19Ni10
TP304L	EN 1.4307 / X2CrNi18-9	1.4307	SUS304L	022Cr19Ni10
TP316	EN 1.4401 / X5CrNiMo17-12-2	1.4401	SUS316	06Cr17Ni12Mo2
TP316L	EN 1.4404 / X2CrNiMo17-12-2	1.4404	SUS316L	022Cr17Ni12Mo2

Note: While these are considered equivalent materials, actual mechanical properties and testing requirements may differ slightly depending on the standard.

Chemical Composition of ASTM A312

Q: Is SUS316L the same as ASTM A312 TP316L?
A: SUS316L is the Japanese equivalent of TP316L, but minor differences in standards and tolerances may apply.

Q: Can I use EN 1.4404 instead of A312 TP316L?
A: Yes, EN 1.4404 is generally accepted as the European equivalent to TP316L, especially for pressure and corrosive applications.

ASTM A312 vs ASTM A269: Key Differences

ASTM A312 covers seamless and welded stainless steel pipes intended for high-temperature and general corrosive service, typically used in process piping, oil and gas, and chemical industries. In contrast, ASTM A269 specifies seamless and welded austenitic stainless steel tubing primarily for general instrumentation and low- to moderate-pressure applications, often in the food, beverage, and pharmaceutical industries. A312 pipes generally have stricter mechanical property requirements and heavier wall thicknesses, while A269 focuses more on precise dimensional tolerances and surface finish quality.

Feature	ASTM A312	ASTM A269
Product Type	Seamless or welded pipes	Seamless or welded tubes
Primary Use	High-temperature and general corrosive service in pressure piping systems	General service including instrumentation, condenser, and heat exchanger tubing
Wall Thickness Tolerance	Typically follows ASME B36.19M (pipe schedule standards)	Tighter tolerances suitable for precision tubing
Mechanical Requirements	Designed for high-pressure and high-temperature applications	Moderate pressure, often non-critical applications
Hydrostatic Testing	Mandatory	Optional (unless specified by purchaser)
Surface Finish	Standard industrial finish	Often requires smooth or polished finish (ID/OD)
Applications	Oil & gas, chemical processing, power generation	Food & beverage, pharmaceutical, instrumentation, lab use
Grades Commonly Used	TP304, TP304L, TP316, TP316L	TP304, TP304L, TP316, TP316L
Pressure Rating	Typically higher	Lower compared to pipe standards
Testing & Nondestructive Exam	NDT & mechanical tests are required	Eddy current or ultrasonic testing often required for thin-wall tubing