1.4404 stainless steel pipe ASTM A312 standard

1.4404 stainless steel, also known as AISI 316L or X2CrNiMo17-12-2, is a low-carbon molybdenum-bearing austenitic stainless steel. It is widely used for pressure piping applications due to its excellent corrosion resistance, weldability, and high purity. When manufactured under the ASTM A312 standard, 1.4404 pipes meet strict requirements for seamless and welded stainless steel pipes intended for high-temperature and general corrosive service.

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🔍 What is ASTM A312?

ASTM A312 is the standard specification for seamless, welded, and heavily cold-worked austenitic stainless steel pipes intended for high-temperature and corrosive environments.

Key features of ASTM A312:

Applicable to grades including 304, 304L, 316, 316L (1.4404), etc.

Covers both seamless and welded pipe types.

Includes hydrostatic testing, non-destructive examination, and dimensional tolerances.

Typical applications: chemical processing, oil & gas, power generation, food industry, and marine systems.

🌐 Equivalent Standards for 1.4404 Stainless Steel

Region	Standard
EN	1.4404 / X2CrNiMo17-12-2
ASTM / AISI	316L
UNS	S31603
JIS	SUS316L
ISO	X2CrNiMo17-12-2

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🔩 Chemical Composition of 1.4404 (316L) Stainless Steel (per EN 10088-1)

Element	Symbol	Content (wt.%)
Carbon	C	≤ 0.030
Silicon	Si	≤ 1.00
Manganese	Mn	≤ 2.00
Phosphorus	P	≤ 0.045
Sulfur	S	≤ 0.015
Chromium	Cr	16.5–18.5
Nickel	Ni	10.0–13.0
Molybdenum	Mo	2.0–2.5
Nitrogen	N	≤ 0.11
Iron	Fe	Balance

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📏 Common Dimensions and Sizes (per ASTM A312)

Outer Diameter (OD): 1/8" to 36" (6mm to 914mm)

Wall Thickness (SCH): SCH 5S, 10S, 40S, 80S, 160, XXS

Length: Single random (SRL), double random (DRL), or cut-to-length

Surface Finish: Annealed and pickled, bright annealed, or polished

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✅ Advantages of 1.4404 Stainless Steel Pipes

Superior corrosion resistance in chloride-containing environments (e.g., seawater, chemical tanks)

Low carbon content minimizes risk of intergranular corrosion after welding

Excellent mechanical properties in both ambient and elevated temperatures

Long service life, reducing total lifecycle cost

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🏗️ Typical Applications

Heat exchangers and condensers

Water treatment and desalination systems

Food-grade and pharmaceutical piping

Marine piping and offshore platforms

Chemical and petrochemical processing pipelines

 

📦Availability

GNEE is a stock supply of 1.4404 stainless steel tubes in accordance with ASTM A312 in a full range of standard sizes and custom production is also available. Both seamless and welded forms are available from major manufacturers and distributors worldwide.