The difference between 304 and 316 stainless steel pipes

Jul 23, 2025

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If you're sourcing stainless steel piping for industrial, marine, or hygienic applications, one of the most common questions is:What's the difference between 304 and 316 stainless steel pipes? While both belong to the austenitic stainless steel family, 304 and 316 offer distinct advantages depending on your specific operating conditions. This article breaks down the key differences in chemical composition, corrosion resistance, cost, and application suitability, helping you make an informed purchasing decision.

What is 304 stainless steel pipe?

AISI 304 stainless steel pipe is a low-carbon austenitic stainless steel pipe with 18-20% chromium and 8-10.5% nickel as the core components. It belongs to the 18-8 classic grade (corresponding to EN 1.4301). It is widely used in general corrosive environments at normal temperature and pressure. It is a general-purpose stainless steel pipe with extremely high cost performance in industrial and civil fields.

What is 316 stainless steel pipe?

AISI 316 stainless steel pipe is an austenitic stainless steel pipe with 2-3% molybdenum added to 304 (corresponding to EN 1.4401/1.4404). Its temperature resistance and mechanical properties are slightly better than 304. It is suitable for chemical and pharmaceutical pipelines, seawater desalination systems, marine engineering and other scenes.

difference between 304 and 316 stainless steel pipe

Performance
304 Austenitic alloy steel pipe is the most common steel type. As a versatile metal, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. Good hot workability such as stamping and bending. No heat treatment hardening phenomenon (non-magnetic, use temperature -196℃~800℃).

Due to the addition of molybdenum, ss 316 pipe has particularly good corrosion resistance, atmospheric corrosion resistance, and high temperature strength. Can be used in harsh conditions. Excellent work hardenability (non-magnetic).

Corrosion Resistance
304 stainless pipe performs excellently in general atmospheric, food processing, and mildly acidic environments.ss 316 steel pipe with added molybdenum, provides superior resistance to chlorides, seawater, and industrial solvents, making it ideal for marine, chemical, and coastal environments.

Cost
316 stainless steel tubing is typically 20–30% more expensive than 304 due to the addition of molybdenum and higher nickel content.However, the lifecycle cost of 316 is often lower in corrosive environments due to reduced maintenance, repairs, and longer service life.

Chemical composition

Grade	C	Si	Mn	P	S	N	Cr	Ni	Mo
304	0.07	1.00	2.00	0.045	0.015	0.10	17.5 - 19.5	8.0 - 10.5	-
316	0.07	1.00	2.00	0.045	0.015	0.10	16.5 - 18.5	10.0 - 13.0	2.0 - 2.5

Mechanical Properties (Annealed Condition)

Name	304 material	316 material
Yield strength	≥205	≥175
Tensile strength	≥520	≥480
Elongation (%)	≥40	≥40
Hardness	HB≤187, HRB≤90, ≤200	HB≤187, HRB≤90, ≤200
Density	7.93 g/cm³	7.87 g/cm³
Resistivity	0.73Ω.mm²/meter	0.71Ω.mm²/meter
Melting point	1398-1420℃	1398-1420℃

Can 304 replace 316?
It can be used in ordinary environment, but it will shorten the life and even cause safety hazards in high chlorine and high acid environment.

What is the difference between 304 and 316 piping?

Choosing between 304 and 316 stainless steel pipes depends on your specific environment, budget, and performance needs. If you're working in corrosive, coastal, or chemical-heavy conditions, 316 is the optimal long-term solution. For standard indoor or general-purpose use, 304 offers excellent value.

GNEE Offers High-Quality 304 & 316 Stainless Steel Pipes

At GNEE, we supply a full range of 304 and 316 stainless steel pipes, meeting international standards such as ASTM A312, EN 10216-5, JIS G3459, and more.