ASTM A312 TP316 / TP316L Stainless Steel Seamless Pipe For Power Generation

In the harsh power generation environment characterized by high pressure, temperature fluctuations, and persistent corrosion risks, ASTM A312 TP316 and TP316L stainless steel seamless pipes are the ideal choice. ASTM A312 TP316 austenitic stainless steel pipes offer excellent corrosion resistance, high-temperature strength, and weldability, and are widely used in conventional and nuclear power plant boilers, heat exchangers, condensers, and feedwater systems.

 

What is ASTM A312 TP316 / TP316L?

ASTM A312 is the standard specification for seamless, welded, and heavily cold-worked austenitic stainless steel pipe.

Among its most popular grades, TP316 and TP316L contain molybdenum, which significantly enhances their resistance to pitting and crevice corrosion compared to standard 304 stainless steel.

TP316: The standard carbon version, offering high strength and corrosion resistance.

TP316L: The low-carbon version, providing better resistance to intergranular corrosion after welding or stress relief processes.

 

GNEE supplies ASTM A312 TP316 / TP316L Stainless Steel Seamless Pipes. This material is an ultra-low carbon austenitic chromium-nickel-molybdenum stainless steel. Formed through hot rolling or cold drawing processes and subjected to solution annealing treatment, it resists acidic condensates, chlorides, and boiler feedwater impurities. It operates reliably at temperatures up to 870°C (1600°F), features an internally smooth surface free from oxide residues to reduce scaling and improve heat transfer efficiency in condensers and heat exchangers, and offers a long service life that reduces maintenance frequency in power plants.

ASTM A312 TP316 / TP316L Stainless Steel Pipe Specifications

Parameter	Description
Standard	ASTM A312 / ASME SA312
Grades	TP316, TP316L
Type	Seamless / Welded
Size Range	1/8" NB to 36" NB
Schedule	SCH 5S, 10S, 40S, 80S, 160S, XXS
Outer Diameter	6 mm – 914 mm
Wall Thickness	0.5 mm – 60 mm
Length	Single, Double Random & Cut Length
Finish	Annealed, Pickled, Polished, Bright Annealed
Form	Round, Square, Rectangular
End Type	Plain End / Beveled End / Threaded
Standards Equivalent	EN 10216-5, DIN 17456, JIS G3459

 

Chemical Composition Requirements

Element	Composition, % TP316	Composition, % TP316L
C	≤0.08	≤0.035
Mn	≤2.00	≤2.00
P	≤0.045	≤0.045
S	≤0.030	≤0.030
Si	≤1.00	≤1.00
Cr	16.0-18.0	16.0-18.0
Ni	10.0-14.0	10.0-14.0
Mo	2.00-3.00	2.00-3.00

 

Mechanical Properties

Tensile Requirements	TP316	TP316L
Tensile Strength min. MPa [ksi]	515 [75]	485 [70]
Yield Strength min. MPa [ksi]	205 [30]	170 [25]
Elongation in 2", min, % (*L)	35	35
Elongation in 2", min, %(*T)	25	25

*L: longitudinal elongation; *T: transverse elongation.

 

Sizes, Dimensions & Tolerances

NPS	*t/D	Tolerance, % from Nominal
1/8"~2.5"	All	+20.0	-12.5
3"~18"	≤5%	+22.5	-12.5
3"~18"	>5%	+15.0	-12.5
≥20" Wld.	All	+17.5	-12.5
≥20" smls	≤5%	+22.5	-12.5
≥20" smls	>5%	+15.0	-12.5

 

Inspection & Tests
Visual examination, dimensional inspection, PMI chemical analysis, tensile test, flattening test, bend test, eddy-current test, etching test, radiographic examination (for welded pipes), intergranular corrosion test (upon request). 

 

Ordering & Quotation

To request a quote, please specify:

Material grade (TP316 or TP316L)

Size (OD, thickness, length)

Surface finish (2B, BA, polished, etc.)

Quantity and delivery destination

Email: info@gneestainless.com

 

Packaging & Delivery

Moisture-proof wrapping with plastic film

Wooden box or steel pallet protection

Heat number and grade clearly marked

Seaworthy export packing for long-distance transport