ASTM A213 UNS S31703 Boiler Tubing

1.Standard: ASTM A213, ASME SA213
2.OD Size: 3.00 mm - 219.10 mm
3.Thickness: 0.40 mm - 12.70 mm
4.Equivalent：UNS S31703, WNR.1.4438, AISI 317L

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Product Introduction

Alloy 317L boiler tubing is a type of stainless steel tubing manufactured according to the ASTM A213 standard. ASTM A213 UNS S31703 Boiler Tubing is specifically engineered for use in boiler systems and heat exchangers, where resistance to high temperatures and corrosive environments is essential. Enhanced molybdenum content provides superior resistance to corrosion compared to other austenitic stainless steels like 316L. The 'L' in 317L indicates a low carbon content, which enhances its resistance to sensitization during welding and ensures superior corrosion resistance in as-welded structures.

ASME SA213 UNS S31703 Boiler Tubing Applications:

Chemical Processing Plants
Petrochemical Industry
Power Generation
Boiler And Heat Exchanger
Marine Environments

ASTM A213 TP317L Stainless Seamless Tube Specifications

Standard	ASTM A213, ASME SA213
Dimensions	ASTM, ASME, and API
Size	1/2" OD - 12" OD
OD	3.00 - 219.10 mm
Thickness	0.40 - 12.70 mm
Length	Single, Double Random & Cut Length
Form	Round Tubes, Square Tubes, Rectangular Tubes, "U" Shape, Hydraulic Tubes
Surface Finish	BA, 2B, No.4, No.1, No.3, No.8, 8K, HL

ASTM A213 UNS S31703 Boiler Tubing Mechanical Properties

Properties	Metric	Imperial
Tensile strength	595 MPa	86300 psi
Yield strength	260 MPa	37700 psi
Modulus of elasticity	200 GPa	29000 ksi
Poisson's ratio	0.27-0.30	0.27-0.30
Elongation at break (in 50 mm)	55%	55%
Hardness, Rockwell B	85	85

ASTM A213 Standards and Specifications

ASME SA213 is the primary standard governing the manufacture of 317L boiler tubing. This specification ensures that the tubing meets rigorous requirements for mechanical properties, chemical composition, and dimensional accuracy. Key aspects include:

Dimensional Tolerances: Precise measurements to fit seamlessly into existing systems.
Mechanical Properties: Adequate tensile and yield strength to withstand operational pressures.
Surface Finish: Smooth surface to minimize corrosion initiation sites.