SS317L Supplier Steel Plate Applications & Ordering Guide

ASTM A240 / ASME SA240 Type 317L (UNS S31703) [queue key SS317L-Supplier] is specified for industrial fabrications where the drawing or material list names this grade. This applications page explains where the grade is used, what service conditions drive selection, and which certificate details belong on the purchase order. Gangsteel supplies ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier] with EN 10204 mill test certificates.

Typical Applications and Service Conditions

ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier] plate is ordered for pressure equipment, process vessels, heat-exchanger related fabrications, structural members under the governing code, and project packages that call the grade by name. Match the mill test certificate grade mark to the calculation sheet; do not treat near-equivalents as automatic substitutes.

Service drivers include the design temperature and pressure of the governing code (ASME, EN/PED, class society, or project specification), weld procedure qualification needs, toughness or creep allowables where applicable, and inspection scope. Delivery condition Solution annealed should be stated explicitly on the purchase order.

Industry Use Cases

Pressure equipment and process: shells, heads, and related platework when drawings name ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier]. Power and energy: boiler and heat-recovery fabrications under the ordered edition. Marine / offshore (when classed): only when the society material list names this exact grade stamp. Always keep heat-number traceability on cut pieces.

Chemical Composition - Supporting Data (ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier])

Heat / cast analysis. Low C for as-welded corrosion resistance; Mo 3-4%. Supplier/landing page key SS317L-Supplier uses A240 317L tables.

Element	Min %	Max % / requirement
C	-	<=0.030
Mn	-	<=2.00
Si	-	<=0.75
P	-	<=0.045
S	-	<=0.030
Cr	18.0	20.0
Ni	11.0	15.0
Mo	3.00	4.00
N	-	<=0.10

Mechanical Properties - Supporting Data (ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier])

Confirm thickness, specimen orientation, and any supplementary impact, UT, or hardness requirements on the PO.

Property	Requirement
Tensile strength, min	515 MPa (75 ksi)
Yield strength (0.2% offset), min	205 MPa (30 ksi)
Elongation in 50 mm, min	40%
Hardness, max	217 HBW / 95 HRB
Delivery condition	Solution annealed

Related / Near-Equivalent Grades

Near-equivalents are for cross-reference only. They are not automatic code substitutes. Substitution requires engineer approval and matching certificate scope.

System	Grade	Note
ASME	SA240 Type 317L	ASME twin
ASTM	Type 317 / 316L	Related Mo austenitics
UNS	S31703	317L designation

Frequently Asked Questions

Where is ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier] typically applied?

ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier] is applied where design documents, class material lists, or purchaser specs name this grade for pressure, process, structural, or marine fabrications as applicable. Match the MTC marking to the drawing.

What service conditions drive selection of ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier]?

Design temperature and pressure, toughness or creep allowables, weldability, corrosion or process media, and the governing code edition drive selection. Delivery condition Solution annealed must align with the ordered specification.

Can a near-equivalent replace ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier] on an applications drawing?

Not without redesign and written approval. Near-equivalents differ in chemistry, heat treatment, impact temperature, or product form. Commercial swaps create non-conformance when the dossier names ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier].

What fabrication notes matter for ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier]?

Use approved WPS/PQR packages for the thickness and filler, control heat input, and preserve heat-number traceability on cut pieces. State any supplementary UT, PMI, or impact tests on the purchase order.

What certificate and marking should an applications PO demand?

EN 10204 3.1 is standard; 3.2 when a purchaser-appointed inspector witnesses tests. The MTC should show heat analysis, tensile results, delivery condition, and heat number aligned with ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier].

How should I RFQ ASTM A240 / ASME SA240 Type 317L [queue key SS317L-Supplier] plate from Gangsteel for a project?

Send ASTM A240 / ASME SA240 Type 317L (UNS S31703) [queue key SS317L-Supplier], thickness x width x length (or nesting list), quantity, delivery condition, optional NDT/PMI, certificate type, destination, and any dual-mark needs. Note the end use when special flatness or cut-to-size packaging is required.

Ordering and Mill Certificates

State grade ASTM A240 / ASME SA240 Type 317L (UNS S31703) [queue key SS317L-Supplier], dimensions, quantity, delivery condition, optional NDT/PMI, and certificate (EN 10204 3.1 standard; 3.2 when third-party inspection is ordered). Gangsteel supplies export plate and related products with mill test certificates. Contact Gangsteel for stock and mill production RFQs.