S30153 Steel Plate Applications & Ordering Guide

UNS S30153 / ASTM A240 Type 301LN (EN 1.4318) 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 UNS S30153 / ASTM A240 Type 301LN (EN 1.4318) with EN 10204 mill test certificates.

Typical Applications and Service Conditions

UNS S30153 / ASTM A240 Type 301LN (EN 1.4318) 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; cold-rolled tempers when ordered should be stated explicitly on the purchase order.

Industry Use Cases

Pressure equipment and process: shells, heads, and related platework when drawings name UNS S30153 / ASTM A240 Type 301LN (EN 1.4318). 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 (UNS S30153 / ASTM A240 Type 301LN (EN 1.4318))

Heat/cast analysis for UNS S30153 (301LN). Nitrogen strengthens while low carbon supports weldability vs classic 301.

Element	Min %	Max % / requirement
C	-	<=0.030
Si	-	<=1.00
Mn	-	<=2.00
P	-	<=0.045
S	-	<=0.030
Cr	16.0	18.0
Ni	6.0	8.0
N	0.07	0.20

Mechanical Properties - Supporting Data (UNS S30153 / ASTM A240 Type 301LN (EN 1.4318))

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

Property	Requirement
Tensile strength, min (A240 annealed)	550 MPa
Yield strength (0.2% offset), min	240 MPa
Elongation in 50 mm, min	45%
Hardness, max (annealed)	241 HBW
Delivery	Solution annealed (unless temper ordered)

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
EN	1.4318 / X2CrNiN18-7	European 301LN
AISI	301LN	Common name
ASTM	Type 301	Higher C classic 301 - not identical

Frequently Asked Questions

Where is UNS S30153 / ASTM A240 Type 301LN (EN 1.4318) typically applied?

UNS S30153 / ASTM A240 Type 301LN (EN 1.4318) 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 UNS S30153 / ASTM A240 Type 301LN (EN 1.4318)?

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

Can a near-equivalent replace UNS S30153 / ASTM A240 Type 301LN (EN 1.4318) 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 UNS S30153 / ASTM A240 Type 301LN (EN 1.4318).

What fabrication notes matter for UNS S30153 / ASTM A240 Type 301LN (EN 1.4318)?

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 UNS S30153 / ASTM A240 Type 301LN (EN 1.4318).

How should I RFQ UNS S30153 / ASTM A240 Type 301LN (EN 1.4318) plate from Gangsteel for a project?

Send UNS S30153 / ASTM A240 Type 301LN (EN 1.4318), 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 UNS S30153 / ASTM A240 Type 301LN (EN 1.4318), 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.