DIWA353 13MnNiMo54 Steel Plate Applications & Ordering Guide

DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54] 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 DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54] with EN 10204 mill test certificates.

Typical Applications and Service Conditions

DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54] 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 Normalized and tempered (typical) should be stated explicitly on the purchase order.

Industry Use Cases

Pressure equipment and process: shells, heads, and related platework when drawings name DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54]. 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 (DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54])

BHW35 is a Chinese boiler-plate trade/mill grade commonly mapped to 13MnNiMo5-4 / DIWA 353. Confirm the ordered mill specification and MTC analysis - do not treat the trade name alone as a design code. Queue key DIWA353-13MnNiMo54 maps to the same DIWA 353 / 13MnNiMo5-4 / BHW35 family tables.

Element / rule	Requirement
C, max	0.15 (heat; product often <=0.17)
Si	0.10-0.50
Mn	1.00-1.60
P, max	0.020
S, max	0.010
Ni	0.60-1.00
Mo	0.20-0.40
Cr	0.20-0.40
Nb, max	0.020
Al total, min	0.015

Mechanical Properties - Supporting Data (DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54])

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

Property	Requirement
Yield min (t<=50 mm typical)	400 MPa
Yield min (50 < t <= 100 mm typical)	390 MPa
Tensile Rm (typical N+T)	570-740 MPa
Elongation A, min (typical)	18%
Delivery	Normalized and tempered

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 / Dil	13MnNiMo5-4 / DIWA 353	Common European mill mapping
GB	13MnNiMoR family	Chinese pressure-vessel naming - confirm edition
Related	15NiCuMoNb5-6-4 / WB36	Different Ni-Cu-Mo-Nb boiler family - not interchangeable

Frequently Asked Questions

Where is DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54] typically applied?

DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54] 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 DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54]?

Design temperature and pressure, toughness or creep allowables, weldability, corrosion or process media, and the governing code edition drive selection. Delivery condition Normalized and tempered (typical) must align with the ordered specification.

Can a near-equivalent replace DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54] 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 DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54].

What fabrication notes matter for DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54]?

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 DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54].

How should I RFQ DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54] plate from Gangsteel for a project?

Send DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54], 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 DIWA 353 / 13MnNiMo5-4 (BHW35 family) [queue key DIWA353-13MnNiMo54], 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.