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DIWA 393 (EN 1.6311)

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Description

DIWA 393 is a weldable fine grained steel for higher temperature service. It is characterised by high 0.2 % proof stress at elevated temperatures. DIWA 393 is produced using basic oxygen steelmaking process. Its properties are achieved by water quenching and tempering .

DIWA 393 is applied as plate or formed part for boilers and pressure vessels operating at temperatures of - 20 °C to 400 °C

DIWA 393 / 20MnMoNi4-5, Material No. 1.6311, is standardized in EN 10028, part 2 and approved in accordance with VdTÜV-material data sheet 440/1 for supervised installations in thicknesses of 30 up to 250 mm.

This material data sheet applies to heavy plates with thicknesses from 30 to 250 mm.

Sampling, testing method and tests are in accordance with the provisions in EN 10028 and VdTÜV material data sheet 440/1.

Related Standards

Equivalent Materials

This material data has been provided by Dillinger.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

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DILLINGER

MANUFACTURER, PROCESSOR AND DISTRIBUTOR

Additional services:

Our experienced engineers are on hand to provide our customers with product-related advisory services, such as help with steel selection, in-depth discussion on specifications or processing issues. In addition, you find broad digital information services in our E-Service portal. You have access to all order related documents such as current order status, certificates, invoices, delivery history. A product finder and feasibility calculations help you selecting the suitable steel for your need. With the E-Connect App you identify quickly and reliable a Dillinger heavy plate, and get all certificate information and test results. The chemical analysis can be transferred to standard calculation tools e.g. for the optimum preheating temperature for flame cutting.

Applications

Fluid Systems

Fluid Storage

Fluid Storage General

Energy

Burners & Boilers

Boilers & Heat Exchangers

Chemical Industry

Equipment For Chemical Industry

Heat Exchangers

Hydrogen Technologies

Metallurgy

Ferrous Metals

Steels

Reaction Vessels

Reaction Columns

Other Equipment For The Chemical Industry

Iron & Steel Products

Steels For Pressure Purposes

Flat Steel Products & Semi-Products

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Materials by this supplier

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DIFENDER 450

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Properties

Mechanical

Property	Temperature	Value	Testing Standard	Comment
Charpy impact energy, V-notch	-20 °C	19 J Show Supplier Material materials with Charpy impact energy, V-notch of 19 J	EN 10045-1	lowest individual value \| transverse specimens
	-20 °C	27 J Show Supplier Material materials with Charpy impact energy, V-notch of 27 J	EN 10045-1	average
	0 °C	28 J Show Supplier Material materials with Charpy impact energy, V-notch of 28 J	EN 10045-1	lowest individual value \| transverse specimens
	0 °C	40 J Show Supplier Material materials with Charpy impact energy, V-notch of 40 J	EN 10045-1	average \| transverse specimens
	20 °C	35 J Show Supplier Material materials with Charpy impact energy, V-notch of 35 J	EN 10045-1	lowest individual value \| transverse specimens
	20 °C	50 J Show Supplier Material materials with Charpy impact energy, V-notch of 50 J	EN 10045-1	average \| transverse specimens
Elongation		18 % Show Supplier Material materials with Elongation of 18 %	EN 10002-1	min. for plate thickenss t ≤ 250 mm \| transverse specimens (ambient temp.), A5
Tensile strength		560 - 700 MPa Show Supplier Material materials with Tensile strength of 560 - 700 MPa	EN 10002-1	for plate thickness 150 < t ≤ 250 mm \| transverse specimens (ambient temp.)
		570 - 710 MPa Show Supplier Material materials with Tensile strength of 570 - 710 MPa	EN 10002-1	for plate thickness 60 < t ≤ 150 mm \| transverse specimens (ambient temp.)
		590 - 750 MPa Show Supplier Material materials with Tensile strength of 590 - 750 MPa	EN 10002-1	for plate thickness t ≤ 40 mm \| transverse specimens (ambient temp.)
		590 - 730 MPa Show Supplier Material materials with Tensile strength of 590 - 730 MPa	EN 10002-1	for plate thickness 40 < t ≤ 60 mm \| transverse specimens (ambient temp.)
Yield strength		400 MPa Show Supplier Material materials with Yield strength of 400 MPa	EN 10002-1	min. ReH for plate thickness 150 < t ≤ 250 mm \| transverse specimens (ambient temp.)
		440 MPa Show Supplier Material materials with Yield strength of 440 MPa	EN 10002-1	min. ReH for plate thickness 100 < t ≤ 150 mm \| transverse specimens (ambient temp.)
		450 MPa Show Supplier Material materials with Yield strength of 450 MPa	EN 10002-1	min. ReH for plate thickness 60 < t ≤ 100 mm \| transverse specimens (ambient temp.)
		460 MPa Show Supplier Material materials with Yield strength of 460 MPa	EN 10002-1	min. ReH for plate thickness 40 < t ≤ 60 mm \| transverse specimens (ambient temp.)
		470 MPa Show Supplier Material materials with Yield strength of 470 MPa	EN 10002-1	min. ReH for plate thickness t ≤ 40 mm \| transverse specimens (ambient temp.)
	100 °C	381 MPa Show Supplier Material materials with Yield strength of 381 MPa	EN 10002-5	min. Rp0.2 for plate thickness 150 < t ≤ 250 mm \| transverse specimens
	100 °C	419 MPa Show Supplier Material materials with Yield strength of 419 MPa	EN 10002-5	min. Rp0.2 for plate thickness 100 < t ≤ 150 mm \| transverse specimens
	100 °C	429 MPa Show Supplier Material materials with Yield strength of 429 MPa	EN 10002-5	min. Rp0.2 for plate thickness 60 < t ≤ 100 mm \| transverse specimens
	100 °C	438 MPa Show Supplier Material materials with Yield strength of 438 MPa	EN 10002-5	min. Rp0.2 for plate thickness 40 < t ≤ 60 mm \| transverse specimens
	100 °C	448 MPa Show Supplier Material materials with Yield strength of 448 MPa	EN 10002-5	min. Rp0.2 for plate thickness t ≤ 40 mm \| transverse specimens
	200 °C	367 MPa Show Supplier Material materials with Yield strength of 367 MPa	EN 10002-5	min. Rp0.2 for plate thickness 150 < t ≤ 250 mm \| transverse specimens
	200 °C	404 MPa Show Supplier Material materials with Yield strength of 404 MPa	EN 10002-5	min. Rp0.2 for plate thickness 100 < t ≤ 150 mm \| transverse specimens
	200 °C	413 MPa Show Supplier Material materials with Yield strength of 413 MPa	EN 10002-5	min. Rp0.2 for plate thickness 60 < t ≤ 100 mm \| transverse specimens
	200 °C	423 MPa Show Supplier Material materials with Yield strength of 423 MPa	EN 10002-5	min. Rp0.2 for plate thickness 40 < t ≤ 60 mm \| transverse specimens
	200 °C	432 MPa Show Supplier Material materials with Yield strength of 432 MPa	EN 10002-5	min. Rp0.2 for plate thickness t ≤ 40 mm \| transverse specimens
	300 °C	353 MPa Show Supplier Material materials with Yield strength of 353 MPa	EN 10002-5	min. Rp0.2 for plate thickness 150 < t ≤ 250 mm \| transverse specimens
	300 °C	389 MPa Show Supplier Material materials with Yield strength of 389 MPa	EN 10002-5	min. Rp0.2 for plate thickness 100 < t ≤ 150 mm \| transverse specimens
	300 °C	398 MPa Show Supplier Material materials with Yield strength of 398 MPa	EN 10002-5	min. Rp0.2 for plate thickness 60 < t ≤ 100 mm \| transverse specimens
	300 °C	406 MPa Show Supplier Material materials with Yield strength of 406 MPa	EN 10002-5	min. Rp0.2 for plate thickness 40 < t ≤ 60 mm \| transverse specimens
	300 °C	415 MPa Show Supplier Material materials with Yield strength of 415 MPa	EN 10002-5	min. Rp0.2 for plate thickness t ≤ 40 mm \| transverse specimens
	350 °C	342 MPa Show Supplier Material materials with Yield strength of 342 MPa	EN 10002-5	min. Rp0.2 for plate thickness 150 < t ≤ 250 mm \| transverse specimens
	350 °C	377 MPa Show Supplier Material materials with Yield strength of 377 MPa	EN 10002-5	min. Rp0.2 for plate thickness 100 < t ≤ 150 mm \| transverse specimens
	350 °C	385 MPa Show Supplier Material materials with Yield strength of 385 MPa	EN 10002-5	min. Rp0.2 for plate thickness 60 < t ≤ 100 mm \| transverse specimens
	350 °C	394 MPa Show Supplier Material materials with Yield strength of 394 MPa	EN 10002-5	min. Rp0.2 for plate thickness 40 < t ≤ 60 mm \| transverse specimens
	350 °C	402 MPa Show Supplier Material materials with Yield strength of 402 MPa	EN 10002-5	min. Rp0.2 for plate thickness t ≤ 40 mm \| transverse specimens
	400 °C	327 MPa Show Supplier Material materials with Yield strength of 327 MPa	EN 10002-5	min. Rp0.2 for plate thickness 150 < t ≤ 250 mm \| transverse specimens
	400 °C	359 MPa Show Supplier Material materials with Yield strength of 359 MPa	EN 10002-5	min. Rp0.2 for plate thickness 100 < t ≤ 150 mm \| transverse specimens
	400 °C	367 MPa Show Supplier Material materials with Yield strength of 367 MPa	EN 10002-5	min. Rp0.2 for plate thickness 60 < t ≤ 100 mm \| transverse specimens
	400 °C	375 MPa Show Supplier Material materials with Yield strength of 375 MPa	EN 10002-5	min. Rp0.2 for plate thickness 40 < t ≤ 60 mm \| transverse specimens
	400 °C	384 MPa Show Supplier Material materials with Yield strength of 384 MPa	EN 10002-5	min. Rp0.2 for plate thickness t ≤ 40 mm \| transverse specimens

Chemical properties

Property	Value	Comment
Aluminium	0.01 - 0.055 % Show Supplier Material materials with Aluminium of 0.01 - 0.055 %	product
	0.01 - 0.05 % Show Supplier Material materials with Aluminium of 0.01 - 0.05 %	heat
Carbon	0.13 - 0.25 % Show Supplier Material materials with Carbon of 0.13 - 0.25 %	product
	0.15 - 0.23 % Show Supplier Material materials with Carbon of 0.15 - 0.23 %	heat
Chromium	0.2 % Show Supplier Material materials with Chromium of 0.2 %	max. heat
	0.25 % Show Supplier Material materials with Chromium of 0.25 %	max. product
Copper	0.2 % Show Supplier Material materials with Copper of 0.2 %	max. heat
	0.25 % Show Supplier Material materials with Copper of 0.25 %	max. product
Iron	Balance
Manganese	0.95 - 1.6 % Show Supplier Material materials with Manganese of 0.95 - 1.6 %	product
	1 - 1.5 % Show Supplier Material materials with Manganese of 1 - 1.5 %	heat
Molybdenum	0.41 - 0.6 % Show Supplier Material materials with Molybdenum of 0.41 - 0.6 %	product
	0.45 - 0.64 % Show Supplier Material materials with Molybdenum of 0.45 - 0.64 %	heat
Nickel	0.35 - 0.85 % Show Supplier Material materials with Nickel of 0.35 - 0.85 %	product
	0.4 - 0.8 % Show Supplier Material materials with Nickel of 0.4 - 0.8 %	heat
Nitrogen	0.012 % Show Supplier Material materials with Nitrogen of 0.012 %	max. product
	0.015 % Show Supplier Material materials with Nitrogen of 0.015 %	max. heat
Phosphorus	0.02 % Show Supplier Material materials with Phosphorus of 0.02 %	max. heat
	0.025 % Show Supplier Material materials with Phosphorus of 0.025 %	max. product
Silicon	0.1 - 0.46 % Show Supplier Material materials with Silicon of 0.1 - 0.46 %	product
	0.15 - 0.23 % Show Supplier Material materials with Silicon of 0.15 - 0.23 %	heat
Sulfur	0.01 % Show Supplier Material materials with Sulfur of 0.01 %	max. heat
	0.013 % Show Supplier Material materials with Sulfur of 0.013 %	max. product
Vanadium	0.02 % Show Supplier Material materials with Vanadium of 0.02 %	max. product
	0.02 % Show Supplier Material materials with Vanadium of 0.02 %	max. heat

Technological properties

Property

Application areas

Boiler installations in accordance with Technical Rules TRD 101, EN 12952 etc. for temperatures up to 375 °C.

Pressure vessel installations in accordance with the AD 2000-Merkblätter series W and HP for temperatures of - 10 °C to 375 °C.

Delivery condtion

Unless otherwise agreed: water quenched and tempered

If the heat treatment is to be performed during processing, the plates can be delivered in the normalized condition, and in exceptional cases in the as rolled condition by special agreement before the order. In this case testing of the mechanical properties is provided on the basis of separately heat treated specimens.

Unless otherwise agreed, the general technical delivery requirements in accordance with EN 10021 apply.

Flame cutting and welding

DIWA 393 can be hot or cold formed and can be welded and flame cut according to the general procedures. The guidelines according to EN 1011 and VdTÜV-material data sheet 440/1 shall be observed. For the fabrication of pressure vessels in accordance with AD 2000 Merkblatt in the context of PED qualified welding consumables have to be applied. For other applications the use of qualified welding consumables is recommended.

General note

If special requirements, which are not listed in this material specification, are to be met by the steel due to its intended use or processing, these requirements are to be agreed before the order.

The indications in this data sheet are product descriptions. This data sheet is updated if necessary. The current version is available from the mill or as download at www.dillinger.de.

Heat Treatment

Quenching and tempering		Stress relieving
Austenitizing + quenching 870 to 940 °C After temperature achievement over the whole section cooling in water	Tempering 610 to 690 °C Holding time after temperature achievement over the whole section: 30 min, cooling in still air	580 - 620 °C
		thickness mm 30 > 30 ≤ 250	time min ≥ 30 ≥ 60
Heating and soaking in the temperature range between 580 and 620 °C. Temperature measurement at the part’s surface.

Generally the maximum stress relieving time shall be restricted to 150 min. If it exceeds 90 min or in case of repeated heat treatment the lower range of recommended temperatures shall apply. If stress relieving and tempering are joined together in one process, the tempering conditions apply.

The stress relieving temperature must not be higher than the tempering temperature applied at Dillinger Hütte. It should rather be situated in a sufficient distance of at least 30 °C below the tempering temperature in order to avoid a decrease of the mechanical properties. In many cases the stress relieving temperature during processing is determined by other influencing factors and therefore can not always be 30 °C below the tempering temperature applied at Dillinger Hütte. Therefore we recommend to consult us so that we can check the scheduled stress relieving conditions.

Temperatures and holding times are determined by the steel manufacturer as a function of the plate thickness and the chemical composition. In order to preserve the mechanical properties the fabricator should ensure that the subsequent heat treatments correspond to those applied by the manufacturer (indicated in the plate inspection document).

Hot forming

We point out to the fact that after hot forming a complete renewed quenching and tempering treatment in accordance with Dillinger Hütte indications has to be performed.

Other

Unless otherwise agreed the marking is carried out via steel stamps with at least the following information:

steel grade (DIWA 393 and/or 20MnMoNi45)

heat number

number of mother plate and individual plate

the manufacturer's symbol

inspectors' sign

Processing history

Fully killed steel with metallurgical treatment in the ladle and vacuum degassing on tank degassing unit.

Surface condition

Surface condition: Unless otherwise agreed, the provisions in accordance with class B2 of EN 10163 are applicable.

Testings

Tensile test at ambient temperature (transverse test specimens) in accordance with EN 10002-1

Hot tensile test (transverse test specimens) in accordance with EN 10002-5

The fulfilment of one of the three quality classes Z15, Z25 or Z35 in accordance with EN 10164 or similar standards can be stipulated on the order.

Sampling, testing method and tests are in accordance with the provisions in VdTÜV-material data sheet 440/1. Unless otherwise agreed the following tests are performed:

tests	acceptance unit
- Tensile test at ambient temperature, transverse specimens, acc. EN 10002-1 - Impact test Charpy-V, transverse specimens, at 0 °C acc. EN 10045-1	per rolled plate ≤ 15 m at one end, 1⁄4 width > 15 m at both ends, 1⁄4 width
Hot tensile test at elevated temperatures, transverse specimens, at 300 °C acc. EN 10002-5	per heat at one end, 1⁄4 width; for orders in accordance with AD 2000 W1 per heat and dimensional range
material identity test	per rolled plate
upon request: product analysis	per heat

Type/location of specimen:

Tensile test at ambient temperature	Hot tensile test	Impact test
plate thickness 30 mm: flat tensile test specimens with both rolled surfaces plate thickness > 30 mm: flat tensile test specimens with at least one rolled surface or cylindrical tensile test specimens with axis in 1⁄4 plate thickness	plate thickness 30 mm: flat tensile test specimens with both rolled surfaces plate thickness > 30 mm: cylindrical tensile test specimens with axis in 1⁄4 plate thickness	Plate thickness ≤ 40 mm: Charpy-V-test specimens near surface Plate thickness > 40 mm: Charpy-V-test specimens in 1⁄4 plate thickness

Sampling, testing method and tests are in accordance with the provisions in EN 10028 and VdTÜV material data sheet 440/1. The plates are delivered with inspection certificate 3.1 or 3.2 in accordance with EN 10204. The document type and, in case of inspection certificate 3.2, the inspection representative are to be stated on the order.

Tolerances

Unless otherwise agreed, tolerances are in accordance with EN 10029, with class B for the thickness and class N for the flatness.