Dillimax
Dillidur
DI-MC
Dicrest
Dillimax
DILLIMAX 690 T (Werkst.nr. 1.8928, according to DH specification 04-2003)
DILLIMAX 890 T (Werkst.nr. 1.8983, according to DH specification 04-2003)
DILLIMAX 965 T (Werkst.nr. 1.8933, according to DH specification 04-2003)
DILLIMAX 1100 (Werkst.nr. 1.8942, according to DH specification 02-2002)
A high strength, special steel, exceptionally well suited to trim constructions, intended to support heavy loads, for an attractive price. For example crane jibs, chassis, heavily loaded equipment, lift truck forks, etc.
Available from stock in four different strengths: from Dillimax 690 up to Dillimax 1100.
Due to the chemical composition and high-tech way of rolling and improving, Dillimax can be processed exceptionally well. Dillimax steels are suitable for welding and with the applicable welding conditions you can achieve a weld that combines the good mechanical properties with a favourable toughness.
Typical Values for thicknesses of 25 mm.
| DILLIMAX |
Min. yield point (MPa) |
Tensile strength (MPa) |
Min. elongation (%) 1 |
Charpy V –40ºC (J)
|
| 690 T |
690 |
770-940 |
14 |
30 / 27 |
| 890 T |
890 |
940-1100 |
12 |
30 / 27 |
| 965 T |
960 |
980-1150 |
12 |
30 / 27 |
| 1100 |
1100 |
1200-1500 |
10 |
30 / 27 |
Ex mill DILLIMAX is available in the range of 460 (MPa) up to 1100 (MPa). It is possible to offer to your own specifications We offer full technical support in this.
Dillidur
DILLIDUR 400 V with 400 HB (Werkst.nr. 1.8715, acc. to DH specification 07-2002)
DILLIDUR 450 V with 450 HB (Werkst.nr. 1.8720, acc. to DH specification 03-2001)
DILLIDUR 500 V with 500 HB (Werkst.nr. 1.8721, acc. to DH specification 03-2004)
DILLIDUR, the ideal steel for anything that has direct contact with sand, soil and stone; conveyor chutes, grabs, earth moving machinery, loading shovel blades, wear strips, dump trucks, buckets, loading floors etc.
The grades can be cold formed and processed exceptionally well and they are easy to machine with hard metal tools.
Due to excellent welding properties DILLIDUR is well suited for electrode-stickwelding, submerged arc welding and MAG and MIG welding. Depending on the grade and thickness only limited preheating is required.
The secret of the steel’s high degree of hardness and machinability is primarily its exceptional compact, fine grained crystal structure, which is caused by Dillinger Huttenwerke’s special water-hardening process. This is the most advanced hardening process in the world.
| DILLIDUR |
400 V |
450 V |
500 V |
| Hardness Brinell |
400 |
450 |
500 |
| Yield point (MPa) |
1000 |
1200 |
1300 |
| Tensile strenth (MPa) |
1300 |
1500 |
1650 |
| Min. elongation % |
12 |
11 |
8 |
| Charpy V (J) -20ºC |
50 |
40 |
25 |
Ex mill DILLIDUR is available in the range of 325 HB to 700. It is possible to offer to your own specifications. We offer full technical support in this process.
Download the PDF-file of this text here.
DI-MC
DI-MC 355 up to DI-MC 550
DI-MC is a thermo mechanically rolled, fine-grained construction steel which in the delivery condition, has a minimum yield strength of 355N/mm² up to 550 N/mm². Due to the chemical composition, these materials have a very low carbon equivalent and therefore excellent weldability. It is predominantly used in steel structures for which there are high demands for weldability.
Typical values of the carbon equivalent CE (IIW) and the PCM value (Ito) for plate thicknesses of about 30 mm:
Weldability
DI-MC has an excellent weldability if the general technical rules are observed (SEW 088). There is a less than minimal risk of cold cracking for DI-MC 355, generally regardless of plate thickness, preheating is not necessary for flame cutting and/or welding. The low content of carbon and other elements leads to favourable toughness properties in the heat-affected-zone, even with high heat inputs. Even for DI-MC 460 the risk of cold cracking is minimal.
Available from stock in standard trade dimensions in thicknesses from 15 mm up to 100 mm (depending on the grade and strength).
Ex mill DI-MC is available in the range of 355 (MPa) up to 550 (MPa). It is possible to offer to your own specifications. We offer full technical support in this process.
Download the PDF-file of this text here.
Dicrest
ASTM/ASME A/SA 516 DICREST 5/10/15
Fine grained pressure vessel steel adapted to sour service conditions.
The HIC resistance of DICREST steels is verified in the HIC test in accordance with NACE TM 0284-03. The test can be performed with test solution A or B. The following variants can be supplied:
Note: The values are only valid for the normalized+stress relieved (PWHT) condition.
a) with test solution A (pH ˜ 3):
| Acceptance criteria |
Crack length ratio % |
Crack thickness ratio % |
Crack sensitivity ratio % |
| DICREST 5 |
= 5 |
= 1.5 |
= 0.5 |
| DICREST 10 |
= 10 |
= 3 |
= 1 |
| DICREST 15 |
= 15 |
= 5 |
= 2 |
b) with test solution B ( pH ˜ 5):
| Acceptance criteria |
Crack length ratio % |
Crack thickness ratio % |
Crack sensitivity ratio % |
| DICREST 15 |
= 0.5 |
= 0.1 |
= 0.05 |
For DICREST 15, the requested test solution is to be indicated on the inquiry and on the order.
HIC Test
Unless otherwise agreed the HIC test is performed at DILLINGER HÜTTE GTS’ laboratory. For DICREST 15 the requested test solution is to be indicated on the order. The test is carried out per heat.
Test procedure in accordance with NACE TM 0284-03
The inspection test is performed in accordance with NACE TM 0284-03: Three specimens or more (depending on plate thickness) with defined dimensions are immersed for 96 h in a solution saturated with hydrogen sulfide. In dependance of the customers requirements the test can be performed with test solution A or B.
Test solution A: Test solution A contains 5% sodium chloride with 0,5% acetic acid and has a pH of approximately 3 after saturation with hydrogen sulfide.
Test solution B: Test solution B consists of artificial seawater and has a pH of approximately 5 after saturation with hydrogen sulfide.
Crack evaluation in accordance with NACE TM 0284-03
When the immersion is finished the specimens are cut to perform metallographic crack evaluation on 3 sections of each specimen. The crack dimensions are measured and expressed in relationship to the specimen dimensions by CLR (Crack Length Ratio), CTR (Crack Thickness Ratio) and CSR (Crack Sensitivity Ratio) values. The final test result and acceptance criteria are to the average CLR, CTR and CSR values of the sections of all specimens from one HIC test.
Download the PDF-file of this text here.
DICREST is DILLINGER HÜTTE GTS’ designation for a series of fine grained pressure vessel steels offering specific properties for sour gas service. DICREST steels have a defined resistance to hydrogen induced cracking (HIC). The special sour gas properties of DICREST steels are an addition to the properties guaranteed in the specified standard and do not influence these. This material specification describes the steel design for the DICREST series in accordance with ASTM/ASME A/SA 516 Grade 60, 65 and 70. DI-MC 355: CE = 0,33%, Pcm = 0,17%
DI-MC 420: CE = 0,38%, Pcm = 0,19%
DI-MC 460: CE = 0,39%, Pcm = 0,19%
DI-MC 550: CE <= 0,45%, Pcm <= 0,28%
C + Mn/6 + (Cr + Mo + V)/5 + (Cu + Ni)/15
C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B