Providing an essential role in hydrocarbon processing applications from fired heaters to steam reformers, used in syngas production, to subsequent refining processes for the production of fertilisers for essential nutrients that feed our plants and crops to pharmaceutical equipment operating under cryogenic conditions. 

From providing the essential nutrients for the growth of our plants and crops to dermataological skin products to the whitening of our smile the fertilizer industry and associated key processes of UREA and ammonia production are an essential ingredient in today’s lives.  

Fertilizer production processes present environments with aggressive corrosion conditions, such as with Ammonium carbamate production at 180 ºC (356 ºF) to 250 ºC (482 ºF) and 150 bar (15 MPa). 

With associated processes such as nitric acid, sulphuric acid, phosphoric acid and melamine production more sophisticated solutions to the use of conventional stainless grades such as 304L/316L are required.  

From condensers to cooling towers consideration must be given to the differing types of corrosion presented by the potentially aggressive chemical plant corrosive environments.

Austenitic

DMV designationAttributeNearest equivalent standardTypical chemical composition 2)DensityMin. mechanical prop. at RT
  UNSENJISCmaxCrNiMoCuothers Rp0.2 Yield StrengthRm Tensile Strength
           g/cm3lb/in3MPaksiMPaksi
DMV 304Corrosion Resistant S304001.4301SUS 3040.0618.59.5   7.90.292053051575
DMV 304LCorrosion Resistant S304031.4306SUS 304L0.0319.011.07.90.291702548570
DMV 304LNCorrosion Resistant S304531.4311 0.0318.010.0   7.90.292053051575
DMV 321Corrosion Resistant S321001.4541SUS 3210.0818.510.5 5 x C < Ti < 0.67.90.291702548570
DMV 347Corrosion Resistant S347001.4550SUS 3470.0818.511.0  10 x C < Nb < 1.07.90.292053051575
DMV 316Corrosion Resistant S316001.4401SUS 3160.0617.011.52.258.00.292053051575
DMV 316LCorrosion Resistant S316031.4404 0.0317.012.02.25  8.00.291702548570
DMV 316LMoSCorrosion Resistant S316031.4435SUS 316L0.0317.012.52.758.00.291702548570
DMV 316LNCorrosion Resistant S316531.4429 0.0317.012.52.75 0.12 < N < 0.228.00.292053051575
DMV 316TiCorrosion Resistant S316351.45710.0817.011.52.258.00.292053051575
DMV 316LVMCorrosion Resistant S316731.4441 0.02517.514.02.8<0.10N<0.108.00.291902849071
DMV 317LCorrosion Resistant S317031.4438SUS 317L0.0318.014.53.58.00.292053051575
DMV 316LUGCorrosion Resistant S316031.4435 0.0217.013.54.5  8.00.291702548570
DMV 309Corrosion Resistant S309001.4828SUS 309 TB0.0725.014.07.90.292053051575
DMV 306SiCorrosion Resistant S306001.4361 0.01518.015.0  Si 47.90.292403554078
DMV 4439Corrosion Resistant (S31726)1.44390.0317.513.54.5N 0.168.00.292403555080
DMV 4335Corrosion Resistant S310021.4335 0.01525.020.5  N<0.107.90.292553754078
DMV 25.22.2Corrosion Resistant S310501.44660.0225.022.02.0N 0.127.90.292553754078
DMV 310SCorrosion Resistant S310081.4845 0.01525.021.0   7.90.292053051575
DMV 904Corrosion Resistant N089041.45390.0220.525.54.51.58.00.292153149071
DMV 926Corrosion Resistant N089261.4529 0.0220.025.06.50.8N 0.208.00.292954365094
DMV 954Corrosion Resistant S312541.45470.0220.018.06.2N 0.208.00.293104565595
DMV 304HHeat ResistantS304091.4948 0.08 2)18.59.5   7.90.292053051575
DMV 304HCuHeat Resistant1.49070.13 2)18.59.53.0N 0.10; Nb 0.57.90.292353459085
DMV 321HHeat ResistantS321091.4940 0.08 2)18.511.0  Ti > 4 x C < 0.67.90.291702548070
DMV 347HHeat ResistantS347091.49120.08 2)18.511.0Nb > 8 x C < 1.07.90.292053051575
DMV 347HFGHeat Resistant 1.4908 0.10 2)18.511.0  Ti+Nb > 8xC < 1.07.90.292053055080
DMV 310HHeat ResistantS310091.4845SUS 310 TB0.10 2)25.020.08.00.292053051575
DMV 310NHeat ResistantS310421.4952 0.10 2)25.020.0  N 0.20; Nb 0.408.00.292954365595
DMV 4841Heat Resistant1.48410.1025.020.5Si 2.08.00.292053051575

 

1) All figures in weight percentage. In case of order, the limits of the order specification will apply.
2) Minimum level of carbon content is mandatory.

Austenitic Ferritic

DMV designationNearest equivalent standardTypical chemical composition 1)DensityMin. mechanical prop. at RT
 UNSENCmaxCrNiMoCuothers Rp0.2 Yield StrengthRm Tensile Strength
         g/cm3lb/in3MPaksiMPaksi
DMV 22.5S318031.44620.0322.05.53.0N 0.17 2)7.80.284506562090
DMV 25.7NS327601.45010.0325.07.04.00.5N 0.25; W 0.5 2)7.80.2855080750109
DMV 29.7S329061.44770.0329.07.02.3< 0.80 N 0.35 2)7.80.2865094800116

 

1) All figures in weight percentage. In case of order, the limits of the order specification will apply.
2) Min PRE value controlled.

Nickel and Nickel Based Alloys

DMV designationAttributeNearest equivalent standardTypical chemical composition 1)DensityMin. mechanical prop. at RT
  UNSENCmaxCrNiMoCuothers Rp0.2 Yield StrengthRm Tensile Strength
          g/cm3lb/in3MPaksiMPaksi
DMV 200Pure NickelN022002.40660.0599.48.90.321031537955
DMV 201Pure NickelN022012.40680.02 99.4   8.90.32831234550
DMV 400Nickel-CopperN044002.43600.15 65.0 30.0Fe 2; Mn 1.58.80.321802645065
DMV 8020Corrosion ResistantN080202.46600.0220.034.02.53.5Nb + Ta8.10.292403555080
DMV 928Corrosion ResistantN080281.45630.0227.031.03.51.2N 0.108.00.292103150073
DMV 931Corrosion ResistantN080311.45620.01527.031.06.51.2N 0.208.10.292804165094
DMV 4692Corrosion ResistantN080342.46920.0127.035.06.51.5N 0.208.10.2931045750108
DMV 800LCorrosion Resistant(N08800)1.45580.02521.032.0Ti 0.30; Al 0.308.00.291802645065
DMV 800Corrosion ResistantN088001.48760.0821.032.0  Ti < 0.408.00.292103150073
DMV 825Corrosion ResistantN088252.48580.0322.042.03.02.0Ti 0.80; Al 0.108.10.291802653075
DMV 600LCorrosion ResistantN066002.48170.02516.076.0  Fe 88.40.301802655080
DMV 690Corrosion ResistantN066902.46420.0229.060.0Fe 98.20.292053058585
DMV 625Corrosion ResistantN06625 Gr.12.48560.02522.063.09.0 Nb 3.58.50.3141460827120
DMV G3Corrosion ResistantN069852.46190.01522.048.07.02.0Co;W8.30.302053058585
DMV C22Corrosion ResistantN060222.46020.0122.057.013.0 W8.70.3131045690100
DMV 59Corrosion ResistantN060592.46050.0123.059.016.0Al8.60.3134050690100
DMV C4Corrosion ResistantN064552.46100.0116.066.016.0 Ti8.60.3128041700102
DMV C276Corrosion ResistantN102762.48190.0116.057.016.0W8.40.3035051750109
DMV 800HHeat ResistantN088101.49580.10 2)21.032.0  (Al.Ti) 0.15 - 0.608.00.291702550073
DMV 811Heat ResistantN088111.49590.10 2)21.032.00.85 < Ti + Al < 1.208.00.291702550073
DMV AC66Heat ResistantS332241.48770.0627.032.0  Ce 0.07; Nb 0.88.00.291852750073
DMV 600HHeat ResistantN066002.48160.0716.076.0Fe 88.40.302403555080
DMV 625Heat ResistantN06625 Gr.22.48560.02522.063.09.0 Nb 3.58.40.3027640690100
DMV 601Heat ResistantN066012.48510.0823.062.0Al 1.2; Ti 0.38.10.292403560087
DMV 617Heat ResistantN066172.46630.0822.055.09.0 Co 12; Al; Ti8.40.3030044700102
DMV C263Heat ResistantN072632.46500.0820.052.05.8Co 20;Ti 2.1,Al 0.5;Mn <0.68.40.35851181004145
DMV 718Corrosion ResistantN077182.46680.0819.052.53.0Nb 5.1;Mn 0.35;Ti 0.8;Al 0.58.20.2910351501276185

 

1) All figures in weight percentage. In case of order, the limits of the order specification will apply.
2) Minimum level of carbon content is mandatory.

Serving Applications Such As:

Urea strippers

Carbamate condensers

Tubes: U bent or straight tubes up to 43 m (110 ft) long.

Bimetallic Tubes

Bimetallic tubes were developed as a solution to service some of the most aggressive environments associated with Urea strippers. 

Consisting of an external tube of DMV 25.22.2 and internal tube lining of Zirconium grade 702 we innovated our process technology to ensure the integral bonding during the cold working process.

Bimetallic pipes and process pipework in typical dimensions up to 31 mm (1.22”) OD.