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Qingdao O.B.T Manufacture Co., Ltd.
Qingdao O.B.T Manufacture Co., Ltd.

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CategoriesLost Wax Castings
BrandOBT casting part Manufacturer
MaterialCast Duplex Stainless Steel CD3MWCuN, 2205, 2507
Casting ProcessLost Wax Investment Casting + CNC Machining
OEM Custom ServiceAvailable
ApplicationValve Housing
Heat TreatmentAnnealing, Solution, Quenching, Normalizing, Carbu
Update TimeMarch 28,2023
Detail Information

Custom cast duplex stainless steel investment casting product from China casting foundry with machining, heat treatment, and surface treatment services.

OBT cast precision cast steel parts that consistently meet or exceed customer expectations. Lost wax investment casting allows us to produce metal parts as small as tens of grams and as large as tens of kilograms, in a wide range of ferrous and non-ferrous alloys and with exceptional dimensional accuracy.

The lost wax casting process produces near-net-shape precision metal parts that often require little or no additional machining. The resulting finish is also much better than what is achievable through other processes. The strength and durability of the casting parts make themselves ideal for high wear-resistance applications requiring millions of cycles.

precision Investment casting process

Duplex Stainless Steel (DSS) refers to stainless steel with ferrite and austenite each accounting for about 50%. Generally, the content of less phases needs to be at least 30%. In the case of low C content, the Cr content is 18% to 28%, and the Ni content is 3% to 10%. Some duplex stainless steels also contain alloying elements such as Mo, Cu, Nb, Ti, and N.

Available grade of duplex stainless steel at OBT Casting Foundry: 1.4460, 1.4462, 1.4468, 1.4469, 1.4517, 1.4770, A 890 1C, A 890 1A, A 890 3A, A 890 4A, A 890 5A, A 995 1B, A 995 4A, A 995 5A, 2205, 2507, 022Cr22Ni5Mo3N, 022Cr25Ni6Mo2N

The DSS has the characteristics of austenitic and ferritic stainless steel. Compared with ferrite, it has higher plasticity and ductility, no room temperature brittleness, and significantly improved intergranular corrosion resistance and welding performance, while still maintaining brittleness, high thermal conductivity, and superplasticity as ferrite stainless steel. Compared with austenitic stainless steel, DSS has high strength and significantly improved resistance to intergranular corrosion and chloride stress corrosion. Duplex stainless steel has excellent pitting corrosion resistance and is also a nickel-saving stainless steel.

Equivalent Grade of Stainless Steel
Martensitic and Ferritic Stainless Steel 420 C1,4034X43Cr16    
440 B/11,4112X90 Cr Mo V18    
-1.2083X42 Cr 13-2314F.5263-
4031.4000X6Cr13403 S 172301F.3110X6Cr13
(410S)1.4001X7 Cr 14(403 S17)2301F.3110X6Cr13
4051.4002X6 CrAl 13405 S 17-F.3111X6 CrAl 13
4161.4005X12 CrS 13416 S 212380F.3411X12CrS13
4101.4006X 10 Cr 13410 S212302F.3401X12Cr13
4301.4016X6 Cr 17430 S 172320F.3113X8Cr17
4201.4021X20 Cr 13420 S 372303F.3402X20Cr13
420F1.4028X30 Cr 13420 S 45(2304)F.3403X30Cr13
(420)1.4031X39Cr13420 S 45(2304)F.3404-
4311.4057X20 CrNi 17 2431 S 292321F.3427X16CrNi16
430F1.4104X12 CrMoS 17-2383F.3117X10CrS17
4341.4113X6 CrMo 17434 S 172325-X8CrMo17
430Ti1.4510X6 CrTi 17---X6CrTi17
4091.4512X5 CrTi 12409 S 17--X6CrTi12
Austenitic Stainless Steel3041.4301X5 CrNi 18 9304 S 152332F.3551X5CrNi18 10
3051.4303X5 CrNi 18 12305 S 19--X8CrNi19 10
3031.4305X12 CrNiS 18 8303 S 212346F.3508X10CrNiS 18 09
304L1.4306X2 CrNiS 18 9304 S 122352F.3503X2CrNi18 11
3011.4310X12 CrNi 17 7-2331F.3517X12CrNi17 07
3041.4350X5 CrNi 18 9304 S 312332F.3551X5CrNi18 10
3041.4350X5 CrNi 18 9304 S 312333F.3551X5CrNi18 10
304LN1.4311X2 CrNiN 18 10304 S 622371--
3161.4401X5 CrNiMo 18 10316 S 162347F.3543X5CrNiMo17 12
316L1.4404-316 S 12/13/14/22/242348 X2CrNiMo17 12
316LN1.4429X2 CrNiMoN 18 13-2375--
316L1.4435X2 CrNiMo 18 12316 S 12/13/14/22/242353-X2CrNiMo17 12
3161.4436-316 S 332343-X8CrNiMo 17 13
317L1.4438X2 CrNiMo 18 16317 S 122367-X2CrNiMo18 16
3291.4460X3 CrNiMoN 27 5 2-2324F.3309-
3211.4541X10 CrNiTi 18 9321 S 122337F.3553X6CrNiTi18 11
3471.4550X10 CrNiNb 18 9347 S 172338F.3552X6CrNiNb18 11
316Ti1.4571X10 CrNiMoTi 18 10320 S 172350F.3535X6CrNiMoTi 17 12
3091.4828X15 CrNiSi 20 12309 S 24--X16 CrNi 24 14
3301.4864X12 NiCrSi 36 16----
Duplex Stainless SteelS327501.4410X 2 CrNiMoN 25 7 4-2328--
S315001.4417X 2 CrNiMoSi 19 5-2376--
S318031.4462X 2 CrNiMoN 22 5 3-2377--
S327601.4501X 3 CrNiMoN 25 7----


investment casting foundry - RMC


▶ Ferrous Metals and Non-ferrous Metals for Investment Casting, Lost Wax Casting Process:
• Gray Iron: HT150, HT200, HT250, HT300, HT350; GJL-100, GJL-150, GJL-200, GJL-250, GJL-300, GJL-350; GG10~GG40.
• Ductile Iron or Nodular Iron: GGG40, GGG50, GGG60, GGG70, GGG80; GJS-400-18, GJS-40-15, GJS-450-10, GJS-500-7, GJS-600-3, GJS-700-2, GJS-800-2; QT400-18, QT450-10, QT500-7, QT600-3, QT700-2, QT800-2;
• Carbon Steel: AISI 1020 - AISI 1060, C30, C40, C45.
• Steel Alloys: ZG20SiMn, ZG30SiMn, ZG30CrMo, ZG35CrMo, ZG35SiMn, ZG35CrMnSi, ZG40Mn, ZG40Cr, ZG42Cr, ZG42CrMo...etc on request.
• Stainless Steel: AISI 304, AISI 304L, AISI 316, AISI 316L, 1.4401, 1.4301, 1.4305, 1.4307, 1.4404, 1.4571 and other stainless steel grade.
• Brass, Red Copper, Bronze or other Copper-based alloy metals: ZCuZn39Pb3, ZCuZn39Pb2, ZCuZn38Mn2Pb2, ZCuZn40Pb2, ZCuZn16Si4
• Other Materials as per your unique requirements or according to ASTM, SAE, AISI, ACI, DIN, EN, ISO, and GB standards

▶ Capabilities of Investment Casting Foundry
• Max Size: 1,000 mm × 800 mm × 500 mm
• Weight Range: 0.5 kg - 100 kg
• Annual Capacity: 2,000 tons
• Bond Materials for Shell Building: Silica Sol, Water Glass and their mixtures.

Services Description
Surface Treatment ServicesPowder Coating, Anodization, Electrophotesis, Chrome Plating, Painting, Sand blasting, Nickel Plating, Zinc Plating, Blacking, Polishing, Bluing, Geormet, Zintek, etc.
CNC Precision Machining ServicesLathing, Milling, Turning, Honing, Drilling, Boring, Tapping, Wire Electrode Cutting, Grinding...etc.
Inspection and Quality ControlSpectrum Analyzer, CMM, Hardness Tester, Tensile Strength Tester, Yild Strentgh Testor, Sealing Pressure Tester, Carbon Sulfur Analyzer, Metallurgical Microscopy, Press Force Tester...etc.
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