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50Mn / DG20Mn / 25Cr2Ni4MoV Heavy Steel Forgings ASME Marine Shaft Forging

Marine Shaft

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Description

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50Mn / DG20Mn / 25Cr2Ni4MoV Heavy Steel Forgings ASME Marine Shaft Forging

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Products:

Marine forging, ship shaft, screw shaft, rudder stock, bearing pintle, cardan shaft, intermediate shaft

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Products reference:

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? Material | ? 50Mn,DG20Mn,25Cr2Ni4MoV,34CrNiMo6 |
? Max. weight | ? 40T |
? Apply for | ? Ship, cargo, steamer engine fittings, dock port machinery parts. |
? Melting process | ? ? EF+LF+VD |
? Process technology | ? ? Forging+heat treatment+rough machining+finish machining |
? Forging ratio | ? ≥3.5 |
? Applicable standard | ? ? ASTM,ASME,DIN,JIS,ISO,BS,API,EN |
? Executive standard | ? ? JB/GB/EN/DIN/JIS/ASME/ASTM/ISO |
? Certification authority | ? ? ABS/ DNV/ BV/ GL/KR/ CCS/ LR/ NK/ RINA/ RS. |
? Delivery terms | ? Rough machining(N+T); finish machining(Q+T) |
? Test equipment | ? Spectrograph, UT device, tensile and impact test machine, metalloscope,external micrometer, bore dial indicator, hardness testing device and so on. |
? Service | ? Our service included the forging, process, heat treatment, finish machining, package, local logistics, customers clearance and maritime transport. We took the customer’s requirements as the principal thing, and pay attention on the products quality. |
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Custom properties

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? Material elements | C | Si | Mn | P | S | Cr | Ni | Mo | V |
50Mn | 0.48-0.56 | 0.17-0.37 | 0.70-1.00 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | -- | - |
DG20Mn | 0.17-0.24 | 0.17-0.34 | 0.70-1.00 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | -- | ? |
25Cr2Ni4MoV | ≤0.25 | ≤0.23 | ≤0.53 | ≤0.006 | ≤0.004 | ≥1.62 | ≥3.75 | ≥0.33 | ≥0.09 |
34CrNiMo6 | 0.30-0.38 | ≤0.040 | 0.50-0.80 | ≤0.035 | ≤0.035 | 1.30-1.70 | 1.30-1.70 | 0.15-0.30 | ? |
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? Mechainal properties | ? Dia.(mm) | ? TS/Rm(Mpa) | ? YS/Rp0.2(Mpa) | ? EL/A5(%) | ? RA/Z(%) | ? Type Of notch | ? Impact energy | ? HBW |
50Mn | ?25 | ≥645 | ≥390 | ≥13 | ≥40 | V | ≥31 | ≤255HBS |
DG20Mn | ?25 | ≥450 | ≥275 | ≥24 | ≥50 | ? | ? | ? |
34CrNiMo6 | ?15 | 750-900 | 450-600 | ≥13 | ≥55 | V | -40℃≥20 | ≤269HBS |
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Process procedure:

Forging process flow quality control: Raw material steel ingot into warehouse(test the chemical content) → Cutting→ Heating(Furnace temperture test) → Heat treatment after forging(Furnace temperture test) Discharge the furnace(blank inspection)→ Machining→ Inspection(UT,MT,Visal diamention, hardness)→ QT→ Inspection(UT, mechanical properties, hardness, grain size)→ Finish machining→ Inspection (dimension)→ Packing and Marking(steel stamp, mark)→ Storage Shipment

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Commerce clause

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? MOQ | ? 1PC |
? Delivery time | ? 30-60 days |
? Package | ? Wood pallet, steel frame support |
? Delivery terms | ? FOB;CIF;CFR；DDU； |
? Payment terms | ? T/T,LC |
? Type of shipping | ? By ocean, air |
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Keywords

Various of forging used for marine products, dock port machinery, marine engine crank shaft with the ten classification certificates.

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Note:
# Excellent mechanical properties;
# Produce different dimension based on customer’s requirements;
# Advanced manufacture equipments and inspection devices;
# Excellent technical personality;

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