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Cost Estimation

The document provides information to calculate the cost of welding different thickness plates. It gives the weight of welding rod required per meter based on the plate thickness. It also lists the costs of labor, welding machine usage, electricity and total cost per meter of welding 10mm thick plates. Further down it provides an example cost calculation for manufacturing a heavy component, including costs of raw materials, fabrication, heat treatment, fixtures, inspection and indirect expenses to arrive at a total manufacturing cost.

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nath81
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519 views6 pages

Cost Estimation

The document provides information to calculate the cost of welding different thickness plates. It gives the weight of welding rod required per meter based on the plate thickness. It also lists the costs of labor, welding machine usage, electricity and total cost per meter of welding 10mm thick plates. Further down it provides an example cost calculation for manufacturing a heavy component, including costs of raw materials, fabrication, heat treatment, fixtures, inspection and indirect expenses to arrive at a total manufacturing cost.

Uploaded by

nath81
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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M.S. welding rod cost from internet 100 Rs.

/kg
approx. cost indiamart
S.S. welding rod cost from internet 300 Rs./kg

Calculate volume of weld then wt of welding and then multiply wt of weld by welding rod wt.

Length of welding in m

Wt. of welding rod for 10 mm plate thk. = 1 kg/m x from internet

thk of plate y

for other thk. Of plates SQR(y/x) kg/m k

Multiply above value by length of welding in meter, k.m kg of welding rod required

Example

Welding Deposit rate 5 kg/Hr from internet

Time reqd. for welding 1 m 0.2 Hr

Labour cost per hour 125 Rs/Hr assumed Rs. 20000 / month 160 hrs/m

Labour cost for 1 m L welding 25 Rs. 1)

Welding Rod cost per meter 100 Rs. 2)

Cost of machine 25000 Rs.

Provision reqd after 15 yrs 50000 Rs.

Cost of machine to recover per year 3333

cost of machine recover per hour 1.39 3) assuming 300 d x 8 hr use of machine

Cost of electricity 10 Rs/unit x 10 kWh 100 Rs/hr

Cost of elec. Per meter 20 Rs. 4)

Total cost per meter for 10 mm thk. 146 Rs. Say 150 Rs./m
ing rod required

Rs. 20000 / month 160 hrs/mnth

300 d x 8 hr use of machine


Weight of Finished Component 6000 kg
Weight of Raw Material 6500 kg 500 Kg extra raw material

Material SA 516/IS 2062 Rate 75 per kg


Jig & Fixtures ms Rate 50 per kg
Heat Treatment Rate 500 per kg

Direct cost

Raw Material Cost (MOQ 3 times reqd matl) 975000


Fabrication
Cost/Hr No. of Total cost
Hours
Cutting of Plates 300 120 36000
Shell Rolling 500 120 60000 5 days
Welding of Shell, Top Bottom Flange,Ribs 300 240 72000 10 days
DP Test, Welding Inspection etc. 100000
Machinning of Top Flange (Lathe) 1300 240 312000
Machinning of Bottom Flange (Lathe) 1300 120 156000
Drilling 1300 240 312000 10 days
Total 1048000

Cost of Heat Treatment 600000 R x 0.2 x wt (heat treatment part are less)
Jigs & Fixtures Mat. Cost 90000 2 times wt of comp. assumed
Jigs & Fixtures Fab. Cost 500 120 60000
Inspection 104800 10 % fab. + machinning
Sub-Total 2877800
Prime Cost 2877800

Indirect Expenses
Administrative cost 28778 1 % of Prime cost
Site Support 0 1 % of Prime cost
Warrenty 287780 10% of prime cost per year
Insurance 86334 3 % of Prime Cost
402892
Indirect Expenses 402892

Manufacturing Cost (direct + Indirect Exp.) 3280692


Profit (10 %) 328069.2

Total Cost 3608761.2


36 Lakhs
nt part are less)

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