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Grades and conditions
Materials we machine
MSE machines pump parts in more than 20 grades at its works in Germiston, east of Johannesburg: austenitic and martensitic stainless, duplex and super duplex, cast stainless CA6NM, alloy and carbon steels, grey, ductile and nickel cast irons, tin and phosphor bronzes, and engineering plastics. Every grade below appears in our own orders from 2024 to 2026. We buy the material to the grade and condition on your drawing, or machine material you supply.
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Grades and conditions
| Group | Grades we machine | Conditions we have supplied |
|---|---|---|
| Austenitic stainless | 304 (1.4301); 316 (1.4401); 316L (1.4404); 316Ti (1.4571); A276 316 | As supplied |
| Martensitic stainless | 431 (1.4057, EN57); 410; 420 and 13% Cr (1.4021, 1.4034) | 431 hardened and tempered to QT800 or to HB300; 1.4034 QT800; A276 410 condition H |
| Duplex | 1.4462 (2205 family) | As supplied; mill certificate when the order requires it and the mill provides it |
| Super duplex | 1.4501 (S32760 family) | Machined from bar supplied with an EN 10204 3.2 mill certificate |
| Cast stainless | CA6NM (13/4) | From castings poured by our foundry partners |
| Alloy steels | 42CrMo4 / EN19T (1.7225); F91 | 42CrMo4 hardened and tempered |
| Carbon and free-machining steels | C45 / EN8; free-machining steel (11SMn30); spring steel | C45 normalised or hardened and tempered |
| Cast irons | Grey cast iron EN-GJL-250; ductile iron; nickel cast iron | From castings poured by our foundry partners, or yours |
| Bronzes | Tin bronzes CC480K and CC495K; leaded tin bronze CuSn7ZnPb (LG2 family); phosphor bronze PB1 | Cast bronze |
| Engineering plastics | PTFE; glass-filled PTFE; nylon (PA); polymer bearing materials | Machined from blanks |
| Hard overlays and coatings, through partners | Stellite 6 hardfacing; hard chrome; thermal spray | Applied by specialist partners, finished by us |
| Your material | Free-issue bar, castings and parts | As you supply it |
Which grades go into which parts
| Part family | Grades typical in our records |
|---|---|
| Pump shafts | EN8 (C45), EN19T (42CrMo4), 1.4021, 431, duplex |
| Wear rings | Cast iron, bronze CC480K, 316, duplex castings |
| Shaft and protection sleeves | 304, 316, 431, duplex tube or bar |
| Bushes | Cast iron, bronze, PTFE, steel |
| Balance discs, throwers, nuts, lantern rings | Stainless, bronze, steel |
Not sure of the grade?
Write "match the original" or "please advise" on your enquiry, and send the old part or the pump make, model and size. If you need a mill certificate, say so at quote stage: it changes the material we buy.
Questions buyers ask
Who machines duplex and super duplex pump parts in South Africa?
MSE (Mechanical Spares & Engineering) in Germiston, Gauteng, machines pump parts in duplex 1.4462 (2205 family) and super duplex 1.4501 (S32760 family) to drawing, and passes on the mill certificate when the order requires one and the mill provides it.
Do you machine 431 stainless hardened and tempered?
Yes. MSE machines 431 (1.4057) hardened and tempered, for example to QT800 or HB300, including for pump shafts.
Do you make parts in bronze?
Yes. MSE machines tin bronzes CC480K and CC495K, leaded tin bronze of the LG2 family and phosphor bronze PB1, including for wear rings and bushes.
Can you supply a material certificate?
Ask at quote stage. Mill certificates to EN 10204 3.1, or 3.2 where the mill issues one, are passed on when the order requires them and the mill provides them.
Need a part made?
Send your drawing or sample to orders@mse.engineer or call (011) 828 9825.