Machine Lever for Marine & Offshore
For shipyards, marine equipment builders and offshore operators. Specified to classification-society rules (DNV, ABS, LR) and NORSOK M-630 where offshore applies.
The Machine Lever is supplied to shipyards, marine equipment builders and offshore operators as an investment casting, in 7 catalogued sizes by overall length. In this sector the governing consideration is permanent seawater exposure, where a coating is a maintenance schedule rather than a strategy.
- Specified to
- classification-society rules (DNV, ABS, LR) and NORSOK M-630 where offshore applies
- Governing factor
- Permanent seawater exposure, where a coating is a maintenance schedule rather than a strategy
- Failure mode to design out
- Crevice corrosion under a gasket or inside a threaded joint, in the places nobody inspects
- Alloys
- CF8M, CF3M, CF8, CF3
Alloys Specified for This Part in Marine & Offshore
Which of these is right depends on the medium, the temperature and the pressure rather than on the sector alone — two plants in the same industry routinely specify different grades for the same part.
| Grade | Specification | Corrosion | Temperature |
|---|---|---|---|
| CF8M | ASTM A351 CF8M / UNS J92900 (cast 316) | Good pitting and crevice resistance in chlorides; standard choice for seawater-adjacent and chemical process duty. | approx. -196 C to +550 C, derated for pressure-retaining service above 425 C |
| CF3M | ASTM A351 CF3M / UNS J92800 (cast 316L) | As CF8M, with the low carbon that prevents sensitization at welds. | approx. -196 C to +425 C |
| CF8 | ASTM A351 CF8 / UNS J92600 (cast 304) | Good general corrosion resistance in fresh water, steam and mild chemicals; not for chlorides. | approx. -196 C to +550 C |
| CF3 | ASTM A351 CF3 / UNS J92500 (cast 304L) | As CF8 with low carbon for welded assemblies. | approx. -196 C to +425 C |
| CB7Cu-1 (17-4 PH) | ASTM A747 CB7Cu-1 / UNS J92180 (17-4 PH) | Between CF8 and CF8M, depending on ageing condition; H1150 is more corrosion resistant than H900. | approx. -73 C to +316 C |
| WCB | ASTM A216 WCB / UNS J03002 | None inherent — carbon steel castings are painted, plated or galvanized for corrosion protection. | approx. -29 C to +425 C |
| AISI 4140 Cast | ASTM A732 Gr 4140 / UNS G41400 (42CrMo4) | None inherent; specify plating or a coating. | approx. -40 C to +425 C |
| A356 / A356-T6 | ASTM B26 A356-T6 / AlSi7Mg0.3 | Good atmospheric resistance; anodize or coat for marine exposure. | approx. -50 C to +150 C |
Alloys & Grades
The Machine Lever is cast in 8 of the 63 grades we work in. Those are listed first; the full reference tree is underneath, with each designation shown alongside its ASTM/UNS, EN and GB equivalents.
- CF8M ASTM A351 CF8M / UNS J92900 (cast 316)
- CF3M ASTM A351 CF3M / UNS J92800 (cast 316L)
- CF8 ASTM A351 CF8 / UNS J92600 (cast 304)
- CF3 ASTM A351 CF3 / UNS J92500 (cast 304L)
- CB7Cu-1 (17-4 PH) ASTM A747 CB7Cu-1 / UNS J92180 (17-4 PH)
- WCB ASTM A216 WCB / UNS J03002
- AISI 4140 Cast ASTM A732 Gr 4140 / UNS G41400 (42CrMo4)
- A356 / A356-T6 ASTM B26 A356-T6 / AlSi7Mg0.3
Browse all 63 cast grades we work instainless · carbon & low-alloy · nickel & cobalt · copper · aluminium · titanium
Austenitic Cast Stainless Steel
- CF8 ASTM A351 CF8 · UNS J92600 · AISI 304 cast · EN 1.4308
- CF3 ASTM A351 CF3 · UNS J92500 · AISI 304L cast · EN 1.4309
- CF8M ASTM A351 CF8M · UNS J92900 · AISI 316 cast · EN 1.4408
- CF3M ASTM A351 CF3M · UNS J92800 · AISI 316L cast · EN 1.4409
- CF8C ASTM A351 CF8C · UNS J92710 · AISI 347 cast · EN 1.4552
- CG8M ASTM A351 CG8M · UNS J93000 · AISI 317 cast
- CN7M ASTM A351 CN7M · UNS N08007 · Alloy 20 cast · Carpenter 20
- CK3MCuN ASTM A351 CK3MCuN · UNS J93254 · 254 SMO cast · EN 1.4547
- CN3MN ASTM A351 CN3MN · UNS J94651 · AL-6XN cast
Martensitic Cast Stainless Steel
- CA15 ASTM A743 CA15 · UNS J91150 · AISI 410 cast · EN 1.4008
- CA40 ASTM A743 CA40 · UNS J91153 · AISI 420 cast · EN 1.4034
- CA6NM ASTM A743 CA6NM · UNS J91540 · EN 1.4313 · GX4CrNi13-4
- CA15M ASTM A743 CA15M · UNS J91151
- CA6N ASTM A743 CA6N · UNS J91650
Precipitation-Hardening Cast Stainless Steel
- CB7Cu-1 (17-4 PH) ASTM A747 CB7Cu-1 · UNS J92180 · 17-4 PH cast · AISI 630
- CB7Cu-2 (15-5 PH) ASTM A747 CB7Cu-2 · UNS J92110 · 15-5 PH cast
Duplex & Super Duplex Cast Stainless Steel
- CD3MN (2205) ASTM A890 Gr 4A · UNS J92205 · Duplex 2205 cast · EN 1.4470
- CE3MN (2507) ASTM A890 Gr 5A · UNS J93404 · Super Duplex 2507 cast · EN 1.4469
- CD4MCu ASTM A890 Gr 1A · UNS J93370
- CD3MWCuN (Zeron 100) ASTM A890 Gr 6A · UNS J93380 · Zeron 100 cast
Heat-Resistant Cast Stainless Steel
- HK30 ASTM A297 HK30 · UNS J94203 · GX40CrNiSi25-12
- HK40 ASTM A297 HK40 · UNS J94204 · EN 1.4848
- HH ASTM A297 HH · UNS J93503 · EN 1.4837 cast
- HT ASTM A297 HT · UNS J94605
- HP ASTM A297 HP · UNS J95705 · GX40NiCrSi35-25
Carbon Steel Castings
- WCB ASTM A216 WCB · UNS J03002 · GP240GH · EN 1.0619
- WCC ASTM A216 WCC · UNS J02503
- WCA ASTM A216 WCA · UNS J02502
- LCB ASTM A352 LCB · UNS J03003
- LCC ASTM A352 LCC · UNS J02505
- AISI 1045 Cast ASTM A732 Gr 1045 · UNS G10450 · C45 · 45#
Low-Alloy Steel Castings
- AISI 4140 Cast ASTM A732 Gr 4140 · UNS G41400 · 42CrMo4 · EN 1.7225
- AISI 8620 Cast ASTM A732 Gr 8620 · UNS G86200 · 20CrNiMo
- WC6 ASTM A217 WC6 · UNS J12072 · 1.25Cr-0.5Mo · G17CrMo5-5
- WC9 ASTM A217 WC9 · UNS J21890 · 2.25Cr-1Mo · G17CrMo9-10
- C5 ASTM A217 C5 · UNS J42045 · 5Cr-0.5Mo
- C12A ASTM A217 C12A · UNS J84090 · Grade 91 · 9Cr-1Mo-V
- AISI 4340 Cast ASTM A732 Gr 4340 · UNS G43400 · 40CrNiMoA
Nickel-Base Alloy Castings
- Inconel 625 (CW6MC) ASTM A494 CW6MC · UNS N26625 · Inconel 625 · Alloy 625
- Inconel 718 AMS 5383 · UNS N07718 · Alloy 718 · GH4169
- Inconel 713C AMS 5391 · UNS N07713 · Alloy 713C
- Hastelloy C (CW6M) ASTM A494 CW6M · UNS N30107 · Hastelloy C cast
- Hastelloy C-276 (CW12MW) ASTM A494 CW12MW · UNS N30002 · Alloy C-276 cast
- Monel M-35-1 ASTM A494 M35-1 · UNS N24135 · Monel 400 cast
Cobalt-Base Alloy Castings
- CoCrMo (ASTM F75) ASTM F75 · UNS R30075 · CoCr28Mo6
- Stellite 6 UNS R30006 · CoCr-A · Alloy 6
- Stellite 12 UNS R30012 · Alloy 12
- X-40 (Co-Cr-W) AMS 5382 · UNS R30031 · Haynes 31
Bronze Castings
- C95800 Nickel Aluminum Bronze ASTM B148 C95800 · UNS C95800 · NAB · CuAl10Fe5Ni5
- C95500 Nickel Aluminum Bronze ASTM B148 C95500 · UNS C95500
- C90300 Tin Bronze ASTM B584 C90300 · UNS C90300 · 88-8-0-4
- C93200 Bearing Bronze ASTM B584 C93200 · UNS C93200 · SAE 660
Brass Castings
- C83600 Red Brass ASTM B584 C83600 · UNS C83600 · 85-5-5-5
- C87600 Silicon Brass ASTM B584 C87600 · UNS C87600
- C86300 Manganese Bronze ASTM B584 C86300 · UNS C86300
Aluminum Alloy Castings
- A356 / A356-T6 ASTM B26 A356 · UNS A13560 · AlSi7Mg0.3 · EN AC-42000
- A357 ASTM B26 A357 · UNS A13570 · AlSi7Mg0.6
- 355 / C355 ASTM B26 355 · UNS A03550 · AlSi5Cu1Mg
- A201-T7 ASTM B26 A201 · UNS A02010 · AlCu4MgTi
Titanium Castings
- Ti-6Al-4V (Grade 5) ASTM B367 Gr C-5 · UNS R56400 · TC4 · Ti-6-4
- CP Titanium Grade 2 ASTM B367 Gr C-2 · UNS R50400
Special & Wear Alloys
- Ni-Resist D-2 ASTM A439 D-2 · UNS F43000
- High-Chrome White Iron ASTM A532 Class III · 25Cr white iron
Technical Drawing
Every parameter below is editable, and the drawing redraws to match the values you choose. Picking a size snaps the other fields to that size's values; you can then override any one of them.
Request a Quotation
The form follows the drawing configuration above. Attaching a drawing or a STEP file is the fastest route to a firm price.
Dimensions & Parameters
Nominal casting dimensions before machining allowance. Every row is a starting point for the customizer above.
| Size | Overall Length L (mm) | Overall Width W (mm) | Thickness T (mm) | Hole Diameter ØD (mm) | Hole Spacing C (mm) | Boss Diameter (mm) | Fillet Radius R (mm) | Casting Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 80 mm | 80 | 27.2 | 7.6 | 6 | 59.2 | 12.6 | 6 | 0.07 |
| 100 mm | 100 | 34 | 9.5 | 8 | 74 | 16.8 | 7.5 | 0.14 |
| 125 mm | 125 | 42.5 | 11.9 | 9 | 92.5 | 18.9 | 9.5 | 0.27 |
| 160 mm | 160 | 54.4 | 15.2 | 12 | 118.4 | 25.2 | 10 | 0.57 |
| 200 mm | 200 | 68 | 19 | 15 | 148 | 31.5 | 10 | 1.11 |
| 250 mm | 250 | 85 | 23.8 | 19 | 185 | 39.9 | 10 | 2.17 |
| 320 mm | 320 | 108.8 | 25 | 24 | 236.8 | 50.4 | 10 | 3.73 |
Frequently Asked Questions
What matters most for a machine lever in Marine & Offshore?
Permanent seawater exposure, where a coating is a maintenance schedule rather than a strategy. The failure this sector designs out is crevice corrosion under a gasket or inside a threaded joint, in the places nobody inspects.
Which specifications apply in Marine & Offshore?
Commonly classification-society rules (DNV, ABS, LR) and NORSOK M-630 where offshore applies. Name the one your drawing works to on the RFQ — it changes the testing, the documentation and the price, and it is cheaper to agree before tooling than after.
Which alloys are used for a machine lever in Marine & Offshore?
Commonly CF8M, CF3M, CF8, CF3 and CB7Cu-1 (17-4 PH). The right one depends on the medium, the temperature and the pressure rather than on the sector alone — two plants in the same industry routinely specify different grades for the same part.
How do I request a quotation?
Configure the drawing on this page — size, alloy, finish — and submit the form. Attaching a drawing or a STEP file is the fastest route to a firm price, and it lets us flag a castability issue before you commit to tooling.
More on the Machine Lever
The full record for the machine lever — every catalogued size, the parametric drawing and the quote form — is on the Machine Lever product page.
Each grade changes the price, the weight and what the part survives, so there is a page per grade for this part: CF8M (the chloride-resistant default), CF3M (low carbon, for welded assemblies), CF8 (cheaper, where chlorides are absent), WCB (the carbon-steel cost baseline), CF3 (low carbon, no chlorides) and CB7Cu-1 (17-4 PH) (age-hardened, high strength).
How it is shelled decides the tolerance and the surface you get, and the tolerance band is worked out against this part's own dimensions on each: Silica Sol Casting (DCTG 5 – 7, Ra 3.2 – 6.3 µm), Water Glass Casting (DCTG 7 – 9, Ra 6.3 – 12.5 µm) and Composite Shell Casting (DCTG 6 – 8, Ra 6.3 – 12.5 µm).
The specification and the testing change by sector more than the geometry does, so the machine lever is written up separately for General Machinery and Automotive & Transport.
If the question is still whether a casting is the right way to make this part at all, the Machine Lever application guide covers where it is used, what has to be decided before a price exists, and where investment casting is the wrong answer.