Mir 50® High Strength Corrosion
Resistant - Stainless Pump Shaft |
304 and 316 Commercial
Grade Stainless Steel |
Ease of machining. Engineered for ease
of machining. Less induced stress. Less
movement. Not gummy. Will hold a close
tolerance bright surface finish. |
Hard to Machine. Gummy. Won't hold a bright finish. Machining difficulty results in bow and twist. Subject to bow later in service. (memory). |
Corrosion Resistant. Superior service
life in corrosive applications. Corrosion
resistance like 316. |
Corrosion Resistant. Most frequently used
stainless in maintenance applications because of high degree of corrosion resistance. |
High strength. At approx. 30RC Mir 50
has Typical Tensile Properties of 140KSI -
consistent from the smallest diameter
through large size rounds. |
Low strength. Not harden-able by heat
treatment. Can be supplied with some hardness developed by "Strain Hardening", but limited to sizes smaller than 1-3/4" Diameter. Strain hardening results in higher retained stress. |
Anti-galling. Excellent for use with OEM
threaded parts of 300 series stainless. Use
in conjunction with; 300 series stainless,
400 series stainless, PH series, carbon and
alloy steel grades. Parts come apart easily
during changeovers. |
Highly susceptible to "galling". Most OEM parts are supplied with both male and female parts made from a 300 series grade. Parts seize and gall. Threads are easily damaged due to galling and low strength. |
Low-Retained-Stress. Special "Double-
Stress-Relief" at mill. Second tempering
cycle added at end of mill production. Ease
of machining means less stress is released
during processing operations.
Less stress=less memory=no movement. |
High degree of retained stress. i.e. high
degree of "Memory". Gummy during machining operations. Even moderate machining results in bow, twist, and movement. |
Pump Shaft Straightness. Delivered to
special straightness. (.005"in first 5 ft, plus
.0015" for each additional foot of shaft.)
Less wear on bearings, seals and sleeves.
Shipped "Boxed-and-Cradled". |
Commercial straightness. Subject to
movement in machining. Subject to movement in service. Chatter, vibration, wear on bearings, seals and sleeves. |
More Options From Stock. Available in
two surface finishes; TG&P and Fine
Turned Oversize (The size will make the
size), and rough machined heavy wall
bushing stock. Tight tolerance TG&P will
often accept bearings with no further
machining. |
Limited options. Commercially available as
Cold Drawn. Centerless Ground, or peeled.
Tolerances are plus and minus. Most often
requires machining the next largest size for
bearings fit. Difficult machining causes bow and twist, etc. |
Long Lengths. On the shelf in lengths to
30ft. Sold also as cut lengths, even to 17
and 18ft dead lengths. No splicing or
welding is required. Offered as random
lengths covering a broad length range. Also
supplied cut to your exact lengths. Short
pcs, or long cut bars are no problem. |
Standard commercial lengths are 10 to 13ft
random. Difficult to purchase as small cut
lengths. Difficult to purchase as long cut
lengths. |
