Mir 50® High Strength
Corrosion Resistant - High Strength |
410 and 416 Commercial Grade
Stainless Steel |
High degree of corrosion resistance like
type 316 Hardened "PH" Custom Stainless
Alloy |
Relatively low degree of corrosion
resistance compared to 316. General tool
room grades of hardenable stainless. Worst
of both worlds - not a great stainless. Not a
great alloy. |
Elevated strength levels. Hardness as
delivered - 26 to 33RC. Typical Tensile
approx. 140K @ 28RC. Can be hardened to
36 to 44RC with very little loss in corrosion
resistance. |
Most often delivered at 22 to 28 RC. Typical
Tensile @ 26RC, 120KSI. Additional
hardening diminishes corrosion resistance
and lowers toughness. |
Anti-Galling - Compatible with most
stainless, carbon and alloy grades of steel |
Susceptible to galling. Parts can seize
and tear during routine disassembly. |
Easy to machine without the addition of
detrimental additives, such as sulfur and
selenium. |
S, or Se added to 410 to make it easier to
machine (416). That inhibits welding, and
lowers strength. |
| Low carbon levels (.05) |
High carbon levels (.15), lowers corrosion
resistance and toughness. Contributes to
corrosion cracking. |
Low degree of memory. Low degree of
retained stress. Very little movement during
machining or in service. |
High "memory", retained stress causes
bow and twist in thermal treatment,
machining, and in service. |
High degree of wear resistance as
delivered. Can be safely hardened to wear
plate levels of 352 to 425BHN. |
Very low degree of wear resistance.
Further hardening diminishes corrosion
resistance. |
| Welds easily. Welding data is available. |
In 410, higher carbon increases
susceptibility for weld cracks. (416 not
recommended for welding). |
Elevated Nickel content, with additions of
Moly, Columbium and Tantalum for corrosion
resistance, strength and toughness. |
Low chemistry general tool room grade. No
Nickel. Low strength and toughness. |
28RC - Charpy V notch impact of near
120ft/lbs @ 70F. %RA=70, %EL=28 |
28RC - Charpy V notch impact of 38ft/lbs,
70F. %RA=60. %EL=19 |
Stress corrosion test .1% NaCl+.5% Acetic
Acid + H/2S @33RC, 60KSI applied stress.
No findings after 500 hrs |
At 35RC, 60KSI applied stress - visible
change after 3 hours. |
