Description
416 Round Bars
416 Round Bars is a free machining basic straight chromium high hardenability martensitic stainless steel with excellent machinability, reasonable strength and corrosion resistance. Generally supplied in the Annealed Condition with a maximum Brinell hardness of 207. Characterised by excellent machinability, non-galling and non-seizing properties due to its higher sulphur content which has the effect of lowering its corrosion resistance. It is however resistant to mild corrosive atmospheres, fresh water, steam, organic materials, many mild acids and petroleum products, coupled with reasonable strength in the hardened and tempered condition. SS416 due to its excellent hardenability is capable of being through hardened up to Rc40 depending upon carbon content and section size. Small sections can be air cooled and larger sections oil quenched for maximum through hardness. Pre hardened and tempered 416 will also respond readily to nitriding achieving a typical surface hardness of over Rc65. The nitriding process however reduces the corrosion resistance and is therefore not generally recommended except for critical applications where the benefit outweighs all other considerations.
416 stainless is a High Sulphur version of 410. The added Sulphur gives it high machinability, therefore 416 is classed as a free-machining martensitic, considered to have the best machinability of any stainless grade.
Size Range :
Round Bars : 6mm to 200 mm Dia
416 Chemical Composition of SS416 :
| Elements | Min. | Max. |
| Carbon | 0.06 | 0.15 |
| Silicon | – | 1.00 |
| Manganese | – | 1.50 |
| Chromium | 12.00 | 14.00 |
| Phosphorous | – | 0.040 |
| Sulphur | 0.15 | 0.35 |
| Molybdenum | – | 0.06 |
Related Specifications :
- • BS 416S21
- • BS EN56AM
- • EN 1.4005
- • AISI 416
- • SUS 416
- • X12CrS13
- • UNS S41600
Applications of SS 416 Round Bars :
• Automotive components
• General engineering
• Gears
• Valves & Pumps
• Automatic Screw Machined Parts
• Motor Shafts
• Washing Machine Components
• Bolts and Nuts
• Studs
• Gears
Machinability of 416 :
SS416 offers exceptionally good machinability, the highest of any of the commonly available stainless steels. Best machinability is in the sub-critical annealed condition.
