AM355 Stainless Steel
Nickel and Molybdenum. The special property of AM355 is that it hardens when it is heated and thus the end result depends upon the heat treatment given to this metal.
AM355 has the strength of a heat-treatable martensitic grade along with some chromium-nickel austenitic grades’ corrosion resistance. Alloy 355 may have a martensitic structure and high strength comparable to other martensitic stainless steels, depending on the heat treatment, or it may have an austenitic structure and formability similar to other austenitic stainless steels.
Blades, knives, industrial cutters, discs, rotors, shafts, and similar parts requiring great strength at moderately higher temperatures are all made of AM 355.
| Steel Grade | Fe 500, Fe 500D, Fe 550, Fe 415, CRM |
| Specifications | UNS S35500, AISI 634, AMS 5547, AMS 5549, AMS 5743, AMS 5744, ASTM A-564, ASTM A-579, ASTM A-593, ASTM A-705, MIL-S-8840 |
| Standard | BS4449, ASTM A615, ASTM A706, JIS G3112, JIS G3109 |
| Thickness | 0.1875 inches to 6.50 inches |
| Length | 300mm to 18000m or any desired length |
| Width | 10mm to 2500mm |
| Applications | · Blades
· Knives · Industrial Cutters · Discs · Rotors · Shafts · Aerospace |
AM355 Stainless Steel Available Forms
AM355 Stainless Steel Typical Mechanical Properties
| Alloy | Temperature | Yield Strength | Tensile Strength |
| AM355 | 850°F | 980-1250 MPa | 1500 |
| AM355 | 1000°F | 1020-1180 MPa | 1300 |
AM355 Stainless Steel Chemistry
| C | Mn | Si | P | S | Cr | Ni | Mo | N | |
| Min | 0.10 | 0.50 | 15 | 4 | 2.50 | 0.07 | |||
| Max | 0.15 | 1.25 | 0.50 | 0.40 | 0.30 | 16 | 5 | 3.25 | 0.13 |
AM355 Stainless Steel Corrosion Resistance
In comparison to other martensitic stainless steels that are quench-hardenable, alloy am355 offers better corrosion resistance. It provides good resistance to a variety of moderate chemical conditions as well as air corrosion. Due to carbide precipitation at the grain boundaries, material in the double-aged, equalised, and overtempered conditions is vulnerable to intergranular corrosion. AM355 stainless steel, however, is not vulnerable to intergranular assault when it is toughened by extremely low cooling.
AM355 Stainless Steel Workability
Alloy AM355’s hot working properties are comparable to those of other chromium-nickel stainless steels. It is manufactured at a maximum temperature of 2100 °F and finished at a temperature between 1700 and 1800 °F. As a result, this alloy becomes more ductile and workable.
Alloy AM355 is handled much the same way as stainless steels from the AISI type 300 family when it is annealed. However, it undergoes work hardening at a high rate that is comparable to AISI Type 301. This alloy is sufficiently ductile in the hardened state to allow for a small amount of shaping and straightening operations. Cold working improves the strength of this alloy.
The same procedures used for other stainless steels—rigid tool and work supports, slower speeds, positive cuts, absence of dwelling or glazing, and sufficient coolant—must be followed for alloy 355 to be successfully machined. AM355 is machined better when it is hot-worked. Some of our machining services include CNC turning, forming, drilling, reaming, milling, and broaching.
The shielded fusion and resistance welding methods may successfully weld alloy AM355 together. We anneal this metal after welding to provide the best possible balance of strength, flexibility, and corrosion resistance.
