Jun 20 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Welding
Hot Working
Cold Working
Hardening
Applications
Introduction
Stainless steel Custom 455 is an advanced martensitic alloy in the area of precipitation hardening stainless steels. It combines corrosion resistance, one-step age hardenability, ease of fabrication, and yield strength that is thrice the strength of standard stainless grade 304.
The one-step aging treatment provides this material with very good high yield strength coupled with good ductility and toughness.
The following datasheet provides an overview of stainless steel grade Custom 455.
Chemical Composition
The chemical composition of stainless steel grade Custom 455 is outlined in the following table.
|
Element |
Content (%) |
|
Chromium, Cr |
11-12.5 |
|
Nickel, Ni |
7.5-9.5 |
|
Copper, Cu |
1.5-2.5 |
|
Titanium, Ti |
0.80-1.4 |
|
Molybdenum, Mo |
0.50 max |
|
Manganese, Mn |
0.50 max |
|
Silicon, Si |
0.50 max |
|
Columbium, Cb + Tantalum, Ta |
0.10-0.50 |
|
Carbon, C |
0.05 max |
|
Phosphorus, P |
0.040 max |
|
Sulfur, S |
0.030 max |
|
Iron, Fe |
Balance |
Physical Properties
The physical properties of stainless steel grade Custom 455 are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
7.76 g/cm3 |
0.280 lb/in3 |
Mechanical Properties
The following table shows mechanical properties of stainless steel grade Custom 455 (H1000 condition).
|
Properties |
Metric |
Imperial |
|
Tensile strength |
1413 MPa |
204900 psi |
|
Yield strength |
1345 MPa |
195100 psi |
|
Modulus of elasticity |
200 GPa |
29000 ksi |
|
Poisson’s ratio |
0.3 |
0.3 |
|
Elongation at break |
14% |
14% |
|
Hardness, Brinell |
411 |
411 |
|
Hardness, Knoop (estimated from Rockwell C) |
450 |
450 |
|
Hardness, Vickers (estimated from Rockwell C) |
430 |
430 |
|
Hardness, Rockwell C |
44 |
44 |
Other Designations
Other designations that are equivalent to stainless steel grade Custom 455 include the following:.
-
MIL-S-83311
-
AMS 5617 Gr 1 Bar
-
AMS 5617 Gr 2 Bar
-
HMS 6 1093 Rev G
-
AMS 5578 Welded tube
-
ASTM A693 Grade XM16
-
ASTM A564 / ASME SB564
-
AMS 5860 Sheet / strip / plate
Fabrication and Heat Treatment
Machinability
Stainless steel grade Custom 455 stainless has been machined successfully using the same methods used for other high-strength alloys like strong tool, work supports, slower speeds, positive cuts and good quantity of coolant.
Welding
Stainless steel grade Custom 455 can be satisfactorily welded using the shielded fusion and resistance welding processes; however, oxyacetylene welding is not recommended.
Hot Working
Custom 455 stainless steel can be easily forged within the temperature range of 899-1260°C (1650-2300°F).
Cold Working
Cold working can be easily performed although Custom 455 is martensitic in the annealed condition.
Hardening
Stainless steel grade Custom 455 does not respond to heat treatment; however, it responds to cold reduction.
Applications
Stainless steel grade Custom 455 is widely used in applications where standard austenitic grades do not perform well such as strength requirements in corrosive environments.