410/420 Stainless Steel Bar
UNS S41000/UNS S42000
Stainless steel 410/420, also known as UNS S41000 and UNS S42000, is considered a basic martensitic stainless steel. Comprised of 11.5% to 13.5% chromium and iron, along with trace amounts of other elements including carbon, manganese, phosphorus, silicon, and sulfur. After heat treatment, Stainless Steel 410 exhibits high mechanical properties, it is magnetic in both hardened and annealed conditions. Upon specification, Stainless Steel 410 can be delivered in a hardened, yet still machinable state for uses where moderate corrosion resistance and high strength are required. Stainless Steel 410 reaches maximum corrosion resistance when hardened, tempered and polished. It can be welded using most common welding methods, hot worked between 2000° F and 2200° F, as well as, cold formed and annealed. Because of all of these traits it is widely considered the “general purpose grade” of stainless steel.
UNS S42000, commonly known as Stainless Steel 420 is the high carbon content version of Stainless Steel 410. Corrosion resistance is similar between the two, but Stainless Steel 420 additionally provides increased strength and hardness. Like Stainless Steel 410 it is also considered a “general purpose grade” including at least 12% chromium, which is enough to give it acceptable corrosion resistance. Typically, Stainless Steel 420 achieves its best corrosion resistance when the alloy is hardened and polished, or surface ground.
Industries that use 410 & 420 include:
- Automotive
- Dental/Medical
- Electrical
- Food processing
- Forging
- Petrochemical
- Tool
- Tractor
Products partially or completely constructed of 410 & 420 include:
- Bearings
- Bushings
- Cutlery
- Dies
- Fasteners
- Hand tools
- Plastic molds
- Pump shafts
- Screens
- Steam/Gas
- Surgical instruments
- Turbine blades
- Valves/Valve components
| 410 COND A | Stocking Diameters | 1/2” to 16” |
|---|---|---|
| Material Lengths | Up to 24’ | |
| 410 COND HT ASTM A-479 COND 2 STRESS RELIEVED | Stocking Diameters | 1/2” to 7” |
| Material Lengths | Up to 24’ | |
| 420 COND A | Stocking Diameters | 1/2” to 14” |
| Material Lengths | Up to 24’ |
| Uns | Type | Ams | Astm | Federal | Characteristics |
|---|---|---|---|---|---|
| S41000 | 410 | 5613 | A-276 A-314 A-479 A-493 |
QQ-S-763 | 410 is a low cost general purpose stainless steel, that hardens at 35-39 RC and is used widely where corrosion is not severe. |
| S42000 | 420 | 5621 | A-276 A-314 |
QQ-S-763 | 420 is similar to 400, but the raised carbon content produces higher strength and hardness. Heat treatment to 50 RC min. |
| C | MN | P | S | SI | CR | NI | MO | CU | OTHER | M/NM |
|---|---|---|---|---|---|---|---|---|---|---|
| .15 | 1. | .04 | .03 | 1. | 11.5 – 13.5 | .75 | .5 | .5 | Al .05 Sn .05 N .08 |
M |
| C | MN | P | S | SI | CR | NI | MO | CU | OTHER | M/NM |
|---|---|---|---|---|---|---|---|---|---|---|
| .15 Min. | 1. | .04 | .03 | 1. | 12. – 14. | .5 | .5 | .5 | M |
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