SS 420.
SS 420 is a higher-carbon martensitic stainless.
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Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
Quick details
| Material grade | SS 420 (UNS S42000) |
|---|---|
| Forms | Sheets & plates, Round bars |
| Usage / application | Cutlery and blades, Surgical and dental instruments, Plastic moulds |
| Test certificate | Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request. |
| Business type | Stockist and supplier |
| Location | 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India |
Also searched as: SS 420, stainless steel 420, 420, UNS S42000, W.Nr 1.4021, X20Cr13
Product information for purchasing teams
SS 420 is a higher-carbon martensitic stainless. After hardening it reaches higher hardness than 410, so it is used for cutlery, surgical and dental instruments, moulds, and wear parts that need a hard edge with some corrosion resistance.
Exact specification, availability and commercial details are confirmed against your enquiry.
Product forms and standards
| Form | Standard |
|---|---|
| Sheets & plates | ASTM A240 Type 420 |
| Round bars | ASTM A276 Type 420 |
Related designation references
| Grade | UNS | Werkstoff Nr. | EN / BS | JIS |
|---|---|---|---|---|
| SS 420 | S42000 | 1.4021 | X20Cr13 | SUS 420J1 |
Cross-standard references are not automatic substitutes. Confirm the exact product form, specification, composition, class and condition before accepting a substitution.
Chemical composition, %
| Grade | C | Mn | Si | P | S | Cr |
|---|---|---|---|---|---|---|
| SS 420 | ≥ 0.15 | ≤ 1.00 | ≤ 1.00 | ≤ 0.040 | ≤ 0.030 | 12.0 – 14.0 |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | Depends on heat treatment |
| Hardness, annealed | ≤ 241 HB |
| Hardness, hardened | Up to about 50 HRC |
Values per ASTM A276. Properties depend on the hardening and tempering cycle.. Confirm against the current edition of the standard and your purchase specification.
Density: 7.74 g/cm³
Applications
- Cutlery and blades
- Surgical and dental instruments
- Plastic moulds
- Pump shafts and valve parts
Questions buyers ask
What are the equivalent grades of SS 420?
SS 420 is UNS S42000, Werkstoff 1.4021, EN X20Cr13 and JIS SUS 420J1. Cross-standard references are not automatic substitutes; verify the product form, standard, composition and condition.
In which forms is SS 420 available?
Sheets & plates to ASTM A240 Type 420; Round bars to ASTM A276 Type 420.
What is the density of SS 420?
About 7.74 g/cm³ (7,740 kg/m³).
Where is Steel Impex India located?
Steel Impex India is at 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India We supply across India.