Hardness Class A4-20H Material Datasheet
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| Material Number | Material Name | Standard | Scope | Standard Status | Country | Successor | VDA 231-106 classification | |
|---|---|---|---|---|---|---|---|---|
| A4-20H (DIN EN ISO 3506-4 : 2010-04) | Hardness Class A4-20H | DIN EN ISO 3506-4 : 2010-04 | DIN EN ISO 3506-4 : 2010-04 replaced by DIN EN ISO 3506-4 : 2026-06 | Replaced | Germany | Hardness Class A4-20H | 1.1.2 | 1) |
| 1) Remark: Non-stabilized austenitic steels of grade A4 are "acid proof steels", which are Mo alloyed and give a considerably better resistance to corrosion (boiling sulfuric acid, to a certain extent to chloride containing environment). Application: cellulose industry, food industry, shipbuilding |
Chemical Composition
| C [%] | Cr [%] | Cu [%] | Mn [%] | Mo [%] | Ni [%] | P [%] | S [%] | Si [%] | Remainder | |
|---|---|---|---|---|---|---|---|---|---|---|
| blur | blur | blur | blur | blur | blur | blur | blur | blur | blur | 1) |
| 1) Source: blur |
Mechanical Properties
| Condition | Temperature [°C] | Hardness HV | |
|---|---|---|---|
| blur | blur | blur | 1) |
| 1) Source: blur |
Cross Reference
| Material Name | Country | Standard |
|---|---|---|
| A4-20H | Europe | EN ISO 3506-4 |
| A4-20H | International | ISO 3506-4 |
Producer/Supplier/Trade names
| Tradename | Supplier |
|---|---|
| A4-20H | Adolf Würth GmbH&Co. KG, Künzelsau |
| A4-20H | Bossard Deutschland GmbH, Illerrieden |
| A4-20H | BUMAX AB, Åshammar |
| A4-20H | F. REYHER Nchfg. GmbH & Co. KG, Hamburg |
| A4-20H | Lederer GmbH, Ennepetal |
| A4-20H | WASI GmbH, Wuppertal |