Math & Numbers
Convert between Brinell (HB), Vickers (HV), and Rockwell (HRC / HRB) hardness via ASTM E140 tabulated data with linear interpolation. Three material classes: carbon/alloy steel (HV 100–960), austenitic stainless (HV 100–600), and cartridge brass (HV 40–200). Any input scale produces all the others; a scale that does not apply in the current hardness band returns 'out of range'. Indicative only — not for acceptance testing per ASTM E140.
Call this tool from your code in three languages.
curl -X POST 'https://api.elysiatools.com/en/api/tools/hardness-converter' \
-H 'Content-Type: application/json' \
-d '{"material":"steel","inputScale":"HV","value":200,"decimalPlaces":1}'Send a POST request with your inputs as JSON. File parameters require a separate upload first.
POST https://api.elysiatools.com/en/api/tools/hardness-converter| Name | Type | Required | Description |
|---|---|---|---|
| material | select | No | Material class — ASTM E140 provides separate conversion tables per material because hardness depends on work-hardening behaviour. |
| inputScale | select | No | — |
| value | number | Yes | Hardness value in the selected Input Scale. Must lie within the tabulated ASTM E140 range for the chosen material. |
| decimalPlaces | number | No | — |
JSON result
{
"key": {...},
"metadata": {
"key": "value"
},
"error": "Error message (optional)",
"message": "Notification message (optional)"
}Add this tool to your Model Context Protocol server so AI agents can list and call it.
Add this block to your MCP client configuration:
{
"mcpServers": {
"elysiatools-hardness-converter": {
"name": "hardness-converter",
"description": "Convert between Brinell (HB), Vickers (HV), and Rockwell (HRC / HRB) hardness via ASTM E140 tabulated data with linear interpolation. Three material classes: carbon/alloy steel (HV 100–960), austenitic stainless (HV 100–600), and cartridge brass (HV 40–200). Any input scale produces all the others; a scale that does not apply in the current hardness band returns 'out of range'. Indicative only — not for acceptance testing per ASTM E140.",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=hardness-converter",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}After connecting to the SSE endpoint, list the exposed tools:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Invoke the tool by its id, passing arguments built from its parameters:
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "hardness-converter",
"arguments": {
"material": "steel",
"inputScale": "HV",
"value": 200,
"decimalPlaces": 1
}
}
}Questions or issues? Contact [email protected]