Hardness Values - API

[WendelTrento]

Dear all,

Good afternoon,

The API 6A standard specifies the minimum hardness values for carbon steels with a yield strength of 36K to 75K.



I have a hardness standard from a client that informs the minimum value for steels with a yield strength above the API.

Hardness standard text:

The minimum Brinell hardness values from ISO 10423 or API 6A [1], ISO 13628-4 [3] and API 17D [4] are given in Table 2.



Could you, if possible, inform me from which literature my client obtained these minimum hardness values for steels with a yield strength of 80ksi to 120ksi?

Att,

Wendel Trento

 

[EdStainless]

Do you own and have you read the referenced standards?

 

[A M Contractor]

It looks like specific requirement. Extended though

 

[mrfailure]

ASTM A370 only reports equivalent tensile strength for steel hardness, not yield strength. There may well be some proprietary equivalency but I do not think it is reported in any standards. This is the standard of your customer so you have to make sure you meet it.