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Difference between 10B21 and 10B22 steel

Difference between 10B21 and 10B22 steel

Difference between 10B21 and 10B22 steel

(OP)
What is the difference between 10B21 and 10B22 steel?  Any help is gratefully received.

RE: Difference between 10B21 and 10B22 steel

The manganese content is slightly lower in the 10B21 material 0.6/0.9% compared to 0.7/1.0%

RE: Difference between 10B21 and 10B22 steel

(OP)
If these materials are used in a rivnut application, will the formability (forming of the rivnut)be affected significantly by going with 10B22?  Also - what are the typical properties of these alloys?

RE: Difference between 10B21 and 10B22 steel

I don't believe you would see any significant difference in performance between the two alloys particularly since many heats of material actually meet the analysis specification of both alloys.

RE: Difference between 10B21 and 10B22 steel

I agree with Carburize-- there will be very little difference in performance between 10B21 and 10B22.  In the North American fastener industry, 10B21 has become the standard low carbon Boron-containing grade used for quenching & tempering.  1022 is usually produced without Boron.  ASTM F 2282 (almost identical to IFI-140) has requirements for 10B21, 1022/A, and 1022/B, with the latter two differing slightly in C and Mn limits.  The ductility limits (stated as minimum % reduction in area) are the same for these 3 grades across the various conditions (Annealed, Annealed in Process, Spheroidize Annealed, etc.).  Keep in mind that Boron is only necessary if the parts are to be quenched & tempered.

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