Approximate Hardness Conversion Numbers for Cartridge Brass (70% Copper 30% Zinc Alloy) - Table

Sep 17, 2026

Uploaded by Mabel

Approximate hardness conversion values for cartridge brass with 70% copper and 30% zinc. The chart correlates Rockwell hardness numbers (HRB and HRF), Rockwell superficial hardness numbers (HR 15T, HR 30T, HR 45T), and Vickers hardness (HV) with Brinell hardness (HBS) using specified indenter geometries and loads. Values are presented in tabular form across hardness levels, with certain entries marked as unavailable or not applicable. References include ASM International hardness testing guidance and ASTM designation E140-12b.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Hardness Conversion Table

Hardness Scales and Indenters

Conversion Values (Continued)

004 Approximate Hardness Conversion Numbers for Cartridge Brass (70% Copper 30% Zinc Alloy) Rockwell Hardness Number Rockwell Superficial Hardness Number Vickers Hardness (HV) B Scale 1/16" Ball 100 kgf (HRB) F Scale 1/16" Ball 60 kg (HRF) 15T Scale 1/16" Ball 15 kgf (HR 15T) 30T Scale 1/16" Ball 30 kgf (HR 30T) 45T Scale 1/16" Ball 45 kgf (HR 45T) Brinell 10mm Ball 500 kgf (HBS) | 196 | 93.5 | 110.0 | 90.0 | 77.5 | 66.0 | 169 | | --- | --- | --- | --- | --- | --- | --- | | 194 | … | 109.5 | … | … | 65.5 | 167 | | 192 | 93.0 | … | … | 77.0 | 65.0 | 166 | | 190 | 92.5 | 109.0 | … | 76.5 | 64.5 | 164 | | 188 | 92.0 | … | 89.5 | … | 64.0 | 162 | | 186 | 91.5 | 108.5 | … | 76.0 | 63.5 | 161 | | 184 | 91.0 | … | … | 75.5 | 63.0 | 159 | | 182 | 90.5 | 108.0 | 89.0 | … | 62.5 | 157 | | 180 | 90.0 | 107.5 | … | 75.0 | 62.0 | 156 | | 178 | 89.0 | … | … | 74.5 | 61.5 | 154 | | 176 | 88.5 | 107.0 | … | … | 61.0 | 152 | | 174 | 88.0 | … | 88.5 | 74.0 | 60.5 | 150 | | 172 | 87.5 | 106.5 | … | 73.5 | 60.0 | 149 | | 170 | 87.0 | … | … | … | 59.5 | 147 | | 168 | 86.0 | 106.0 | 88.0 | 73.0 | 59.0 | 146 | | 166 | 85.5 | … | … | 72.5 | 58.5 | 144 | | 164 | 85.0 | 105.5 | … | 72.0 | 58.0 | 142 | | 162 | 84.0 | 105.0 | 87.5 | … | 57.5 | 141 | | 160 | 83.5 | … | … | 71.5 | 56.5 | 139 | | 158 | 83.0 | 104.5 | … | 71.0 | 56.0 | 138 | | 156 | 82.0 | 104.0 | 87.0 | 70.5 | 55.5 | 136 | | 154 | 81.5 | 103.5 | … | 70.0 | 54.5 | 135 | | 152 | 80.5 | 103.0 | … | … | 54.0 | 133 | | 150 | 80.0 | … | 86.5 | 69.5 | 53.5 | 131 | | 148 | 79.0 | 102.5 | … | 69.0 | 53.0 | 129 | | 146 | 78.0 | 102.0 | … | 68.5 | 52.5 | 128 | | 144 | 77.5 | 101.5 | 86.0 | 68.0 | 51.5 | 126 | | 142 | 77.0 | 101.0 | … | 67.5 | 51.0 | 124 | | 140 | 76.0 | 100.5 | 85.5 | 67.0 | 50.0 | 122 | | 138 | 75.0 | 100.0 | … | 66.5 | 49.0 | 121 | | 136 | 74.5 | 99.5 | 85.0 | 66.0 | 48.0 | 120 | | 134 | 73.5 | 99.0 | … | 65.5 | 47.5 | 118 | | 132 | 73.0 | 98.5 | 84.5 | 65.0 | 46.5 | 116 | | 130 | 72.0 | 98.0 | 84.0 | 64.5 | 45.5 | 114 | | 128 | 71.0 | 97.5 | … | 63.5 | 45.0 | 113 | | 126 | 70.0 | 97.0 | 83.5 | 63.0 | 44.0 | 112 | | 124 | 69.0 | 96.5 | … | 62.5 | 43.0 | 110 | | 122 | 68.0 | 96.0 | 83.0 | 62.0 | 42.0 | 108 | | 120 | 67.0 | 95.5 | … | 61.0 | 41.0 | 106 | | 118 | 66.0 | 95.0 | 82.5 | 60.5 | 40.0 | 105 | | 116 | 65.0 | 94.5 | 82.0 | 60.0 | 39.0 | 103 | | 114 | 64.0 | 94.0 | 81.5 | 59.5 | 38.0 | 101 | | 112 | 63.0 | 93.0 | 81.0 | 59.5 | 37.0 | 99 | | 110 | 62.0 | 92.6 | 80.5 | 58.0 | 35.5 | 97 | | 108 | 61.0 | 92.0 | … | 57.0 | 34.5 | 95 | | 106 | 59.5 | 91.2 | 80.0 | 56.0 | 33.0 | 94 | | 104 | 58.0 | 90.5 | 79.5 | 55.0 | 32.0 | 92 | | 102 | 57.0 | 89.8 | 79.0 | 54.5 | 30.5 | 90 | | 100 | 56.0 | 89.0 | 78.5 | 53.5 | 29.5 | 88 | References: Hardness Testing ASM International, Metals Park, OH 1987 ASTM Designatin E‐140‐12b 004 Approximate Hardness Conversion Numbers for Cartridge Brass (70% Copper 30% Zinc Alloy) (Continued) Vickers Hardness (HV) Rockwell Hardness Number B Scale F Scale 1/16" Ball 1/16" Ball 100 kgf 60 kg (HRB) (HRF) 15T Scale 1/16" Ball 15 kgf (HR 15T) Rockwell Superficial Hardness Number 30T Scale 45T Scale 1/16" Ball 1/16" Ball 30 kgf 45 kgf (HR 30T) (HR 45T) Brinell 10mm Ball 500 kgf (HBS) | 98 | 54.0 | 88.0 | 78.0 | 52.5 | 29.0 | 86 | | --- | --- | --- | --- | --- | --- | --- | | 96 | 53.0 | 87.2 | 77.5 | 51.5 | 26.0 | 85 | | 94 | 51.0 | 86.3 | 77.0 | 50.5 | 24.5 | 83 | | 92 | 49.5 | 85.4 | 76.5 | 49.0 | 23.0 | 82 | | 90 | 47.5 | 84.4 | 75.5 | 48.0 | 21.0 | 80 | | 80 | 37.5 | 78.6 | 72.0 | 41.0 | 7.5 | 72.0 | | 78 | 35.0 | 77.4 | 71.5 | 39.5 | 4.5 | 70.0 | | 76 | 32.5 | 76.0 | 70.5 | 38.0 | 1.0 | 68.0 | | 74 | 30.0 | 74.8 | 70.0 | 36.0 | … | 66.0 | | 72 | 27.5 | 73.2 | 69.0 | 34.0 | … | 64.0 | | 70 | 24.5 | 71.8 | 68.0 | 32.0 | … | 63.0 | | 68 | 21.5 | 70.0 | 67.0 | 30.0 | … | 62.0 | | 66 | 18.5 | 68.5 | 66.0 | 28.0 | … | 61.0 | | 64 | 15.5 | 66.8 | 65.0 | 25.5 | … | 59.0 | | 62 | 12.5 | 65.0

FAQs

What materials composition does this chart cover?

Cartridge brass with 70% copper and 30% zinc alloy.

Which hardness scales are included?

Rockwell (HRB, HRF), Rockwell superficial (HR 15T, HR 30T, HR 45T), Vickers hardness (HV), and Brinell hardness (HBS).

How are the hardness values used in conversions?

The table maps a hardness number on one scale to approximate corresponding values on the other listed scales across a range of hardness levels.

Sep 17, 2026

Uploaded by Mabel

Approximate Hardness Conversion Numbers for Cartridge Brass (70% Copper 30% Zinc Alloy) - Table_Page 1

Open in WPS to view all 2 pages