r值 n值 Q/ BQB402 - 2 0 03 J I S G3141 - 1 9 96 GB/ T52 13 - 2 0 01 Q/ BQB402 - 1 9 99
<0.60 0.60~<1.0 1.0~<1.6 ≥1.6 不小于 不小于
SPCC 一般用 ≤0.12 ≤0.50 ≤0.035 ≤0.025 ≥0.020 - 270 34 36 37 38 SPCC SPCC - SPCC
SPCD 冲压用 ≤0.10 ≤0.45 ≤0.035 ≤0.025 ≥0.020 - 270 36 38 39 40 SPCD SPCD - SPCD
SPCE、SPCEN 深冲用 ≤0.08 ≤0.40 ≤0.025 ≤0.020 ≥0.020 210 270 38 40 41 42 SPCE SPCE SC1 SPCE、SPCEF、
SPCEHF、SPCEZF
SPCEN SPCEN SC2