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Leaf spring raw material spring steel flat bar with JIS SUP6 spring steel Product Chemical Composition (%) STANDARD C Si Mn Cr V P S GB SAE JIS DIN ≤ 65Mn 1066 0.62-0.70 0.17-0.37 0.90-1.20 ≤0.25 0.035 0.035 60Si2Mn 9260 SUP6 60Si7 0.56-0.64 1.50-2.00 0.60-0.90 ≤0.35 0.035 0.035 60Si2MnA 9260 SUP7 60Si7 0.56-0.64 1.60-2.00 0.60-0.90 ≤0.35 0.025 0.025 …
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