51QS

300M High performance special-steels-high resistance industry

300M

300M,

300M Datasheet

300M High performance special-steels-high resistance industry: MIL S 8844D Chemical composition

C Si Mn P S Cr Ni Mo V Cu
0.40-0.45 1.45-1.80 0.65-0.90 ≤0.010 ≤0.010 0.70-0.95 1.65-2.00 0.35-0.50 0.05-0.10 ≤0.35

300M High performance special-steels-high resistance industry: MIL S 8844D specification

  • MIL S 8844D - MILITARY SPECIFICATION: STEEL BAR, REFORGING STOCK, AND MECHANICAL TUBING, LOW ALLOY, PREMIUM QUALITY

300M High performance special-steels-high resistance industry - mechanical properties

Heat treatment Min Max Similar Note
mechanical tubing a - 面积 > 930 cm^2 Heat treated 1586
mechanical tubing a - 面积 ≤ 645 cm^2 Heat treated 1586
mechanical tubing 645 < a - 面积 ≤ 930 cm^2 Heat treated 1586
mechanical tubing Heat treated 1586
Heat treatment Min Max Similar Note
mechanical tubing a - 面积 > 930 cm^2 Heat treated 1931
mechanical tubing a - 面积 ≤ 645 cm^2 Heat treated 1931
mechanical tubing 645 < a - 面积 ≤ 930 cm^2 Heat treated 1931
mechanical tubing Heat treated 1931
Heat treatment Min Max Similar Note
Heat treatment Min Max Similar Note
mechanical tubing a - 面积 > 930 cm^2 Heat treated 4
mechanical tubing a - 面积 ≤ 645 cm^2 Heat treated 6
mechanical tubing 645 < a - 面积 ≤ 930 cm^2 Heat treated 5
mechanical tubing Heat treated 7
Heat treatment Min Max Similar Note
mechanical tubing a - 面积 > 930 cm^2 Heat treated 15
mechanical tubing a - 面积 ≤ 645 cm^2 Heat treated 25
mechanical tubing 645 < a - 面积 ≤ 930 cm^2 Heat treated 20
mechanical tubing Heat treated 25
Heat treatment Type Min Max Similar Note
钢管, 退火 HR 99 Hardened 1038℃
棒材, 锻坯, 退火 HR 27

300M MILITARY SPECIFICATION: STEEL BAR, REFORGING STOCK, AND MECHANICAL TUBING, LOW ALLOY, PREMIUM QUALITY


300M High performance special-steels-high resistance industry delivers