莱芜日标矩形管执行标准

莱芜日标矩形管执行标准
日标方矩管：4氧化脱碳敏感性模具在加热过程中，如果产生氧化、脱碳现象，就会改变模具的形状和性能，影响模具的硬度、耐磨性和使用寿命，招致模具早期失效。有些钼含量高的模具钢，由于容易氧化、脱碳，有一段时间限制了其推广应用，直到热处理工艺装备发展以后，采用特种热处理工艺（如真空热处理，可控气氛热处理、盐浴热处理等）以后，能够避免氧化、脱碳，这类模具钢，才顺利得到推广应用。钼基合金虽然具有极为的高温性能，但是由于在高温下极易氧化，严重地限制了其应用范围。

日标矩形管尺寸表：
20x20x2MM (SHS) SQUARE STEEL HOLLOW SECTION (1.12 KG/M)
40x25x2MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (1.83 KG/M)
20x20x2.5MM (SHS) SQUARE STEEL HOLLOW SECTION (1.35 KG/M)
40x25x2.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (2.23 KG/M)
25x25x2MM (SHS) SQUARE STEEL HOLLOW SECTION (1.43 KG/M)
50x20x2MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (1.96 KG/M)
25x25x2.5MM (SHS) SQUARE STEEL HOLLOW SECTION (1.74 KG/M)
50x25x2.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (2.62 KG/M)
25x25x3MM (SHS) SQUARE STEEL HOLLOW SECTION (2.04 KG/M)
50x25x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (3.07 KG/M)
30x30x2MM (SHS) SQUARE STEEL HOLLOW SECTION (1.68 KG/M)
50x30x2.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (2.92 KG/M)
30x30x2.5MM (SHS) SQUARE STEEL HOLLOW SECTION (2.14 KG/M)
50x30x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (3.45 KG/M)
30x30x3MM (SHS) SQUARE STEEL HOLLOW SECTION (2.51 KG/M)
50x40x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (3.77 KG/M)
40x40x2MM (SHS) SQUARE STEEL HOLLOW SECTION (2.31 KG/M)
60x30x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (3.77 KG/M)

日标方矩型管理重表：
80x40x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (12.80 KG/M)
70x70x3MM (SHS) SQUARE STEEL HOLLOW SECTION (6.28 KG/M)
80x50x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (5.66 KG/M)
70x70x3.6MM (SHS) SQUARE STEEL HOLLOW SECTION (7.46 KG/M)
80x50x4MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (7.34 KG/M)
70x70x5MM (SHS) SQUARE STEEL HOLLOW SECTION (10.11 KG/M)
90x50x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (6.13 KG/M)
70x70x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (12.50 KG/M)
90x50x3.6MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (7.24 KG/M)
70x70x8MM (SHS) SQUARE STEEL HOLLOW SECTION (15.30 KG/M)
90x50x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (9.70 KG/M)
80x80x3MM (SHS) SQUARE STEEL HOLLOW SECTION (7.22 KG/M)
100x50x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (6.60 KG/M)
80x80x3.6MM (SHS) SQUARE STEEL HOLLOW SECTION (8.59 KG/M)
100x50x4MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (8.86 KG/M)
80x80x5MM (SHS) SQUARE STEEL HOLLOW SECTION (11.70 KG/M)
100x50x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (10.90 KG/M)
80x80x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (14.40 KG/M)
100x50x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (13.40KG/M)
80x80x8MM (SHS) SQUARE STEEL HOLLOW SECTION (17.80 KG/M)
100x50x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (16.60 KG/M)
90x90x3.6MM (SHS) SQUARE STEEL HOLLOW SECTION (9.72 KG/M)
100x60x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (7.22 KG/M)
90x90x5MM (SHS) SQUARE STEEL HOLLOW SECTION (13.30 KG/M)
100x60x3.6MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (8.59 KG/M)
90x90x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (16.40 KG/M)
100x60x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (11.70 KG/M)

日标方矩管理论重量表：
100x60x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (14.40KG/M)
100x100x3MM (SHS) SQUARE STEEL HOLLOW SECTION (8.69 KG/M)
100x60x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (17.80 KG/M)
100x100x4MM (SHS) SQUARE STEEL HOLLOW SECTION (12.00 KG/M)
120x60x3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (8.01 KG/M)
100x100x5MM (SHS) SQUARE STEEL HOLLOW SECTION (14.80 KG/M)
120x60x3.6MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (9.72 KG/M)
100x100x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (18.40 KG/M)
120x60x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (13.30 KG/M)
100x100x8MM (SHS) SQUARE STEEL HOLLOW SECTION (22.90 KG/M)
120x60x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (16.40KG/M)
100x100x10MM (SHS) SQUARE STEEL HOLLOW SECTION (27.90 KG/M)
120x80x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (14.80 KG/M)
120x120x5MM (SHS) SQUARE STEEL HOLLOW SECTION (18.00 KG/M)
120x80x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (18.40KG/M)
120x120x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (22.30 KG/M)
120x80x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (22.9 KG/M)
120x120x8MM (SHS) SQUARE STEEL HOLLOW SECTION (27.90 KG/M)
120x80x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (27.9 KG/M)
120x120x10MM (SHS) SQUARE STEEL HOLLOW SECTION (34.20 KG/M)
150x75x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (16.37 KG/M)
120x120x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (41.60 KG/M)

日标型钢：
为了再选尾矿，从原生产系统一直到尾矿坝干坡段，建立了6个尾矿再选回收点，年产精矿13万t，东鞍山磁铁矿不易被塔尔油和氧化石蜡皂吸附上来，造成磁铁矿大部分留在尾矿中，现已投资2万元，建立了2个尾矿再选加收点，年产精矿3万t，其工艺流程见图12。鞍钢齐大山选矿厂尾矿再选厂齐大山铁矿以假象和半假象赤铁矿为主，与大孤山.东鞍山铁矿石对比，其铁矿物嵌布粒度较粗，尾矿品味为1%--13%.齐大山选矿厂至今已投资8万元，建立了6个尾矿再选回收点，全部采用在尾矿输送管道下部旁接支管截流尾矿，采用一段粗选.二段精选的重选工艺，获得*终精矿。