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low alloy steel plate 09mnnidr for low temperature pressure vessels
1 main use
09mnnidr steel is pure, with good plasticity and welding performance, excellent low temperature impact toughness. used in the manufacture of cryogenic pressure vessel storage tanks with a minimum service temperature of -70 °c.
2 grades and standards
product grade: 09mnnidr
executive standard: gb3531-2008
3 technical conditions of supply
3.1 product specifications
10～80×1500～4000×l;
3.2 chemical composition
table 1 chemical composition, %
牌号 | c≤ | si | mn | ni | nb≤ | p≤ | s≤ | alt≥ |
09mnnidr | 0.12 | 0.15～0.50 | 1.20～1.60 | 0.30～0.80 | 0.04 | 0.020 | 0.012 | 0.020 |
3.3 mechanical properties
table 2 mechanical properties
牌号 | 规格，mm | σb,mpa | σs,mpa | δ5,% | akv, j，横向 | 180°弯曲试验 弯心直径（b≥35mm） |
不小于 | ||||||
09mnnidr | 6～16 | 440～570 | 300 | 23 | 34(-70℃) | d=2a |
＞16～36 | 430～560 | 280 | ||||
＞36～60 | 430～560 | 270 | ||||
＞60～80 | 420～550 | 260 | ||||
3.4交货状态：正火或正火 回火