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Contact Supplier321 stainless steel mainly used to produce high pressure and above pressure of steam boiler pipeline, excellent quality carbon pigment structure steel, alloy structure steel, non-rust heat-resistant seamless steel tube, these boiler tube often worked in high temperature and high pressure, since pipe would oxidation and corrosion in high temperature, the pipe required to be high tensile strength, high anti-oxidation performance and good organization stability.
Chemical composition: c: ≤ 0.08, si: ≤ 1.00, mn: ≤ 2.00, s: ≤ 0.030, p: ≤ 0.035
cr: 17.00 ~ 19.00, ni: 9.00 ~ 12.00, ti: ≥ 5 × c% [2]
mechanical properties tensile strength σb (mpa): ≥ 520conditions yield strength σ0.2 (mpa): ≥ 205elongation δ5 (%): ≥ 40reduction of area ψ (%): ≥ 50
hardness: ≤ 187hb; ≤ 90hrb; ≤ 200hv
321 stainless steel used in the manufacturing of various structures, as low pressure boiler superheated steam pipes, water pipes and locomotive boiler superheated steam, smoke pipes, small pipes and arch brick work of high quality carbon structural steel hot rolling and drawing (rolling) seamless steel pipe.