20# mingħajr saldatura azzar pajp a baxx karbonju azzar pajp. Karbonju azzar huwa ġeneralment maqsum fi tliet tipi : baxx karbonju azzar , medju karbonju azzar u għoli karbonju azzar. Fost minnhom, 45% 23 azzar huwa medju karbonju azzar, u azzar hawn taħt 45# AZZAR AZZAR UPPER 45% 23 IS BAXX KARBONJU AZZAR. 45# IS għoli karbonju azzar. Jekk hemm le speċjali rekwiżiti għal mingħajr saldatura azzar pajpijiet % 2c 20% 23 mingħajr saldatura azzar pajpijiet huma ġeneralment użati.
20# seamless steel pipe is made of 20# steel, with slightly higher strength than 15#, little quenching, and no temper brittleness. It has high cold deformation plasticity and generally used for bending, rolling, flanging and hammer arching. It has good welding performance in arc welding and contact welding. The thickness is small during gas welding and cracks are prone to occur on parts with strict appearance rekwiżiti jew kumpless forom. The cold drawn or normalized state has better machinability than the annealed state, and is generally used to manufacturing workpieces with low stress and high toughness requirements.
kimika kompożizzjoni:
Karbonju C: 0.17%-0.20%
Silikon Si: 0.17%-0.37%
Manganiż Mn: 0.35%-0.65%
Sulfur S: Less than or equal to 0.035%
Fosfru P: Inqas minn jew equal għal 0.035%
Kromju Cr: Less Than or equal to 0.25%
Nikil Ni: Inqas minn jew equal to 0.25%
Ram Cu: Less than or equal to 0.25%
Mekkaniku proprjetajiet:
Tensile saħħa σb (MPa): Greater than or equal to 410(42)
Rendiment saħħa σs (MPa): Akbar minn jew equal to 245(25)
Titwil δ (%): Greater than or equal to 25
Tnaqqis ta' żona ψ (%): Akbar minn jew equal to 5,
Ebusija: mhux sħana trattat, Less than or equal to 156HB,
Kampjun daqs: Kampjun daqs 25mm
Sħana trattament speċifikazzjonijiet u metallografika struttura :
Saħħan trattament speċifikazzjonijiet: normalizzazzjoni, 910 grad , arja tkessiħ.
Metallografiku struttura: ferrite + perlit.
Jekk il-prodott huwa meħtieġ biex be ikkunsinnat in a a trattat is-sħana stat, it għandu jkun iddikjarat il-kuntratt. Jekk it is mhux iddikjarat, it se be delivered without heat treatment.
