Darajani ifodalash usuli: Po'lat navi uch qismdan iborat: xitoy fonetik alifbosi oquvchanlik kuchini, oquvchanlik qiymatini va sifat darajasi belgisini ifodalaydi. Masalan: Q345B, bu erda:
Q-Po'latning oquvchanligi uchun "qu" xitoycha pinyinning birinchi harfi;
345-Oqim kuchi qiymati, MPa birligi;
B-Sifat darajasi - B darajasi.
Xaridor po'lat plitaning qalinligi yo'nalishi bo'yicha ishlashini talab qilganda, qalinlik yo'nalishi (Z yo'nalishi) unumdorlik darajasini bildiruvchi belgi yuqorida aytib o'tilgan -navbatlardan keyin qo'shiladi, masalan: Q345BZ15.
Ijroiya standarti: GB / T1591-2008ni amalga oshirish.
Q345B po'lat plitasi bir xil po'lat materialdir. Bu past-qotishma po'latdir (m<0.2%) with good overall performance, good low temperature performance, cold stamping performance, welding performance and machinability. It is widely used in bridges, vehicles, ships, buildings, pressure vessels, etc. q represents the yield of this material, and 345 in the back refers to the yield value of this material, around 345mpa. And as the thickness of the material increases, its yield value decreases.
Q345B po'lat plitalari uchun texnik talablar va qo'shimcha xizmatlar:
Past haroratga ta'sir qilish testi
Yakuniy foydalanuvchi talablariga muvofiq kesish va payvandlash
Ba'zi kimyoviy elementlarga nisbatan ko'proq qat'iylik mavjud
EN 10204 FORMAT 3.1/3.2 boʻyicha original tegirmon sinov sertifikati berilgan
GB/T2970, JB4730, EN 10160, ASTM A435, A577, A578 bo'yicha ultratovush tekshiruvi
Kimyoviy tarkibi:
C: 0,20% dan kam yoki unga teng,
Si 0,50% dan kam yoki unga teng,
Mn: 1,70% dan kam yoki teng,
P 0,035% dan kam yoki unga teng,
S: 0,035% dan kam yoki unga teng,
Nb 0,07% dan kam yoki teng,
V: 0,15% dan kam yoki unga teng,
Ti 0,20% dan kam yoki teng,
Cr 0,30% dan kam yoki unga teng,
Ni: 0,50% dan kam yoki teng,
Cu: 0,30% dan kam yoki teng,
N: 0,012% dan kam yoki unga teng,
Mo: 0,10% dan kam yoki unga teng
Mexanik xususiyatlar
Hosildorlik kuchi:
16 mm dan kichik yoki unga teng: 345 dan katta yoki teng,
16-40 mm: 335 dan katta yoki teng,
40-63 mm: 325 dan katta yoki teng,
63-80 mm: 315 dan katta yoki teng,
80-100 mm: 305 dan katta yoki teng,
100-150 mm: 285 dan katta yoki teng,
150-200 mm: 275 dan katta yoki teng.
Kuchlanish kuchi: 450-630.
Cho'zilish: 17 dan katta.
Ta'sir sinovi: Sinov harorati: 20 daraja: 34 dan yuqori.
