specification:
1.low cost, high working temperature with good corrosion resistance
2.grades:y10t,y20,y25,y30,y30bh,y35(china standard);c1,c5,c8,c11(u.s.a. standard) hf8/22- hf24/3(europe standard)
3.products manufactured according to iso9001 quality system;
4.coating: no