Products >> Screw Thread Steel Bar

Application of Screw thread bar:
Screw thread bar is a kind of steel with high technical content in China, so it has extremely strict requirements on the grade and quality of products. The products are mainly used in high-speed railway, water conservancy, nuclear power and other oversized buildings, frame structures, Bridges and culverts and other projects.

Type and parameter of Screw thread bar:
The specifications of P PSB500/630, PSB785/930, PSB830/1030, PSB930/1080, PSB1080/1230, PSB1230/13800；The diameter of 15mm、20mm、25mm、28mm、32mm、36mm、40mm、50mm、63.5mm、75mm and so on。

PRESTRESSING THREAD STEEL BAR

Steel grade	Yield strength MPa	Tensile strength MPa	Elongation at failure A%	Uniform elongtion Agt%	Stress relaxation
Steel grade	Yield strength MPa	Tensile strength MPa	Elongation at failure A%	Uniform elongtion Agt%	Original stress	Relaxation rate after 1000h r/%	Ralaxation rate after 10 r/%
PSB500	≥500	≥630	≥10		0.8R	≤3	≤1.5
PSB555	≥555	≥777	≥5				≤1.5
PSB785	≥785	≥980	≥7	≥3.5
PSB830	≥830	≥1030	≥6
PSB930	≥930	≥1080	≥6
PSB1080	≥1080	≥1230	≥6	≥2.5
PSB390	≥390	≥560	≥18

Nominal Diameter mm	Dv mm	Dh mm	H mm	B mm	L mm	Nominal sectional area mm2	Nominal Weight Kg/M
15	15	15	1	4.5	10	176	1.47
18	18	18	1.2	4	9	254.5	2.11
20	20	20	1.3	4.8	10	314	2.47
25	25	25	1.6	6	12	490.9	4.1
32	32	32	2.0	7	16	804.2	6.65
36	36	36	2.2	8	18	1018	8.41
40	40	40	2.5	8	20	1256.6	10.34
50	50	50	3.0	9	24	1963.5	16.28
63.5	63	63.5	3.0	--	22	--	26.2
75	74.5	75	3.0	--	20	--	36.1