ASTM A588 / A588M polat

Atmosfera poslama garşylygy bilen iň ýokary hasyl nokady 50 ksi [345 MPa] çenli ýokary güýçli pes erginli gurluş polat üçin standart spesifikasiýa.
Gerekli ASTM G101 Poslama garşylyk görkezijisi ≥ 6.0 bolmaly. Kebşirlenen köprülerde we binalarda adaty ulanyşdan başga-da, spesifikasiýa ýolagçy demirýol awtoulaglarynda hem ulanylýar.

Aýratynlyklary:
Galyňlygy: 3mm - 150mm
Giňligi: 30mm - 4000mm
Uzynlygy: 1000mm - 12000mm
Standart: ASTM EN10025 JIS GB

ASTM A588 Himiki düzümi

A588 Polat düzümi
	A synp	B synp	K synp		C synp
Uglerod	0.19%	0.2%	0.17%		0.17%
Marganes	0.8-1.25%	0.75-1.35%	0.50-1.20%		0.50-1.20%
Fosfor	0.03%	0.03%	0.03%		0.03%
Kükürt	0.03%	0.03%	0.03%		0.03%
Silikon	0.30-0.65%	0.15-0.50%	0.25-0.50%		0.25-0.50%
Nikel	0.4%	0.5%	0.4%		0.4%
Hrom	0.4-0.65%	0.4-0.7%	0.4-0.7%		0.4-0.7%
Molibden	...	...	0.1%		0.1%
Mis	0.25-0.4%	0.2-0.4%	0.3-0.5%		0.3-0.5%
Wanadim	0.02-0.10%	0.01-0.10%	...
Kolumbium	...	...	0.005-0.05%		0.005-0.05%

Plastinanyň aýratynlyklary

A588 synp aýratynlyklary

GRADE	PIKIR	TENSILE KSI	YIELD KSI	% UZAK. MIN
				8 "	2 "
A588	.75 "THRU 4"	70MIN	50 YP MIN	16	19
	> 4 "THRU 4"	67MIN	46 YP MIN	-
	> 5 "THRU 8"	63MIN	42 YP MIN

Sypatlar
Dartyş: 70 ksi min (4 dýuým we ondan aşak), 67 ksi min (4-5) 63 ksi min (5-8-den ýokary)
Hasyllylygy: 50 ksi min (4 we ondan aşak), 46 ksi min (4-5) 42 ksi min (5-8-den ýokary)
Uzalma: 8 dýuýmda 16 göterim min, 2 dýuýmda 19 göterim min (24 dýuýmdan has giň tabaklar üçin).
Adaty ulanyş
Bu polat köprüleri, binalary we beýleki desgalary öz içine alýan iň oňat amaly edip, boýagsyz galdyrylyp bilner.