ASTM A709 steel plate

Ang ASTM A709 ay ang Standard Specification para sa Structural Steel for Bridges at sumasaklaw sa carbon, high-strength low-alloy, at quenched at tempered alloy steels na ginagamit bilang mga structural plate sa pagtatayo ng mga tulay. Nag-aalok ang Gnee ng sumusunod na limang grado ng A709; 36, 50, 50W, HPS 50W at HPS 70W. Ang tatlong mga marka ng panahon na 50W, HPS 50W, at HPS 70W  ay mayroong ASTM G101 na pinahusay na Atmospheric Corrosion Resistance Index na ≥6.0.

A709 Grade 36 Komposisyon ng kemikal Pagsusuri ng init

Makapal mm	Structural steel	Steel Plate				Round Bar na bakal
		≤20	20～≤40	40～≤65	65～≤100	≤20	20～≤40	40～≤100
C,max，%	0.25	0.25	0.25	0.25	0.27	0.26	0.27	0.28
Mn,%	…	…	0.80-1.20	0.80-1.20	0.80-1.20	…	0.60-0.90	0.60-0.90
P,max,%	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04
S,max,%	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
Si	0.40 max	0.40 max	0.40 max	0.15-0.40	0.15-0.40	0.40 max	0.40 max	0.40 max
Cu,min,%	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20

Isang 709 Gr. 36 mekanikal na katangian

A709 na Baitang	makapal mm	Magbigay [MPa]	Makunot [MPa]	Pagpahaba Min %				pagbabawas Min %	HB
				Steel Plate		Structural steel
				8in[200mm]	2in[50mm]	8in[200mm]	2in[50mm]
36[250]	≤100	[250]min	400-550	20	23	20	21	…	…
		[250]min	400min	…	…	20	19	…	…
50[345]	≤100	345min	450min	18	21	18	21F	…	…
50S[345S]	G	345-450HI	450minH	…	…	18	21	…	…
50W[345W] HPS50W[HPS345W]	≤100	345min	485min	18	21	18	21J	…	…
HPS70W[HPS485W]	≤100	485min	585-760	…	19K	…	…	…	…
100 [690], 100W [690W],HPS100W [HPS690W]	≤65	690minB	760-895	…	18K	…	…	L	235-293M
100 [690], 100W [690W],	65-100	620minB	690-895	…	16K	…	…	L	…