ASTM A709 simbi ndiro

Iyo ASTM A709 ndiyo Standard Specification yeStructural Steel yeBridges uye inotenderedza kabhoni, yakakwirira-yakadzika-yakaderera-alloy, uye kudzimwa uye kunyorovesa alloy simbi dzinoshandiswa sezvimiro mahwendefa mukuvaka mabhiriji. Gnee inopa magiredhi mashanu anotevera eA709; 36, 50, 50W, HPS 50W uye HPS 70W. Iwo magiredhi matatu emamiriro ekunze e50W, HPS 50W, uye HPS 70W  ane ASTM G101 yakagadziridzwa Atmospheric Corrosion Resistance Index ye ≥6.0.

A709 Grade 36 Chemical composition Heat analysis

Makobvu mm	Simbi yekuvaka	Steel Plate				Round Bar simbi
		≤20	20～≤40	40～≤65	65～≤100	≤20	20～≤40	40～≤100
C,pamusoro,%	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,pamusoro,%	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	0.40max	0.40max	0.40max	0.15-0.40	0.15-0.40	0.40max	0.40max	0.40max
Cu, min,%	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20

A709 Gr. 36 midziyo yemagetsi

A709 Giredhi	Gobvu mm	Yield [MPa]	Tensile [MPa]	Elongtation Min %				kuderedza Min %	HB
				Steel Plate		Simbi yekuvaka
				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	…