SG345A - ISO 630-2-2021

Grade	SG345A
Corresponding Standard	ISO 630-2-2021 Structural Steels - Part 2: Technical Delivery Conditions for Structrual Steels for General Purposes
Classification	Alloy Steel

SG345A Chemical Element Composition Content (%)

Component	Si	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	More
Minimum Value	-	-	-	-	-	-	-	-	-	-	V+Nb:≤0.15
Maximum Value	0.55	0.04	0.05	0.35	0.45	0.6	0.15	0.04	0.15	0.05	V+Nb:≤0.15

• The table shows the chemical composition of heat analysis.

◎ There is no requirement for C、Mn, but the amount of these elements shall be determined for each heat and shall be reported in the inspection document

SG345A Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
t≤16	540~695	ReH: ≥345	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*
16＜t≤40	540~695	ReH: ≥335	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*
40＜t≤100	540~695	ReH: ≥325	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*
100＜t≤200	540~695	ReH: ≥315	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*
t＞200	540~695	ReH: ≥305	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*

SG345A Corresponding Standards(Same grade name, different standards)

1	ISO 630-2-2011
	SG345A
2	ISO 630-2-2021
	SG345A

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!