20G U50207 - GB /T 5310-2017

Grade	20G
China ISC	U50207
Corresponding Standard	GB /T 5310-2017 Seamless Steel Tubes and Pipes for High Pressure Boiler
Classification	Carbon Steel

20G Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr ^①	Ni ^①	Cu ^①	Mo ^①	V ^①
Minimum Value	0.17	0.17	0.35	-	-	-	-	-	-	-
Maximum Value	0.23	0.37	0.65	0.025	0.015	0.25	0.25	0.2	0.15	0.08

* Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaseer, except for finishing the cast. The manufacturer shall take all appropriate measures to prevent the addition of these elements from scrap or other materials used in steelmaking, which may adversely affect the mechanical properties and usability.

20G Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Hardness HBW	Impact Energy Absorption KV2 J
Normalizing 880~940°C	410~550	or ReL ≥245	long. ≥24 tr. ≥22	HBW：120~160 HV：≥125~170	long. ≥40 tr. ≥27

Approximate Comparison Table Seamless Steel Tubes and Pipes for High Pressure Boiler

China		United States	European Standard
GB	ISC	ASTM/AISI	EN
20G	U50207	SA-106 B SA-210 A-l	P235GH

20G Corresponding Standards(Same grade name, different standards)

1	GB 713-1997
	20g U50202
2	GB 5310-2008
	20G U50207
3	GB /T 5310-2017
	20G U50207
4	GB /T 5310-2023
	20G U50207
5	GB 5310-1995
	20G U50207

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