20G U50207 - GB 5310-1995

Grade	20G
China ISC	U50207
Corresponding Standard	GB 5310-1995 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	Al ^②
Minimum Value	0.17	0.17	0.35	-	-	-	-	-	-	-	-
Maximum Value	0.24	0.37	0.65	0.03	0.03	0.25	0.25	0.2	0.15	0.08	0.01

• Steel produced by oxygen converter and secondary refining outside the furnace has a nitrogen content not exceeding 0.008%

20G Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
Longitudinal	Normalizing	410~550	≥245	≥24	≥40
Transverse	Normalizing	≥400	≥215	≥22	≥27

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

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

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