China · CCS

Grade E620

CCS:2016 — Rules for Materials and Welding

Chemical composition

Element	min	max	Similar	Remarks
C		0.2
Mn		1.7
N		0.02
P		0.03
S		0.03
Si		0.55

Mechanical properties

Heat treatment / condition	Yield strength	Tensile strength	Elongation	Reduction of area	Impact energy	Hardness
steel plates, flats sections	≥620	720–890	≥15 A5
steel plates, flats sections, 10 < t <= 15mm, t			≥11
steel plates, flats sections, 15 < t <= 20mm, t			≥12
steel plates, flats sections, 20 < t <= 25mm, t			≥12
steel plates, flats sections, 25 < t <= 40mm, t			≥13
steel plates, flats sections, 40 < t <= 50mm, t			≥14
steel plates, flats sections, 50 < t <= 70mm, t			≥15
steel plates, flats sections, t <= 10mm, t			≥9

High/low temperature

Impact energy Kv/Ku (J)

Condition	Temperature ℃	min	Remarks
steel plates 、 flat bars and sections ( transverse )	-60	41
steel plates 、 flat bars and sections ( longitudinal )	-60	62	型钢一般仅做纵向冲击试验。
steel plates 、 flat bars and sections ( transverse )	-40	41
steel plates 、 flat bars and sections ( longitudinal )	-40	62	型钢一般仅做纵向冲击试验。
steel plates 、 flat bars and sections ( transverse )	-20	41
steel plates 、 flat bars and sections ( longitudinal )	-20	62	型钢一般仅做纵向冲击试验。
steel plates 、 flat bars and sections ( transverse )	0	41
steel plates 、 flat bars and sections ( longitudinal )	0	62	型钢一般仅做纵向冲击试验。