Astm A333 Notch Toughness Welded Steel Tubes For Low Temperature Service

Standard: ASTM A333, ASTM A370, ASTM A999/A999M, ASTM A671, E23, E165, E709

 

Size range: OD: 4-420mm

WT: 0.5-50mm

Length: 1-12m

 

Material: Q195, Q215, Q235, Q345, Gr1,Gr3,Gr4,Gr6,Gr7,Gr8,Gr9,Gr10,Gr11

 

Test: Transverse or Longfitudinal Tensile Test and Flattening Test

Impact Test

 

Chemical Requirements

Element	Grade1	Grade3	Grade4	Grade6	Grade7	Grade8	Grade9	Grade10	Grade11
C, max	0.30	0.19	0.12	0.30	0.19	0.13	0.20	0.20	0.10
Mn	0.40-1.06	0.31-0.64	0.50-1.05	0.29-1.06	0.90 max	0.90 max	0.40-1.06	1.15-1.50	0.6 max
P, max	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.035	0.025
S, max	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.015	0.025
Si	--	0.18-0.37	0.08-0.37	0.10min	0.13-0.32	0.13-0.32	--	0.10-0.35	0.35max
Ni	--	3.18-3.82	0.47-0.98	0.40max	2.03-2.57	8.40-9.60	1.60-2.24	0.25max	35.0-37.0
Cr	--	--	0.44-1.01	0.30max	--	--	--	0.15max	0.50max
Cu	--	--	0.40-0.75	0.40max	--	--	0.75-1.25	0.15max	--
Al	--	--	0.04-0.30	--	--	--	--	0.06max	--
V	--	--	--	0.08	--	--	--	0.12	--
Nb, max	--	--	--	0.02	--	--	--	0.05	--
Mo, max	--	--	--	0.12	--	--	--	0.05	0.50max
Co	--	--	--	--	--	--	--	--	0.50max

Application:

Carbon steel pipe use for construction ,building filed , low pressure liquid, water, gas, oil, line pipe

 

Surface Treatment:

Galvanized,Oiled,Black Painted (varnish coating),corrosion resistant coating, Anti corrosion coating

 

Technique:

Electronic Resistance Welded (ERW ) SAW Submerged-arc Welded Helical(SAWH) Submerged-arc Welded Longitudinal(SAWL)

 

Material: Fully killed steel, Fine grain steel with a ferritic grain size.

 

Apperance and General:

The weld areas are free from cracks, lack of fusion and lack of penetration
The tubes are free from external surface defects that can be detected by visual examination.