A333 Seamless & Welded Steel Pipe

ASTM A333 is the standard specification for seamless and welded carbon and alloy steel pipe for low temperature applications or other applications requiring notch toughness. This standard covers several grades of ferritic steel: Grade 3, Grade 4, Grade 6, Grade 7, Grade 8, Grade 9, Grade 10 and Grade 11.

Carbon Steel: Properties, Production, Examples and Applications

Carbon steel is an iron-carbon alloy, which contains up to 2.1 wt.% carbon. For carbon steels, there is no minimum specified content of other alloying elements, however, they often contain manganese. The maximum manganese, silicon and copper content should be less than 1.65 wt.%, 0.6 wt.% and 0.6 wt.%, respectively.

Types of carbon steel and their properties

Carbon steel can be classified into three categories according to its carbon content: low-carbon steel (or mild-carbon steel), medium-carbon steel and high-carbon steel . Their carbon content, microstructure and properties compare as follows:

Carbon content (wt.%)	Microstructure	Properties	Examples
Low-carbon steel	< 0.25	Ferrite, pearlite	Low hardness and cost. High ductility, toughness, machinability and weldability	AISI 304, ASTM A815, AISI 316L
Medium-carbon steel	0.25 – 0.60	Martensite	Low hardenability, medium strength, ductility and toughness	AISI 409, ASTM A29, SCM435
High-carbon steel	0.60 – 1.25	Pearlite	High hardness, strength, low ductility	AISI 440C, EN 10088-3

Carbon Steel Description

Grade:

1)GB: Q195, Q215, Q235A, Q235B, Q235C, Q235D, Q255A, 255B, Q275, Q295A, Q295B, Q345B, Q345C, Q345D, Q345E, Q390A, Q390B, Q390C,Q390D, Q390E, Q420, Q420B, Q420C, Q420D, Q420E, Q460D, Q460E, Q500D, Q500E, Q550D, Q550E, Q620D, Q620E, Q690D, Q690E

2)EN: S185,S235JR, S275JR, S355JR, S420NL, S460NL S500Q, S550Q, S620Q, S690Q

3)ASTM: Grade B, Grade C, Grade D, A36, Grade 36, Grade 40, Grade42, Grade 50, Grade 55, Grade 60, Grade 65, Grade 80

4)JIS: SS330, SPHC, SS400, SPFC, SPHD, SPHE

PRODUCT DETAILS

A333
Seamless & Welded Steel Pipe Description

The
main components of A333 seamless steel pipe include iron, carbon, chromium,
nickel, manganese and other elements. Chromium has excellent corrosion resistance, while the addition
of nickel further enhances the corrosion resistance and toughness of the
material. A333
seamless steel pipe has high strength and hardness, as well as good
plasticity and toughness. These excellent mechanical properties make A333
seamless steel pipe an ideal choice in many high-strength,
high-corrosion-resistant application scenarios. A333 seamless steel pipe is
commonly used to transport oil and natural gas with high temperature and high
pressure owing to the excellent sealing and corrosion resistance.

Product Parameters
Product Name	A333 Seamless & Welded Steel Pipe
Standard	EN/DIN/JIS/ASTM/BS/ASME/AISI etc.
Outer Diameter	Seamless: 1/4″-36″	Welding: 21.3mm-3620mm
	Round Tube: 1/2″-10″	Square Tube/Rectangular Tube: 15x15mm-400x600mm
Wall Thickness	Seamless: 1.25mm-50mm	Welding: 1.65mm-65mm
Length	3-12 meters, Support customization
Surface Process	Bright, Polished, Black
Other Services	Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

Chemical Composition
A333	Grade1	Grade3	Grade4	Grade6	Grade7	Grade8	Grade9	Grade10	Grade11
C	0.3	0.19	0.12	0.3	0.19	0.13	0.2	0.2	0.1
Mn	0.40-1.06	0.31-0.64	0.50-1.05	0.29-1.06	0.9	0.9	0.40-1.06	1.15-1.50	0.6
P	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.035	0.025
S	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	0.10 min	0.13-0.32	0.13-0.32	–	0.10-0.35	0.35
Ni	–	3.18-3.82	0.47-0.98	0.4	2.03-2.57	8.40-9.60	1.60-2.24	0.25	35.0-37.0
Cr	–	–	0.44-1.01	0.3	–	–	–	0.15	0.5
Cu	–	–	0.40-0.75	0.4	–	–	0.75-1.25	0.15	–
Al	–	–	0.04-0.30	–	–	–	–	0.06	–

Mechanical Properties
A333	Tensile Strength min.		Yield Strength min.		Elongation % min.
Grade	psi	MPa	psi	MPa	Vertical	Transverse
Grade1	55 000	380	30 000	205	35	25
Grade3	65 000	450	35 000	240	30	20
Grade4	60 000	415	35 000	240	30	16.5
Grade6	60 000	415	35 000	240	30	16.5
Grade7	65 000	450	35 000	240	30	22
Grade8	100 000	690	75 000	515	22	–
Grade9	63 000	435	46 000	315	28	–
Grade10	80 000	550	65 000	450	22	–
Grade11	65 000	450	35 000	240	18	–