ASTM A333 Grade 6 Pipe

zhao77jie — Fri, 21 Mar 2025 08:20:14 +0000

On December 12, 2024, we received an inquiry from an old customer in Vietnam, requiring a batch of ASTM A333 Grade 6 steel pipes. We have cooperated with this customer many times before.

After receiving the quotation, the customer was very interested in the price and delivery time, and asked if we had produced similar products before. We provided the customer with product pictures and packaging pictures of previous orders, and the customer was very satisfied.

One month later, we received a purchase order from the customer. The list is as follows:

NO	Description	Material
1	PIPE Ø168.3*10.97 L=0.25M	SA-333 GR.6
2	PIPE Ø219.1*12.7 L=0.35M	SA-333 GR.6
3	PIPE Ø273*12.7 L=0.2M	SA-333 GR.6
4	PIPE Ø356*19.05 L=0.5M	SA-333 GR.6
5	PIPE Ø406.4*12.7 L=0.5M	SA-333 GR.6
6	PIPE Ø406.4*9.53 L=1M	SA-333 GR.6
7	PIPE Ø88.9*15.2 L=3.3M	SA-333 GR.6

ASTM A333 Grade 6 (A333 Gr.6) is a seamless and welded carbon steel pipe designed for low-temperature applications, ensuring high impact toughness. It is widely used in industries such as oil & gas, petrochemical, power plants, and refineries.

Manufacturing Process:

Available in Seamless & Welded types

Heat Treatment: Normalized, Quenched & Tempered (if required)

Hydrostatic Testing & Non-Destructive Testing (NDT) performed

ASTM A333 Grade 6 Pipe Specification

Processing Method	Seamless and Welded
Size Range	1/8″- 48″ / DN6 – 1200
Thickness Schedule	SCH 10, SCH 20, SCH 40, STD, XS, SCH 100, SCH 120, SCH 160, XXS
Length	6m or 12 m or Random
Standard	ASME B36.10M
Surface Treatment	Blasting and Painting , Epoxy Powder FBE, 2PE, 3PE Coating
Material Grade	ASTM A106B / A53, API 5L B / X42 / 46 / 52 / 56 / 60 / 65 / 70, A333 GR 6

Equivalent Grades Of Grade 6 ASTM A333 Pipe

	Former		New
Execution	Standard	Material	Standard	Material
Seamless	ASTM A333	GRADE 6	EN 10216-4	P265NL

DIN	EN	BS	NFA	ASTM	ASME
DIN 17178 Grade FGP 28	EN P265NL Grade 10216-4	NFA A 36-2051) Grade A 42 AP	ASTM A333 Grade6	ASME SA 333 Grade 6	UNI C20

ASTM A333 Grade 6 Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Cu	Ni	Cr	Mo	V	Nb
ASTM A333 GR 6	MIN		0.29			0.10
ASTM A333 GR 6	MAX	0.30	1.06	0.025	0.025		0.40	0.40	0.30	0.12	0.08	0.02

ASTM A333 Grade 6 Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %
ASTM A333 GR 6	415 min	240 min	30 min

Carbon Steel Pipe Thickness Schedule

DN	NPS	OD	SCH20	SCH30	STD	SCH40	SCH60	XS	80
6	1/8	10.3	–	1.45	1.73	1.73	–	2.41	2.41
8	1/4	13.7	–	1.85	2.24	2.24	–	3.02	3.02
10	3/8	17.1	–	1.85	2.31	2.31	–	3.20	3.20
15	1/2	21.3	–	2.41	2.77	2.77	–	3.73	3.73
20	3/4	26.7	–	2.41	2.87	2.87	–	3.91	3.91
25	1	33.4	–	2.90	3.38	3.38	–	4.55	4.55
32	11/4	42.2	–	2.97	3.56	3.56	–	4.85	4.85
40	11/2	48.3	–	3.18	3.68	3.68	–	5.08	5.08
50	2	60.3	–	3.18	3.91	3.91	–	5.54	5.54
65	21/2	73.0	–	4.78	5.16	5.16	–	7.01	7.01
80	3	88.9	–	4.78	5.49	5.49	–	7.62	7.62
90	31/2	101.6	–	4.78	5.74	5.74	–	8.08	8.08
100	4	114.3	–	4.78	6.02	6.02	–	8.56	8.56

How to inspect ASTM A333 Grade 6 pipes

1. Visual & Dimensional Inspection

Surface defects: Checked for cracks, seams, and other imperfections.

Dimensions: Outer diameter (OD), wall thickness, and length are measured per ASME B36.10M/B36.19M.

2. Chemical Composition Analysis

Performed using spectro analysis or wet chemical methods to verify compliance with ASTM A333 Grade 6 chemical composition requirements.

3. Mechanical Testing

✔ Tensile Test: Ensures minimum tensile strength (415 MPa) and yield strength (240 MPa).
✔ Hardness Test: Measures material hardness to ensure uniformity.
✔ Impact (Charpy V-Notch) Test: Conducted at -45°C (-50°F) to ensure toughness in low-temperature environments.

Key Features & Benefits:

✅ High toughness at low temperatures (-45°C / -50°F)
✅ Good weldability and machinability
✅ Suitable for pressure vessel & piping applications
✅ Complies with ASME B31.3, ASME B31.1, and API 5L standards

Common Applications:

Cryogenic & Low-Temperature Services
Oil & Gas Pipelines
Chemical & Petrochemical Processing
Power Plants & Refineries
Pressure Vessel Piping

The post ASTM A333 Grade 6 Pipe appeared first on Quality Manufacturer of Industrial Pipe Fittings.

ASTM A333 Pipe Archives | Quality Manufacturer of Industrial Pipe Fittings