ASTM A333 Grade 6 Pipe Supplier | Jizhong Low Temperature Steel Pipe Manufacturer

ASTM A333 Grade 6 pipe is a widely used material for low-temperature service, especially in environments below -45℃. It provides a minimum yield strength of 240 MPa and a tensile strength of 415 MPa, making it a reliable choice for critical industrial applications.

ASTM A333 Standard Overview

The ASTM A333 specification covers seamless and welded steel pipes for low-temperature service and other applications where notch toughness is required.

The standard includes both ERW (electric resistance welded) and seamless types, covering both carbon steel and alloy steel materials.

ASTM A333 Chemical Composition Requirements

Chemical Composition of ASTM A333
Element	Grade 1, %	Grade 3, %	Grade 4, %	Grade 6, %	Grade 7, %	Grade 8, %	Grade 9, %	Grade 10, %	Grade 11, %
C	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	0.90	0.40–1.06	1.15–1.50	0.60
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	0.40	2.03–2.57	8.40–9.60	1.60–2.24	0.25	35.0–37.0
Cr			0.44–1.01	0.30				0.15	0.50
Cu			0.40–0.75	0.40			0.75–1.25	0.15
Al			0.04–0.30	...				0.06
V				0.08				0.12
Cb				0.02				0.05
Mo				0.12				0.05	0.50
Co									0.50

*For Grade 1 and 6, each reduction of 0.01% C below 0.30%, an increase of 0.05 % Mn above 1.06 % would be permitted to a max. of 1.35%.
*For Grade 6, the limit for columbium may be increased up to 0.05 % on heat analysis and 0.06 % on product analysis.
*Generally, the carbon equivalent C.E = [C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15] shall not exceed 0.43% by heat analysis.

ASTM A333 Mechanical Properties

ASTM A333	Tensile Strength, min.		Yield Strength, min.		Elongation %, min.
Grade	psi	MPa	psi	MPa	Longitudinal	Transverse
Grade 1	55 000	380	30 000	205	35	25
Grade 3	65 000	450	35 000	240	30	20
Grade 4	60 000	415	35 000	240	30	16.5
Grade 6	60 000	415	35 000	240	30	16.5
Grade 7	65 000	450	35 000	240	30	22
Grade 8	100 000	690	75 000	515	22
Grade 9	63 000	435	46 000	315	28
Grade 10	80 000	550	65 000	450	22
Grade 11	65 000	450	35 000	240	18

Grades Available Under ASTM A333

ASTM A333 includes 9 grades: Grade 1, 3, 4, 6, 7, 8, 9, 10, and 11.
Each grade differs in chemical composition and mechanical properties, allowing buyers to select the right material for their specific project requirements.

Heat Treatment Process

All pipes manufactured to ASTM A333 (except Grades 8 and 11) are heat treated to ensure stable microstructure and performance. Common methods include:

Normalizing at temperatures above 815 °C, then air cooling or furnace cooling.
Controlled hot working in the range of 845–945 °C, followed by suitable tempering.
Quenching and tempering for Grades 1, 6, and 10 to improve toughness.
Special treatments such as quenched & tempered or double normalized & tempered for Grade 8, and annealing plus normalizing for Grade 11.

These treatments ensure durability and consistent performance in harsh operating conditions.

Jizhong Supply Range

As a professional ASTM A333 pipe manufacturer and supplier, Jizhong provides:

Standards: ASTM A333/A333M, ASME SA333
Grades: 1, 3, 4, 6, 7, 8, 9, 10, 11
Outer Diameter: NPS 1/8” to NPS 20” (10.13mm – 1219mm)
Wall Thickness: SCH 10 to SCH 160, XS, XXS (1.24mm – 25.4mm)
Length: 20ft–40ft (5.8m – 12m)
Ends: Plain, beveled, or threaded
Coatings: 3LPE, FBE, galvanized

Why Choose Jizhong for ASTM A333 Pipes?

Experienced Manufacturer: Decades of production expertise in seamless and welded pipes.
Strict Quality Control: Pipes meet ASTM/ASME international standards with full traceability.
Flexible Supply: Wide range of sizes, coatings, and finishing to meet project specifications.
Global Export Capability: Reliable supply to oil, gas, chemical, and energy industries worldwide.

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