ASTM A691 Grade 1CR Seamless Pipes

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ASTM A691 Grade 1CR Seamless Pipes Specification

Connection
Welded / Beveled / Plain End

Product Type
Seamless Pipe

End Protector
Plastic Caps

Application
Oil and Gas Industries, Petrochemical, Power Plants, Refineries

Tolerance
10%

Surface Finish
Polished

Material
ASTM A691 Alloy Steel Grade 1CR

Section Shape
Round

Standard
ASTM A691

Technique
Hot Finished / Cold Drawn

Surface Treatment
Black Painting, Varnished, Anti-Rust Oil, Galvanized, Pickled

Alloy or Not
Alloy

Outer Diameter
1/2 NB to 24 NB (21.3mm to 610mm)

Thickness
2mm to 60mm

Size
Custom Sizes Available

Length
Single Random, Double Random, or Cut Lengths

About ASTM A691 Grade 1CR Seamless Pipes

What Are Specification ASTM A691 Grade 1CR Seamless Pipes?

Grade	Alloy Steel ASTM A691 Cl22, A691 GRADE 1 CR, GRADE 1/2 CR, GRADE 1 1/4 CR, GRADE 2 1/4 CR, GRADE 3 CR, GRADE 5 CR, GRADE 9 CR, GRADE 91, CM 65, CM 70, CM 75
Size	1/2 NB to 36 NB
Thickness	3-12mm
Schedules	SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Class Designation	Class 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 34, 40, 41, 42, 43, 50, 51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73
ASTM A691 Grades	ASTM A691 Gr 11, ASTM A691 Gr.91, ASTM A691 9cr, ASTM A691 5cr, ASTM A691 1 1/4cr Cl22, ASTM A691m, ASTM A691 Gr.5cr Cl22, ASTM A691 Cm70, ASTM A691 Class 22, ASTM A691 Class 42, ASTM A691-91, ASTM A691 Grade 2.1/4cr, ASTM A691 11/4cr Cl22
Origin	European, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material)
Tolerance	Cold drawn pipe: +/-0.1mm Cold rolled pipe: +/-0.05mm
Craft	Cold rolled and Cold drawn
Type	Seamless / ERW / Welded / Fabricated / LSAW Pipes
available in Form of	Round, Square, Rectangular, Hydraulic Etc.
Length	Standard Double & In Cut length also.
End	Plain End, Beveled End, Treaded
Specialized in	Large Diameter ASTM A691 Pipe
Additional Testing	NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc.
Application	Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

Equivalent material Of ASTM A691 Grade 1CR Seamless Pipes?

Pipe Grade	Type of Steel	ASTM Specification		HB, max
Pipe Grade	Type of Steel	Number	Grade	HB, max
CM-65	carbon-molybdenum steel	A204/A204M	A	201
CM-70	carbon-molybdenum steel	A204/A204M	B	201
CM-75	carbon-molybdenum steel	A204/A204M	C	201
CMSH-70	carbon-manganese-silicon steel, normalized	A537/A537M	1
CMS-75	carbon-manganese-silicon steel	A299/A299M
CMSH-80	carbon-manganese-silicon steel, quenched and tempered	A537/A537M	2
1/2 CR	1/2 % chromium, 1/2 % molybdenum steel	A387/A387M	2	201
1 CR	1 % chromium, 1/2 % molybdenum steel	A387/A387M	12	201
1 1/4 CR	1 1/4 % chromium, 1/2 % molybdenum steel	A387/A387M	11	201
2 1/4 CR	2 1/4 % chromium, 1 % molybdenum steel	A387/A387M	22	201
3 CR	3 % chromium, 1 % molybdenum steel	A387/A387M	21	201
5 CR	5 % chromium, 1/2 % molybdenum steel	A387/A387M	5	225
9 CR	9 % chromium, 1 % molybdenum steel	A387/A387M	9	241
91	9 % chromium, 1 % molybdenum, vanadium, columbium	A387/A387M	91	241

Chemical Composition Of ASTM A691 Grade 1CR Seamless Pipes?

	1CR	1-1/4CR	2-1/4 CR	5 CR	9 CR	91
C	0.05-0.17	0.05-0.17	0.05-0.15	0.15	0.15	0.08-0.12
Mn	0.40-0.65	0.40-0.65	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60
P	0.025	0.025	0.025	0.025	0.025	0.020
S	0.025	0.025	0.025	0.025	0.025	0.010
Si	0.15-0.40	0.50-0.80	0.50	0.50	1.00	0.20-0.50
Cr	0.80-1.15	1.00-1.50	2.00-2.50	4.00-6.00	8.00-10.00	8.00-9.50
Mo	0.45-0.60	0.45-0.65	0.90-1.10	0.45-0.65	0.90-1.10	0.85-1.05
V					0.04	0.18-0.25

Mechanical Properties Of ASTM A691 Grade 1CR Seamless Pipes?

Class	Heat Treatment on Pipe Section see:	Radiography, see Section	Pressure Test, see :
10	none	none	none
11	none	9	none
12	none	9	8.3
13	none	none	8.3
21	stress relieved, see 6.3.1	none	none
21	stress relieved, see 6.3.1	9	none
ASTM A691 Class 22	stress relieved, see 6.3.1	9	8.3
23	stress relieved, see 6.3.1	none	8.3
31	normalized, see 6.3.2	none	none
31	normalized, see 6.3.2	9	none
32	normalized, see 6.3.2	9	8.3
33	normalized, see 6.3.2	none	8.3
40	normalized and tempered, see 6.3.3	none	none
43	normalized and tempered, see 6.3.3	9	none
43	normalized and tempered, see 6.3.3	9	8.3
43	normalized and tempered, see 6.3.3	none	8.3
50	quenched and tempered, see 6.3.4	none	none
51	quenched and tempered, see 6.3.4	9	none
52	quenched and tempered, see 6.3.4	9	8.3
53	quenched and tempered, see 6.3.4	none	8.3
60	normalized and precipitation heat none none treated	none	none
61	normalized and precipitation heat none none treated	9	none
62	normalized and precipitation heat none none treated	9	8.3
63	normalized and precipitation heat none none treated	none	8.3
70	normalized and precipitation heat none none treated	none	none
71	normalized and precipitation heat none none treated	9	none
72	normalized and precipitation heat none none treated	9	8.3
73	normalized and precipitation heat none none treated	none	8.3

Precision Engineering for Demanding Applications

ASTM A691 Grade 1CR Seamless Pipes are celebrated for their high performance in industries requiring exceptional strength and toughness. Engineered from premium alloy steel, they withstand harsh operating conditions prevalent in refineries, petrochemical plants, and power stations. The seamless design, combined with advanced heat treatment, ensures a uniform structure and resistance to cracking or deformation.

Comprehensive Quality Assurance

Each pipe undergoes rigorous non-destructive testing, including ultrasonic, eddy current, and radiographic inspections. These stringent tests ensure the pipes are free from internal flaws and meet customer expectations for safety and reliability. Surface treatments such as black painting, varnishing, and galvanizing further protect against corrosion.

Flexible Customization and Secure Packaging

To satisfy unique project needs, these pipes are available in custom sizes, with varied lengths and end finishes like welded, beveled, or plain. They are packaged securely using bundles, wooden boxes, or protective wraps, accompanied by end protectors, ensuring integrity during transport and storage.

FAQs of ASTM A691 Grade 1CR Seamless Pipes:

Q: How are ASTM A691 Grade 1CR seamless pipes manufactured?

A: These pipes are produced using seamless techniques, followed by heat treatments such as normalizing, quenching, and tempering. This manufacturing process enhances their mechanical properties and makes them suitable for high-stress environments.

Q: What inspection methods ensure the quality of Grade 1CR pipes?

A: Every pipe undergoes ultrasonic testing, eddy current testing, and radiographic examination. These non-destructive tests detect internal or surface flaws to guarantee that the pipes meet stringent quality and safety standards.

Q: When should ASTM A691 Grade 1CR seamless pipes be used?

A: They are ideal for critical applications where high strength and toughness are required, such as in oil and gas industries, petrochemical plants, power stations, and refineries.

Q: Where can these pipes be sourced and delivered from?

A: ASTM A691 Grade 1CR seamless pipes are manufactured, supplied, and exported from India to customers worldwide, offered by experienced exporters, manufacturers, suppliers, and traders.

Q: What are the typical applications and usage benefits of these pipes?

A: These pipes are extensively used in high-pressure and corrosive environments within the oil and gas sector, as well as in petrochemical and power generation industries. Their robust construction and surface treatments ensure longevity and reliable service.

Q: How do packaging and delivery options accommodate customer requirements?

A: Pipes are securely packaged in bundles, wooden boxes, or wrapped in plastic, with optional end protectors for safe transport. Orders can be tailored to meet specific customer needs in terms of size, length, and packaging preferences.

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