What is 06Cr25Ni20 stainless steel pipe?

If you are looking for high-temperature stainless steel pipes for furnace equipment, heat treatment systems, petrochemical plants, or thermal processing applications, 06Cr25Ni20 stainless steel pipe is one of the most widely selected heat-resistant grades in China and international markets.

06Cr25Ni20 stainless steel is the Chinese GB/T designation equivalent to AISI 310S / UNS S31008 stainless steel. It is an austenitic heat-resistant stainless steel with approximately 25% chromium and 20% nickel, providing excellent oxidation resistance, carburization resistance, and high-temperature strength.

Compared with common grades such as 304 and 316 stainless steel pipes, 06Cr25Ni20 is designed for environments where continuous exposure to temperatures above 900°C is required.

 

06Cr25Ni20 Piping Standard

Standard	Application
ASTM A312	Pressure piping and high-temperature applications
GB/T 14976	Chinese industrial stainless seamless pipes
EN 10216-5	European pressure applications

 

What is 06Cr25Ni20 stainless steel equivalent to?

Standard	Chinese GB/T	American ASTM/AISI	UNS	European EN	Japanese JIS
Designation	06Cr25Ni20	310S	S31008	1.4845	SUS310S

 

Chemical Composition (%)

Element	Carbon (C)	Silicon (Si)	Manganese (Mn)	Phosphorus (P)	Sulfur (S)	Chromium (Cr)	Nickel (Ni)
Value	≤ 0.08	≤ 1.50	≤ 2.00	≤ 0.045	≤ 0.030	24.00 – 26.00	19.00 – 22.00

 

Mechanical Properties (at Room Temperature 20°C)

Property	Metric Value	Imperial Value
Tensile Strength (Rm)	≥ 515 MPa	≥ 75 ksi
Yield Strength (Rp0.2)	≥ 205 MPa	≥ 30 ksi
Elongation (A5)	≥ 35 %	≥ 35 %
Hardness (Brinell)	≤ 187 HBW	-
Hardness (Rockwell B)	≤ 90 HRB	-

 

High-Temperature Resistance of 06Cr25Ni20 Stainless Steel Pipe

06Cr25Ni20 stainless steel pipe can maintain oxidation resistance in continuous service around:

Temperature Condition	Performance
800°C–900°C	Excellent long-term oxidation resistance
900°C–1050°C	Suitable for furnace applications
Above 1100°C	Depends on atmosphere and stress conditions

 

310S vs. 304 vs. 316 Stainless Steel: Heat Resistance

Grade	Cr Content	Ni Content	Recommended Temperature Range
TP304	18–20%	8–10.5%	≤800°C
TP316L	16–18%	10–14%	≤850°C
06Cr25Ni20 / 310S	24–26%	19–22%	900–1100°C

Selection Advice:
For normal corrosion environments, 304/316 are economical choices.
For furnace tubes, radiant tubes, and high-temperature exhaust systems, 310S is usually the safer choice.

 

Applications of 06Cr25Ni20 Stainless Steel Pipe

Industry	Application
Heat Treatment	Furnace tubes, heating elements support tubes
Petrochemical	Cracking furnace pipes
Chemical Industry	High-temperature reaction pipelines
Power Generation	Boiler furnace components
Cement Industry	Kiln equipment
Food Processing	High-temperature processing equipment
Metallurgy	Heat treatment lines

 

How to Choose Between 06Cr25Ni20 and Other Heat Resistant Grades?

Requirement	Recommended Grade
General corrosion resistance	TP304
Chloride corrosion	TP316L
High temperature 900–1100°C	06Cr25Ni20 / 310S
Extreme oxidation resistance	253MA
High carburization resistance	310S / Alloy materials

 

If you need more help, please tell me:What dimensions (outer diameter and wall thickness) do you need?Are you looking for seamless or welded pipes?What is the operating temperature or application?

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Why Choose GNEE for 06Cr25Ni20 Stainless Steel Pipe?

If you are sourcing 06Cr25Ni20 (310S) stainless steel pipes for high-temperature industrial projects, GNEE offers the following products and services:
1. Manufacturing compliant with ASTM A312, GB, and EN standards
2. Seamless and welded pipes: a wide range of outer diameters, from small-bore tubing to large-scale industrial piping
3. Supplied in the solution-annealed condition
4. Support for 100% PMI (Positive Material Identification) verification
5. Provision of EN 10204 3.1 material certificates and support for third-party inspections (e.g., SGS, BV, TUV)

 

 

All GNEE stainless steel products are supplied with full material certification, including EN 10204 3.1 MTC, chemical composition analysis, mechanical test reports, and heat number traceability to ensure 100% material authenticity and project compliance.

 

06Cr25Ni20 Stainless Steel Pipe Inspection Requirements

Professional suppliers should provide:

Inspection Item	Purpose
PMI Test	Verify alloy composition
Chemical Analysis	Confirm Cr/Ni content
Mechanical Test	Tensile strength and elongation
Hydrostatic Test	Leak detection
Eddy Current Test	Weld/seam inspection
Ultrasonic Test	Internal defect detection
Dimension Inspection	OD and WT tolerance control

 

FAQ

Is 06Cr25Ni20 stainless steel the same as 310S?

Yes, 06Cr25Ni20 stainless steel is the Chinese national standard (GB/T) equivalent designation for 310S (UNS S31008). Both share the core 25% chromium and 20% nickel austenitic composition designed for high-temperature service.

 

What temperature can 06Cr25Ni20 stainless steel pipe withstand?

06Cr25Ni20 stainless steel pipe (equivalent to grade 310S) can withstand continuous temperatures up to 1150°C (2102°F) and short-term peak temperatures up to 1200°C (2192°F). Its high melting point is between 1398°C and 1454°C.

 

What is the difference between 06Cr25Ni20 and 304 stainless steel?

The main difference between 06Cr25Ni20 (Chinese GB standard equivalent to AISI 310 / UNS S31008) and 304 stainless steel lies in their chemical composition, temperature tolerance, and intended use. 06Cr25Ni20 contains significantly higher levels of chromium and nickel, making it a high-temperature heat-resisting steel, whereas 304 is a general-purpose austenitic stainless steel.

 

Is 06Cr25Ni20 stainless steel pipe suitable for furnace tubes?

Yes, 06Cr25Ni20 stainless steel pipe (widely known as AISI 310S) is very suitable and commonly used for furnace tubes. It features high amounts of chromium (24%–26%) and nickel (19%–22%) which give it great strength and protection at high heat.