310S, 309S, 253MA, S30815, S31008... Heat-resistant seamless pipes are used for

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Outer Diameter Range	14mm~219mm(Customizable)
Surface condition	0.2~0.4um(Customizable)
mentation standards	GB,ASTM/ASMB/ASME SA,EN10217-7,JISG,JISG,DIN11850...
Supply status	Profiles, tubes, bars...(Customizable)
Packaging Details	negotiate
Wall Thickness Range	1mm~14mm(Customizable)
Range of lengths	1000mm~12000mm(Customizable)
Supply Ability	negotiate
Delivery Time	negotiate
Material (steel grade)	310S,309S,253MA,S30815,S31008...
Certification	Customizable
Place of Origin	China, South Korea, Japan, the United States, Germany, Sweden
Model Number	Customizable
Brand Name	Qin Shan...

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Product Specification


Outer Diameter Range	14mm~219mm(Customizable)	Surface condition	0.2~0.4um(Customizable)
mentation standards	GB,ASTM/ASMB/ASME SA,EN10217-7,JISG,JISG,DIN11850...	Supply status	Profiles, tubes, bars...(Customizable)
Packaging Details	negotiate	Wall Thickness Range	1mm~14mm(Customizable)
Range of lengths	1000mm~12000mm(Customizable)	Supply Ability	negotiate
Delivery Time	negotiate	Material (steel grade)	310S,309S,253MA,S30815,S31008...
Certification	Customizable	Place of Origin	China, South Korea, Japan, the United States, Germany, Sweden
Model Number	Customizable	Brand Name	Qin Shan...

All four types are high-alloy heat-resistant austenitic stainless steels, designed as "special forces" specifically for high-temperature service conditions. In simple terms: 309S and 310S are "basic models for high-temperature oxidation resistance", while 253MA (S30815) is an upgraded version optimized for strength and cost on this basis.

A comparison of their core properties and industrial applications is as follows:

· 310S (0Cr25Ni20): The top performer in high-temperature oxidation resistance. It has the highest chromium and nickel content (25% Cr / 20% Ni), with a long-term service temperature of up to 1150℃, and excellent oxidation resistance and creep resistance. It is mainly used in extreme high-temperature scenarios such as boiler superheaters, high-temperature furnace tubes, and heat treatment equipment.
· 309S (0Cr23Ni13): A cost-effective choice for medium-temperature ranges. Its heat resistance is slightly lower, with a recommended service temperature below 980℃, but its low carbon content (≤0.08%) gives it significantly better weldability than 310S and strong intergranular corrosion resistance. It is mainly used in medium and high-temperature industrial scenarios such as heating furnace components, heat exchangers, and automotive exhaust parts.
· 253MA (S30815): An economical tough guy with high strength and heat resistance. Featuring a nickel-saving design, it has lower chromium and nickel contents than 310S but is added with rare earth element cerium (Ce) and nitrogen (N). Its short-term high-temperature strength is more than 20% higher than that of 310S, with superior performance in the temperature range of 900-1100℃ and lower cost. It is commonly used in high-temperature pressure-bearing or non-pressure-bearing components such as cement kilns and metallurgical sintering equipment.

How to choose?

· For cost-sensitive applications requiring higher strength (such as pressure-bearing parts above 900℃), choose 253MA, which is cheaper and stronger than 310S.

· For harsh service conditions with long-term operation above 1100℃ and extremely high creep resistance requirements, choose 310S, whose pure high-temperature oxidation resistance is unparalleled.

· For temperatures below 980℃ with high requirements for welding quality, choose 309S, which is sufficient for this range and easy to weld.

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Business Type:

Manufacturer 
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Year Established:

2011 
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Total Annual:

65000000 Dollars-85000000 Dollars
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Employee Number:

50~70 
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Ecer Certification：

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QiuZhi Metal is an integrated company specializing in both the wholesale and processing of stainless steel materials. We serve as the authorized distributors in China for renowned domestic and international steel mills, including TISCO, Zhangjiabu (ZPSS), JISCO, Xi'an Huaxin, Taishan Steel, Dong... QiuZhi Metal is an integrated company specializing in both the wholesale and processing of stainless steel materials. We serve as the authorized distributors in China for renowned domestic and international steel mills, including TISCO, Zhangjiabu (ZPSS), JISCO, Xi'an Huaxin, Taishan Steel, Dong...

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