Industrial Materials

Carbon Steel, Stainless Steel, Alloy Steel & Wear Resistant Materials

Explore Sunny Steel's comprehensive material library covering metallic alloys, wear-resistant materials and engineering plastics for pipes, fittings, boilers, heat exchangers and abrasion-resistant systems.

Sunny Steel Enterprise Ltd. is a manufacturer specializing in abrasion-resistant pipes, wear-resistant steel pipes, and composite pipeline solutions. Their main focus is on high-performance materials for harsh industrial environments such as mining, power plants, metallurgy, cement, and chemical industries.

Steel Pipe Material Overview

Different industrial projects face distinct challenges including heavy static/dynamic loads, extreme high/low temperatures, sustained high pressure, chemical corrosive media and abrasive slurry wear. Our complete range of carbon, low alloy, heat-resistant Cr-Mo alloy and stainless steel seamless pipe materials can perfectly match every service environment across construction, automotive, plant engineering, process industry, municipal infrastructure and mining sectors. Each material grade comes with standardized mechanical performance and reliable long-term stability. Browse our full material groups to select the optimal steel grade tailored to your project design parameters.

Material grade selection directly determines pipeline service life, safety and maintenance cost. Mild carbon steel applies to general medium-pressure clean media and ordinary load structures; low-alloy high-strength steel fits heavy-load, low-temperature outdoor infrastructure and vehicle chassis; Cr-Mo heat-resistant alloy is designed for power plant and refinery high-temperature high-pressure process piping; stainless steel provides outstanding resistance against acid, alkali and chloride corrosion for pharmaceutical, food and chemical process lines. All materials comply with global GB, ASTM, EN and DIN standards with complete batch test documentation.

Full series carbon, alloy and stainless steel raw tube materials for global industrial engineering projects

Complete seamless steel pipe material portfolio covering carbon, low alloy, heat-resistant alloy and stainless steel grades

International Material Standard Systems

Standard System Main Standard Documents Material Coverage
Chinese GB Standard GB/T8162, GB/T8163, GB5310, GB/T14976 Carbon, low alloy, boiler alloy, stainless steel pipes
US ASTM Standard A106, A335, A519, A312 Carbon, Cr-Mo heat alloy, mechanical alloy, stainless tubing
European EN Standard EN10210, EN10216, EN10305 Structural, process, automotive precision seamless tubes
German DIN Standard DIN2391, DIN2448 Cold drawn precision tubes for machinery & automotive

1. Mild Carbon Steel Pipe Materials

Grade Equivalent Foreign Grade Core Feature Typical Application Fields
20# A106 Gr.B, C45 Good weldability, cost-effective, medium pressure resistance Municipal water/gas pipelines, general plant auxiliary piping, simple steel frames
45# ST45, 1045 High hardness after heat treatment, good machinability Automotive steering sleeves, mechanical transmission shaft blanks

Carbon steel can be processed into hot-dip galvanized or 3PE coated pipes to improve anti-corrosion performance for outdoor municipal infrastructure.

2. Low Alloy High Strength Structural Materials

Grade Equivalent Foreign Grade Core Feature Typical Application Fields
16Mn / Q345 E355 / ST52 High yield strength, excellent low-temperature impact toughness Bridges, offshore wind frames, truck chassis, cold-region infrastructure
4130 / 4140 Alloy 4130CrMo, 42CrMo High fatigue resistance, heavy load bearing capacity Off-road vehicle hydraulic cylinders, mining heavy mechanical parts

Normalized NBK delivery state is recommended for Q345/E355 when used in cold climate and coastal marine projects.

3. Cr-Mo Heat Resistant Alloy Materials (Power & Process Plant)

Grade ASTM Equivalent Max Service Temp Typical Application Fields
15CrMoG A335 P11 / WP11 ≤580℃ Medium temperature boiler headers, refinery heating pipelines
12Cr2Mo1G A335 P22 / WP22 ≤600℃ Power plant superheater, high-temperature chemical reaction piping
10Cr9Mo1VNb A335 T91 / P91 ≤620℃ Ultra-supercritical thermal power main steam pipelines

All Cr-Mo alloy pipes must undergo full annealing + tempering heat treatment to guarantee long-term creep resistance under sustained high pressure and heat.

4. Anti-Corrosion Stainless Steel Materials

Grade Standard Reference Core Anti-Corrosion Performance Typical Application Fields
304 ASTM A312, GB/T14976 Resist weak acid, oxidation and atmospheric rust Food processing, general chemical clean medium pipelines
316L ASTM A312, EN10216-5 Excellent chloride & strong acid resistance, low carbon anti-intergranular corrosion Pharmaceutical synthesis, seawater desalination, pickling workshop piping

Stainless steel sanitary tubes can be internally mirror polished to Ra ≤0.8μm for sterile pharmaceutical and food production lines.

Standard Heat Treatment Delivery States For All Materials

Mark Code Treatment State Applicable Material & Processing Scene
BK Cold Finished Hard Precision sleeves without bending processing (automotive, machinery)
BKW Stress Relieved Slightly bent structural tubes, general frame materials
GBK Fully Annealed Complex multi-angle bending components, cold forming parts
NBK Normalized Low-temperature projects, heavy-load structural & alloy boiler tubes

Quick Material Selection Guide For Different Industrial Sectors

Civil & Infrastructure Construction

  • General municipal water/gas: 20# / A106 Gr.B
  • Bridges, offshore wind, cold zone projects: Q345 / E355
  • Coastal anti-corrosion: HDG 20# / Q345 or 316L stainless

Automotive & Mechanical Engineering

  • Car chassis & suspension arms: E355 / ST52
  • Steering sleeves, transmission blanks: 45#
  • Heavy-duty hydraulic cylinders: 4130 / 4140 Cr-Mo alloy

Power Plant & Process / Chemical Industry

  • Medium temp boiler pipeline: 15CrMoG / P11
  • High-temperature main steam line: 12Cr2Mo1G / P22, T91
  • Acid, pharmaceutical, food medium: 304 / 316L stainless steel

Mining Abrasive Working Conditions

  • Mine ventilation & general structural support: Q345
  • Abrasive slurry transmission pipelines: thick-wall Q345 wear-resistant modified
  • Heavy mining machinery hydraulic components: 4140 alloy steel

Mandatory Material Inspection Before Delivery

Chemical Composition Test

  • PMI spectral analysis to verify C, Si, Mn, Cr, Mo, V alloy element content
  • Strict impurity element control (S, P) to guarantee material toughness

Mechanical Performance Test

  • Tensile test: yield strength, tensile strength, elongation rate
  • Low-temperature impact toughness test for low alloy structural materials
  • Hardness test, flattening & flaring forming performance test

EN 10204 3.1 / 3.2 MTC material test certificates are provided for every batch, including full chemical spectrum and mechanical test data for tender submission and third-party audit.

Stainless Steel & Nickel Alloys

Frequently Asked Questions
Mild carbon steel, low alloy high strength structural steel, Cr-Mo high temperature heat resistant alloy and 304/316L corrosion resistant stainless steel seamless pipe materials.
Q345 / E355 low alloy steel with normalized NBK delivery state, featuring excellent low-temperature impact resistance and high structural strength.
15CrMoG(P11), 12Cr2Mo1G(P22) and T91 ferritic Cr-Mo alloy for different temperature grade boiler and refinery piping systems.
316L stainless steel, widely applied in pharmaceutical, seawater desalination and chemical pickling process pipelines.
BK cold hard, BKW stress relieved, GBK fully annealed, NBK normalized, selected according to customer bending, welding and low-temperature usage requirements.
Complete EN 10204 3.1/3.2 MTC reports including PMI chemical spectrum analysis, tensile, impact hardness mechanical test records.
E355 / ST52 low alloy high strength steel with outstanding cold bending and welding performance.
Yes, we provide hot-dip galvanizing, 3PE coating, pickling passivation and internal mirror polishing service based on different base pipe materials.
Hot Products

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.

The White Glove Service You Deserve

When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.

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Materials delivered on-time and at a fair price

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No delays in production or manufacturing process

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Meet engineering specifications to ensure top quality

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World-class customer service ready to help