Home > About Us> Tech & Service
New Material

Material Specifications

Our highly-skilled manpower is dedicated to producing the finest quality steel pipe, pipe fittings, meeting a wide variety of material specifications. Their knowledge and experience of metal properties, welding procedures and quality control have set the pace and standard expected by our customers world-wide.

Steel can be categorized into four basic groups based on the chemical compositions:


There are many different grades of steel that encompass varied properties. These properties can be physical, chemical and environmental.

All steel is composed of iron and carbon. It is the amount of carbon, and the additional alloys that determine the properties of each grade.

Commonly fabricated materials and specifications are:
Alloy steel
ASTM A335 P22 alloy steel pipe
Alloy steel is often subdivided into two groups: high alloy steels and low alloy steels. The difference between the two is defined somewhat arbitrarily. However, most agree that any steel that is alloyed with more than eight percent of its weight being other elements beside iron and carbon, is high alloy steel.
Available standard and specification as below:
Product name Executive standard
Seamless Ferritic and Austentic Alloy Steel Boiler, Superheater and Heat-Exchanger Tubes ASTM A213
Wwall seamless and welded carbon and alloy steel pipe intended for use at low temperatures ASTM A333
Seamless Ferritic Alloy Steel Pipe for High-Temperature Service ASTM A335
Seamless Carbon and Alloy Steel for Mechanical Tubing ASTM A519
Stainless Steel
Types of stainless Stock room Types of stainless
Stainless steel does not readily corrode, rust or stain with water as ordinary steel does, but despite the name it is not fully stain-proof, most notably under low oxygen, high salinity, or poor circulation environments. It is also called corrosion-resistant steel or CRES when the alloy type and grade are not detailed, particularly in the aviation industry.

ASTM A-403 et ASME SA-403, AISI 301, 302, 303, 304, 304L, 304H, 304N, 304LN,310,310S, 316, 316L, 316H, 316N, 316LN, 309, 317, 317L, 321, 321H, 347, 347H UNS 31254 (254SMo) 440B Duplex & Super Duplex alloys SAF 2304, SAF 2205, SAF 2507, UNS S31803 - SMO, TP410, TP430, TP405, TP314, 253MA, etc
Carbon Steel

Carbon Steel Seamless PipesCarbon Steel can be segregated into three main categories: Low carbon steel (sometimes known as mild steel); Medium carbon steel; and High carbon steel.

Low Carbon Steel (Mild Steel): Typically contain 0.04% to 0.30% carbon content. This is one of the largest groups of Carbon Steel. It covers a great diversity of shapes; from Flat Sheet to Structural Beam. Depending on the desired properties needed, other elements are added or increased. For example: Drawing Quality (DQ) – The carbon level is kept low and Aluminum is added, and for Structural Steel the carbon level is higher and the manganese content is increased.

Medium Carbon Steel: Typically has a carbon range of 0.31% to 0.60%, and a manganese content ranging from .060% to 1.65%. This product is stronger than low carbon steel, and it is more difficult to form, weld and cut. Medium carbon steels are quite often hardened and tempered using heat treatment.

High Carbon Steel: Commonly known as “carbon tool steel” it typically has a carbon range between 0.61% and 1.50%. High carbon steel is very difficult to cut, bend and weld. Once heat treated it becomes extremely hard and brittle.



Black steel
Black steel is a term given to steel pipe with a black oxide scale on the surface. This black oxide scale is formed when the pipe is forged and is typically sealed with a protective oil to prevent corrosion. Because of this oxide scale and protective film, black steel pipe requires little maintenance and is used for a wide variety of applications, including in water, steam, air and gas services. Black steel pipes are typically cut and threaded in the field.
High-yield low temperature
MSS-SP-75, CSA 245, ASTM A-st420, ASTM A-860, ASTM A-234 & ASME SA-234 Tees & reducing tees, WPB, API 5L, API 5CT, ASTM A53, A106, A120, A161, A179, A192, A199, A200, A210, A261, A333, A335, A376, A671, A672, A691 JIS G3461, JIS G3462, STS 480, DIN 17175, DIN 1629, DIN 17121, BS 2059,WPC Duplex and super duplex
ASTM A-815 & ASME SA-815, UNS 31803, UNS 32750, UNS 32760, UNS 32755, UNS-S 32550
Abrasion resistant pipe
Abrasion resistant pipe applied in coal-fired power plant ash and slag discharge tube, powder, powder tube, desulfurization pipeline,in addition also widely used in the following industries:
 
Properties of the Ceramic-lined Steel Composite Pipes >>
Ceramic (Corundum: a-Al2O3) lined abrasion resistant straight pipe and fittings are lined with highly abrasion resistant ceramic by SHS -------Self-propagating High-temperature Synthetic process.

Abrasion Resistant Steel

Abrasion resistant steel is ideal for applications subjected to constant wear and tear through external elements. It provides high impact applications with a longer working life, requiring less maintenance and repair in the long run. Sunny Steel has a broad inventory of abrasion resistant steel in various sizes to fulfill your metal fabrication needs quickly and efficiently. Standard sizes are held in-stock and custom lengths can be cut per customer specifications.

Abrasion resistant steel works well in earth moving equipment, cement mixers, hoppers, chutes, and other large equipment. We manufacture using laser and plasma cutting, metal forming, rolling, leveling, and industrial welding.

What Is Abrasion Resistant Steel

Abrasion occurs when materials are rubbed across one another over a period of time. Some abrasion is intentional, such as sanding, grinding, and blasting. However, unintentional abrasion can lead to component failure so it is important to use the proper materials to ensure that surface wear does not lead to unanticipated breakdown of structures or parts. While steel in general has excellent resistance to abrasion, not all steels are equal. There are several types of steels that are made particularly to prevent wear, known as abrasion resistant steels.

How Does It Work?

The chemical composition of abrasion resistant steel is one of the attributes that make it more immune to wear than other types of steel. There are several alloys that can be used increase the abrasion resistance. Carbon helps block dislocations, which increases the hardness and strength of a steel. The added carbon also allows the steel to form microstructures with increased hardness when heated and quenched. There are other elements that can be added to abrasion resistant steel to increase its hardness value too. Chromium and manganese are also added to abrasion resistant steels to help reduce the negative effects caused by wear.

Heat treatment is another factor that helps the steel resist abrasion. Abrasion resistant steel must have a microstructure that allows it to have a high hardness. This is accomplished, in part, by adding the proper alloying elements. However, this alone is not enough to ensure the proper microstructure is formed. The steel must also undergo a heating and a rapid quenching process to form microstructures such as martensite and bainite which gives the steel the required high hardness values. Care must be taken when welding or heating abrasion resistant steels. If they are heated to a high enough temperature, it may have an annealing effect on the steel, causing it to lose some of its hardness and, therefore, its abrasion resistance.

What Types of Abrasion resistant pipes Are Available?

There are several different abrasion resistant steel grades. Each grade is typically made to a specific Brinell hardness value, as opposed to other steels that are made with tensile strength and toughness in mind. This is because hardness is one of the most important factors when trying to increase abrasion resistance.

Welcome to order more.

Note:
This inventory is part of the inventory, demand and other models in stock or order materials, please contact us.



Main alloy pipes & tubes

ASTM A213 T11 Seamless alloy pipes
+ ASTM A335 alloy pipe
ASMT A333 Grade 6 seamless pipes
+ ASTM A333 Alloy pipe


支持与服务

Recommended products
Pipe fittings
Pipe fittings are used to connect pipes.
Welded steel pipes Weld steel pipes
We produce an extensive selection of weld steel pipe
Welded steel pipes Anti corrosion pipe
Anti-corrosio pipe is processed through the preservation
Ceramic-Lined Pipes
from a single spool piece to complete piping systems.
Pipe flanges
Pipe flange are a method of connecting pipes, valves.
Pipe Fitting Accessories
We are passionate in Stub Ends, Bolt Sets, Fasteners
Sunny Steel Blog

Copyright © 2011 Sunny Steel Enterprise Ltd.  All Rights Reserved ICP No.:08010763
Sum Xu