HRc20 25mm Steel Balls , 904L High Precision Stainless Steel Bearing Balls

25.00mm, 904L High Precision Stainless Steel Metal Ball For Bearing

Introduction

Super austenitic stainless steel 904L (00Cr20Ni25Mo4.5Cu; UNS: N08904; EN: 1.4539) is a high-alloy austenitic stainless steel with low carbon content. It has good corrosion resistance in dilute sulfuric acid and is specially designed for corrosion conditions. Designed for harsh environments. It has high chromium content and sufficient nickel content. The addition of copper makes it highly resistant to acid, especially to chloride crevice corrosion and stress corrosion cracking. It is not easy to appear corrosion spots and cracks, and it is resistant to spots. Corrosion ability is slightly better than other steel grades, has good workability and weldability, and can be used in pressure vessels.

Grades and standards:

UNS N08904 (a standard jointly designed by the American Society of Motor Vehicle Engineers and the American Society for Testing and Materials in 1967), DIN1.4539 (German Standard), ASTM A240 (American Society for Testing and Materials Standard; the new standard classifies it as a stainless steel series, The original standard ASME SB-625 classified it as a nickel-based alloy series), SUS890L.

Metallographic structure of 904L stainless steel:
904L is a completely austenitic structure. Compared with austenitic stainless steel with high molybdenum content, 904L is not sensitive to the precipitation of ferrite and α phase.

Physical and mechanical properties:
Density: 8.0g/cm3. Tensile strength: σb≥520Mpa. Elongation: δ≥35%. Corrosion resistance of 904L stainless steel.

904L application fields:

* Petroleum and petrochemical equipment, such as reactors in petrochemical equipment, etc.
* Sulfuric acid storage and transportation equipment, such as heat exchangers, etc.
* Power plant flue gas desulfurization device, the main parts used in the tower body of the absorption tower, flue, gate plate, internal parts, spray system, etc.
* Scrubber and fan in the organic acid treatment system.
* Sea water treatment equipment, sea water heat exchanger, paper industry equipment, sulfuric acid, nitric acid equipment, acid making, pharmaceutical industry and other chemical equipment, pressure vessels, food equipment.
* Pharmaceutical factories: centrifuges, reactors, etc.
* Plant food: soy sauce cans, cooking wine, salt cans, equipment and dressings.
* 904L is a matched steel grade for the strong corrosive medium of dilute sulfuric acid.

The minimum value of the mechanical properties of the alloy at room temperature:

Established in 2006, Xi'an Machinery & Engineering Import & Export Co.,Ltd.（XMEC) is the successor to Shaanxi Marine and Engineering Import & Export Co., Ltd., which is specialized in importing & exporting mechanical and electrical products, complete equipment, various kinds of vessels and ships, marine equipment and port machinery, electronic and electric products, instruments and meters, minerals and metals, light industrial products, etc. XMEC also engages in different trading activities such as import and export of techniques and overseas project contracting.

With over 20 years of importing and exporting experience, we have good reputation from our customers at home and abroad, our source passed ISO9001:2008 and our products got SGS,RoHS Certificates etc.

Based on almost two decades of continuous efforts and development, our company has become one of the leading domestic facility which can supply high precision steel balls with complete specifications. We mainly produce Chrome steel ball (AISI52100, 100Cr6, GCr15, GCr15SiMn, SUJ2), Stainless steel ball (201, 304, 316, 420, 420C, 440C, 430), Carbon steel ball (1015, 1010, 1045, 1085), Tungsten carbide ball etc., Especially from 7.9375 mm - 82.55 mm high precision size chrome steel balls which are our principal products and used mostly for Wind Turbine Bearing, Slewing Ring Bearing and also the Bearing. The accuracy range of the steel balls we provide is from G10- G1000.

Based on customer’s requirement, the steel balls could be produced according to China Standard GB/T 308.1, International Standard ISO 3290, America Standard ANSI/ABMA Std. 10A, Germany Standard DIN 5401, Japan Standard JIS B 1501 etc.

With features of low-noisy, high-accuracy, best-service, our products have been widely used in various industry fields, such as aerospace industry, bearing, bicycle, auto industry, medical industry, electronic field, military industry, precision instrument and so on. They are all sold to overseas market with most competitive price and high quality.
 

We are looking forward to cooperation with you at the basis of mutual benefit in the near future.

Chrome Steel Ball details as follows