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Comparison of Stainless Steel Standards in Different Countries

Since stainless steel was invented by British scientist Henry Brelley in 1916, there has been considerable development. Various types of stainless steel were invented. Each major industrial country has its own set of stainless steel standards. This article will record in detail the comparison of different standards in various countries. I hope that through the reading of this article, I can provide you with information when purchasing stainless steel.

Number and Representation of Steel

①Use international chemical element symbols and national symbols to represent chemical components, and Arabic letters to represent component content:

Such as China, Russia 12CrNi3A

 

②Use fixed-digit numbers to indicate steel series or numbers; such as the United States, Japan, 300 series, 400 series, 200 series;

 

③The serial number is composed of Latin letters and sequences, which only indicates the purpose.

J3 Stainless Steel : A Complete Guide For Importers

China’s Numbering Rules

①Using element symbols

②Purpose, Chinese pinyin, open-hearth steel: P, boiling steel: F, killed steel: B, Class A steel: A, T8: special 8, GCr15: ball

◆Composite steel, spring steel, such as 20CrMnTi 60SiMn (use a few ten thousandths to express the content of C)

◆Stainless steel, alloy tool steel (using a few thousandths to express C content), such as 1Cr18Ni9 one-thousandth (ie 0.1% C), stainless C≤0.08% such as 0Cr18Ni9, ultra-low carbon C≤0.03% such as 0Cr17Ni13Mo

Stainless Steel Chemical Composition – YAOYI Stainless Steel

AISI 304; AISI  301; AISI 316;AISI 316L…

International Stainless Steel Standards Marking Method

The American Iron and Steel Institute uses three digits to indicate various standard grades of forgeable stainless steel. among them:

①Austenitic stainless steel is marked with 200 and 300 series numbers

②Ferritic and martensitic stainless steels are represented by numbers in the 400 series. For example, some of the more common austenitic stainless steels are marked with 201, 304, 316 and 310

③Ferritic stainless steel is marked with 430 and 446, martensitic stainless steel is marked with 410, 420, and 440C, duplex (austenite-ferrite)

④Stainless steel, precipitation hardening stainless steel, and high alloys with iron content less than 50% are usually named by patent names or trademarks.

J2 Stainless Steel: A Complete & Thorough Guide

Stainless Steel Grade Group

200 series-chromium-nickel-manganese austenitic stainless steel

300 series—chromium-nickel austenitic stainless steel

Model 301—good ductility, used for molded products. It can also be hardened by mechanical processing. Good weldability. Abrasion resistance and fatigue strength are better than 304 stainless steel.

Model 302—The corrosion resistance is the same as that of 304 because the carbon content is relatively high, the strength is better.

Model 303—It is easier to cut than 304 by adding a small amount of sulfur and phosphorus.

Model 304—general model; that is, 18/8 stainless steel. The GB grade is 0Cr18Ni9.

Model 309—Compared with 304, it has better temperature resistance.

Model 316-after 304, the second most widely used steel grade, mainly used in the food industry and surgical equipment, adding molybdenum to obtain a special corrosion-resistant structure. Because it has better resistance to chloride corrosion than 304, it is also used as “ship steel”. SS316 is usually used in nuclear fuel recovery devices. 18/10 grade stainless steel usually also meets this application level.

Model 321—Except for the addition of titanium to reduce the risk of corrosion of the material welds, other properties are similar to 304. Stainless steel decorative pipe, 201 stainless steel pipe, 304 stainless steel pipe

400 series-ferritic and martensitic stainless steel

Model 408—Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.

Model 409—the cheapest model (British and American), usually used as a car exhaust pipe, is a ferritic stainless steel (chrome steel).

Model 410—Martensite (high-strength chromium steel), with good wear resistance and poor corrosion resistance.

Model 416—Add sulfur to improve the processing performance of the material.

Model 420—”cutting tool grade” martensitic steel, similar to the earliest stainless steel such as Brinell high chromium steel. It is also used for surgical knives, which can be very bright. Model 430—Ferritic stainless steel, for decoration, such as car accessories. Good formability, but poor temperature resistance and corrosion resistance.

Model 440—High-strength cutting tool steel with slightly higher carbon content. After proper heat treatment, higher yield strength can be obtained. The hardness can reach 58HRC, which is among the hardest stainless steel. The most common application example is the “razor blade”. There are three commonly used models: 440A, 440B, 440C, and 440F (easy processing type).

500 series-heat-resistant chromium alloy steel.

600 series—Martensitic precipitation hardening stainless steel.

Model 630—The most commonly used precipitation hardening stainless steel model, usually also called 17-4; 17% Cr, 4% Ni.

How To Find The Right Stainless Steel Supplier – YAOYI Stainless Steel

Comparison Table of National Stainless Steel Group Standards

Standard

Name

GB

National Standards of the People’s Republic of China

KS

Korean Standard

AISI

America Iron and Steel Institute

SAE

Society of Automative Engineers

ASTM

American Society for Testing and Material

AWS

American Welding Society

ASME

American Society of Mechanical Engineers

BS

British Standard

DIN

Deutsch Industria Normen

CAS

Canadian Standard Associatoin

API

American Petroleum Association

KR

Korean Resister of Shipping

NK

Hihon Kanji KOKI

LR

Llouds Register of Shipping

AB

American Bureau of Shipping

JIS

Japanese Standard

 

China

USA

Germany

UK

France

Italy

Spain

Japan

GB

AISI/SAE

W.-nr.

DIN

BS

EN

AFNOR

UNI

UNE

JIS

12Cr17Ni7

301

1.431

X12CrNi177

Z17CN17.07

X12CrNi1707

F.3517

SUS 301

06Cr18Ni9

304

1.435

X5CrNi189

304S11

58E

Z6CN18.09

X5CrNi1810

F.3504

SUS 304

022Cr19Ni10

304L

1.4306

X2CrNi1911

304S11

Z2CN18.10

X2CrNi1811

SUS 304L

1Cr18Ni9MoZr

303

1.4305

X2CrNi188

304S21

58M

Z10CN18.09

X10CrNi1809

F.3508

SUS 303

304L

1.4306

X2CrNi189

304S12

Z2CN1810

X2CrNi18.11

F.3503

SCS19

06Cr17Ni11Mo2

316

1.4401

X5CrNiMo1810

316S16

58J

Z6CND17.11

X5CrNiMo1712

F.3543

SUS 316

06Cr27Ni12Mo3

316L

1.4435

X2CrNiMo1812

316S13

Z2CND17.12

X2CrNiMo1712

SUS 316L

06Cr18Ni11Ti

321

1.4541

X10CrNiTi189

321S12

58B

Z6CND18.10

X6CrNiTi1811

F.3523 F.3523

SUS 321

06Cr18Ni11Nb

347

1.455

X10CrNiMo189

347S17

58F

Z6CND1811

X6CrNiNb1811

F.3552 F.3524

SUS 347

Cr18Ni12Mo2T

316Ti

1.4571

X10CrNiMoTi1810

320S17

Z6CND17.12

X6CrNiMoTi1712

F.3535

Cr17Ni12Mo3Mb

318

1.4583

X10CrNiMoNb1812

Z6CND1713B

X6CrNiMoNb1713

1Cr23Ni13

309

1.4828

X15CrNisI2012

309S24

Z15CNS2012

X6CrNi2520

SUH 309

12Cr17Mn6Ni5N

201

1.4372

SUS 201

12Cr18Mn9Ni5N

202

1.4373

SUS 202

 

Is 301 Stainless Steel Magnetic?

Reference

http://en.wikipedia.org/wiki/Stainless_steel

https://en.wikipedia.org/wiki/SAE_steel_grades

https://www.thespruce.com/stainless-steel-cookware-care-4071580