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  DIN 1691 GG20 Gray Cast Iron  
 

The followings are the characters, application, chemical composition and equal grades of DIN 1691 GG20.

Characteristics of DIN 1691 GG20 Gray Cast Iron:
DIN 1691 GG20 Gray Cast Iron offers exceptional machinability and is extremely resistant to heat and corrosion. This material is also easy to finish and extremely effective at damping both sound and vibration. The strength and abrasion resistance of this material are limited.

Common Application for DIN 1691 GG20 Gray Cast Iron:
Requirements withstand greater load and a certain degree of tightness or corrosion resistance of the more important castings such as cylinder, gear, base, flywheels, bed, cylinder block, cylinder liner, piston, gear box, brake wheel, coupling plate, medium pressure value, etc.

Standards / Designations

Country

Standard

Material Grade


ISO

ISO 185

GRADE 200


China

GB 9439

HT200


USA

ASTM A48

CLASS 30


Germany / Austria

DIN 1691

GG20


European

EN 1561

EN-GJL-200


Japan

JIS G5501

FC200


Italy

UNI 5007

G20


France

NF A32-101

FGL200


UK

BS 1452

180, 200, 220


Spain

UNF

FG20


Belgium

NBN 830-01

FGG20


Australia

AS 1830

T200, T220


Sweden

SS 14 01

O120


Norway

NS11 100

SJG200

Chemical Composition of DIN 1691 GG20 Gray Cast Iron:

Carbon

C

3.20-3.40

[%]


Silicon

Si

2.10-2.30

[%]


Manganese

Mn

0.5-0.8

[%]


Sulphur

S

0.12 max.

[%]


Phosphorus

P

0.40 max.

[%]


Iron

Fe

Balance

As for normal grey iron, the chemical composition is not important comparatively. The iron foundries could adjust the compositions according to their experience as long as they could meet the physical and mechanical requirements.

Mechanical Properties of DIN 1691 GG20 Gray Cast Iron:

Tensile strength

σ B

200

[N/mm2]


Elongation

A

0.3-0.8

[%]


Permanent limit of elongation

σ bB

400

[N/mm2]


Compressive Strength

σ dB

800

[N/mm2]


Brinell hardness

HB30

170-210

[Kg/mm2]


Elasticity modulus

Eo

100

[kN/mm2]


Shear stress

σaB

230

[N/mm2]

 

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