O125 is a high material grade of grey cast iron in Sweden standard SS 14 01, it is equivalent to GG25 in Germany standard DIN 1691.

This material offers good strength and abrasion resistance, but it is still easy to machine and can be finished to a high standard. It is a lamellar cast iron with a predominantly pearlitic structure. O125 is not recommended for hardening applications and heat treatment.

Equivalent Grades for SS 14 01 O125 gray cast iron:

Besides GG25 in standard DIN 1691, this grade is also equivalent to the following grades:
ISO 185 - GRADE 250
GB 9439 - HT250 in China
ASTM A48 - Class 35 in USA
EN 1561 - EN-GJL-250 in European
JIS G5501 - FC250 in Japan
NF A32-101 - FGL250 in France
BS 1452 - 250 in UK
UNI 5007 - G25 in Italy
UNF - FG25 in Spain
NBN 830-01 - FGG25 in Belgium
AS 1830 - T250 in Australia
NS11 100 - SJG250 in Norway

We summarize the following chemical composition and mechanical properties for O125 in SS 14 01 according to GG 25 in DIN 1691.

O125 (Sweden: SS 14 01) Chemical Composition:

The normal chemical composition should be C = 2.8-3.3, Si = 1.2-1.7, Mn = 0.8-1.2, P ≤ 0.15, S ≤ 0.12.
In all standards, the chemical composition is just for reference. The grey iron foundries could adjust their composition according to their own production condition and experience, as long as they could guarantee to meet the mechanical properties, which is the only inspection standard.

O125 (Sweden: SS 14 01) Mechanical Properties:
Compressive Strength, 950 MPa
Tensile Strength, 250~350 Mpa
Brinell Hardness HB30, 180-240
Modulus of Elasticity, 110 kN/mm2
Elongation, 0.3~0.8%

Only the tensile strength is the quality inspection standard. Other mechanical properties are only for reference unless the buyers have particular requirements.

SS 140 01 O125 Gray Cast Iron Castings

Gray cast iron block bearing

Gray cast iron flywheel casting

Gray cast iron pulley casting

This article is from our Dandong Foundry's SS 14 01 O125 gray cast iron

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