S99

UK B.S. BS 5S 99 : 1994 S99 2.5 % nickel-chromiummolybdenum (high carbon) steel billets, bars, forgings and parts (1230-1420 MPa: limiting ruling section 150 mm) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel S99 Martensite B.S. UK 2.5 % nickel-chromiummolybdenum (high carbon) steel billets, bars, forgings and parts (1230-1420 MPa: limiting ruling section 150 mm)
Datasheet for:Steel Grades:Specialsteel:S99

Chemical composition(mass fraction)(wt.%) of the S99

Elements Min.(≥) Max.(≤)
C 0.36 0.44
Si 0.10 0.35
Mn 0.45 0.70
P - 0.025
S - 0.015
Cr 0.5 0.8
Mo 0.45 0.65
Ni 2.3 2.8
Al 0.015 0.050
Fe - Base

Mechanical properties / Mechanische Eigenschaften / Caracteristiques mecaniques of grade S99

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
324 (≥) 588 (≥) 31 11 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 421
Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
44 - -     0.34 -  
885 113 - 11.3 223   -  
773 - 23 23.2   131 233
Heat treated : 1483°C - 1991°C
The material does not have direct Metallography properties.
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
Y1Cr18Ni9 GB China
Improve the machinability, ablation resistance. Suitable for automatic lathe production of bolt and nut
1Cr18Ni9 GB China
High strength after cold forming, but elongation than 1 cr17ni7 slightly worse. Used in architectural decoration parts
1Cr18Mn10Ni5Mo3N GB China
Of urea with good corrosion resistance, can produce urea corrosion of the equipment.
1Cr17Ni7 GB China
High strength after cold forming. Used in railway vehicle, conveyor belt, bolt and nut, etc
Y1Cr18Ni9Se GB China
Improve the machinability, ablation resistance. Suitable for automatic lathe production of rivets, screws
0Cr18Ni9 GB China
Seamless stainless steel tubes for boiler and heat exchanger
00Cr19Ni10 GB China
Carbon content lower than 0Cr19ni9 steel, excellent intergranular corrosion resistance, is used for welding after the class is not processed parts
1Cr17Mn6Ni5N GB China
Nickel steel grade, instead of number 1 cr17ni7 and magnetism after cold working, used in railway vehicle, etc
1Cr18Mn8Ni5N GB China
Nickel steel, instead of 1cr18ni9
0Cr19Ni9N GB China
Based on 0cr19ni9 plus N, strength increase and the plastic is not down. Reduce the thickness of the material. As a structure with strength components
0Cr19Ni10NbN GB China
Based on zero cr19ni9 plus N and Nb, with better than 0 cr19ni9 properties and USES
00Cr18Ni10N GB China
In 00cr19ni10 adding N, on the basis of the above grades also features, use the same as the 0 cr19ni9n, but better intergranular corrosion resistance
1Cr18Ni12 GB China
Compared with 0 cr19ni9, processing low hardenability. Used for spinning processing, special drawing, cold heading
0Cr23Ni13 GB China
Corrosion resistance and heat resistance are better than 0cr19ni9
0Cr25Ni20 GB China
Oxidation resistance is better than 0cr23ni13. Mostly used as heat resistant steel
0Cr17Ni12Mo2 GB China
Seamless stainless steel tubes for boiler and heat exchanger
1Cr18Ni12Mo2Ti GB China
Seamless stainless steel tubes for boiler and heat exchanger
0Cr18Ni12Mo2Ti GB China
Seamless stainless steel tubes for boiler and heat exchanger
A-29 1025 SAE USA
General use carbon steel rod
1025 SAE USA
These products have been used typically for use in fabrication of fittings, but usage is not limited to such applications. These products are not typically used for deep forming or cupping operations.
Relevant standard
Standard No. Description Download
BS 5S 99 : 1994 2.5 % nickel-chromiummolybdenum (high carbon) steel billets, bars, forgings and parts (1230-1420 MPa: limiting ruling section 150 mm)
Contact Suppliers with your enquiries for S99 any of the shape and size.

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BS 5S 99 : 1994, S99 can be supplied as steel plate/ sheet, round steel bar, steel tube/pipe, steel stripe, steel billet, steel ingot, steel wire rods. electroslag, forged ring/ block,etc.
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