403Cb+ ESR Stainless, Alloy Steel for Fasteners. 403Cb+ steel is EN 10269 heat-resistant steel and is used for fasteners.
- Applications & Details
- Chemical Composition
- Mechanical Properties
- Physical Properties
- Stocks
- Heat Treatment
- Thermal Properties
- Welding
- Machining
- Similar or equivalents steel grade
What is 403Cb+ grade steel?
403Cb+ ESR Stainless, Alloy Steel for Fasteners. 1.4913 steel is EN 10269 heat-resistant steel and is used for fasteners. 403Cb+ martensitic stainless steel is characterized by high-temperature strength and creep resistance. although the alloy content of chromium and molybdenum, which are elements for high temperatures, is small, vanadium, which is an element for tool steel, Nitrogen, which increases strength as an interstitial element, increases high-temperature strength and creep.
Niobium alloy is used for bolts and nuts for power plants, parts for aircraft, steam valves, Use temperature up to 580℃ for turbine blades and shafts, oil production equipment. EN material number 1.4913, material name X19CrMoMbV11-1, DIN 1.4914, Comparable to SUH600, Alloy Grade H46, 403Cb Plus, B50A365 materials.
It is a material used for QT heat treatment and has a minimum yield strength of 750 MPa during QT heat treatment.
In Soft Annealed condition, HBW 302 maximum.
By removing impurities and non-metallic inclusions inside the steel, the toughness and internal
Electro Slag Remelt (ESR) is sometimes used to improve quality.
Inclusions
Non metallic particles like oxides, sulfides, and silicates in the steel matrix. To decrease the negative effect of inclusions on mechanical properties,
special cleaning methods are used during the melting process in steel production.
It refers to very small particles such as oxides, sulfides, and silicates in the metal structure.
They are used in the manufacturing process of steel to reduce the negative effect on mechanical properties.
remove it.
Niobium (Nb) or Columbium (Cb)
When niobium is alloyed with steel, it contributes to the improvement of strength by refining the crystal grains.
It serves to improve high-temperature strength and creep performance.
Vanadium (V) – increases shock resistance, strength, and hardness.
Retards grain growth even after exposure to high temperatures.
Elemental vanadium increases hardness, strength and impact resistance, An element that retards grain growth at high temperatures.
In addition, it increases wear resistance and elasticity limit, refines the structure, and has a specific gravity of 6.16 g/cm
In the case of plate, the yield strength is 450 MPa, and when cold rolled (84%), it is 770MPa. Ni, Cr, Mo elements and they are often alloyed together.
Chemical Composition
| Grade | Chemical composition WT % | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Ni | Nb | V | N | Pb | Sn | Ti | Al | W | Co | |
| 403Cb+, B50A365 A | 0.15-0.20 | 0.20-0.60 | 0.50-0.80 | 0.025 | 0.025 | 10.0-11.0 | 0.30-0.60 | 0.35-0.55 | 0.15-0.25 | 0.04-0.08 | 0.005 | 0.04 | 0.05 | 0.05 | 0.25 | 0.25 |
| 403Cb+, B50A365 B | 0.15-0.20 | 0.20-0.60 | 0.50-0.80 | 0.020 | 0.010 | 10.0-11.0 | 0.30-0.60 | 0.35-0.55 | 0.15-0.25 | 0.04-0.08 | 0.005 | 0.04 | 0.05 | 0.05 | 0.25 | 0.25 |
| 403Cb+, B50A365 A1 | 0.15-0.20 | 0.20-0.60 | 0.50-0.80 | 0.025 | 0.025 | 10.0-11.0 | 0.30-0.60 | 0.35-0.55 | 0.15-0.25 | 0.04-0.08 | 0.005 | 0.04 | 0.05 | 0.05 | 0.25 | 0.25 |
Mechanical Properties
Mechanical properties acc. to B50A365 Class A, B, C
- Tensile Strength, ksi (MPa), min 140 (965)
- Yield Stress 0.02% Offset, ksi (MPa), min 100 (690)
- Elongation in 4D %, min 15
- Reduction of Area, %, min 45
- Hardness, Brinell 3000 Kg load 321 max.
- Impact, Charpy V-Notch, Ft.-Lbs. (J), min 8 (11)
Heat Treatment
(1095-1135°C) and held at temperature for sufficient time to assure uniform temperature within the load and each part thereof. The material shall then be quenched in oil or rapidly moving air, as approved in the manufacturing process plan，to a temperature below the Mf martensite finish temperature, to assure complete transformation. Material made to Classes A and C and material that is made to Class B without straightening or cold finishing shall then be uniformly heated to a minimum tempering temperature of 1185°F (640°C), and held for the time necessary to achieve all of the required properties.
What is 403Cb+ equivalent to?
403Cb+, 1.4913, 1.4913, X19CrMoMbV11-1, 1.4914, SUH600, Alloy Grade H46, 403Cb Plus, B50A365