1.4057 Stainless Steel
1.4057 Stainless Steel
1.4057 a high tensile strength stainless steel resistant to strong oxidizing acids. The steel has good machinability and is used for e.g. shafts, spindles, piston rods, nuts and bolts. 1.4057 is weldable.
The steel grade 1.4057 is a high tensile strength martensitic stainless steel with good machinability. The steel suits good for production of corrosion resistance details by machining, and where the steel needs to be resistive to strong oxidizing acids e.g. nitric acid. The steel is magnetic and in the quenched and tempered condition.
Some typical application areas for 1.4057:
Pump- and Valve parts
Shafting
Spindels
Piston rods
Fittings
Stirrers
Bolts
Nuts
Smelting Option
1 EAF: Electric Arc Furnace
2 EAF+LF+VD: Refined-smelting and vacuum degassing
3 EAF+ESR: Electro Slag Remelting
4 EAF+PESR: protective atmosphere Electro Slag Remelting
5 VIM+PESR: Vacuum induction melting
Forming Option
1 Hot rolling process
2 Hot Forging: Electro-hydraulic; High-speed-hydraulic; Oil-hydraulic; Precision-forging
Heat-treatment Option
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
5 +AT: Solution annealed
6 +P: Precipitation hardened
Suface Option
1 Black Surface
2 Grounded: Bright but rough ; Not precision
3 Machining for plate: Bright and precision; Little turning scar
4 Peeled/Turned: Bright and precision; Little turning scar
5 Polished: Very Bright and precision size; Not turning scar
Other Services
1 Cutting: Small pieces
2 CNC Machine: Produce as your drawing
3 Package: Bare/Nylon/Canvas/Wooden
4 Payment:T/T, L/C, O/A(request credit)
5 Transport:FOB/CFR/CIF/DDU/DDP (train/ship/Air)
Weldable steel and easy to machine
1.4057 is possible to weld and shall be welded with welding consumables similar to that of the parent one. The steel is generally easier to machine than ”conventional” austenitic steels. The heat treatment condition of 1.4057 is QT 800 and it should be hot formed in the temperature range 1100-800°C. Slow cooling after hot forming.
What is 1.4057 Stainless Steel?
Chromium is the primary alloying element of martensitic steels such as 1.4057 stainless steel, imparting moderate corrosion resistance to a material with inherently high hardness and strength. In the unquenched and un-tempered condition, martensitic grades are brittle and unsuitable for engineering applications. Typically, nickel concentrations of 2 – 2.5% are added as a stabilizing element to ensure a martensitic steel retains its toughness properties through heat treatment, enabling the fabrication of numerous component types. Medical tools and mechanical components are among the most common devices constructed from martensitic steels.
ASTM 431, or 1.4057 stainless steel, is the comprehensive martensite grade for engineering applications. The exact composition varies, but an exemplary 1.4057 stainless steel will comprise: 15 – 17% chromium; 2 – 2.5% Nickel; 0.12 – 0.22% Carbon. It may also comprise small volumes of molybdenum, silicon, and phosphorous.
Mechanical Properties of 1.4057 Stainless Steel
1.4057 stainless steel boasts an exceptional blend of wear- and corrosion-resistance, impact toughness, and high strength. The exact ultimate tensile strength (UTS) values of the material vary, but you can typically expect billets of 1.4057 stainless steel to display a UTS upwards of 800MPa. This property can be finely-tuned through specific heat treatment to acquire a unique balance of mechanical to chemical characteristics. 1.4057 stainless steel is broadly resistant to oxidizing acids and corrosion from salt water, suiting it for complex engineering projects in marine applications.
Applications of 1.4057 Stainless Steel
The chemical-mechanical resistance and high-strength properties of 1.4057 stainless steel make it suitable for a broad range of engineering applications. It is routinely used in shipbuilding and construction and is widely used to fabricate drive and propeller shafts, bearings, pump and valve parts, piston rods, fittings, nuts and bolts, and many more.
1.4057 Stainless Steel from fushun
Fushun is a global steel supplier operating through a reliable network of manufacturers in Europe and around the world. We recently acquired stocks of 1.4057 stainless steel, which is suitable for machining and welding in an extensive range of engineering and construction sectors.
| Delivery condition | Mechanical properties | Temperature | ||||||
| 100℃ | 150℃ | 200℃ | 250℃ | 300℃ | 350℃ | 400℃ | ||
| +QT800 | The yield point, Re (MPa) | >515 | >495 | >475 | >460 | >440 | >405 | >355 |
| +QT900 | The yield point, Re (MPa) | >565 | >525 | >505 | >490 | >470 | >430 | >375 |
Heat and plastic processes of the grades:
Heat and plastic treatment of 1.4057, X17CrNi16-2
Rolling and forging at 1100 °C with slow cooling
Delivery condition + A
Annealing at 680 °C with cooling in the air
Delivery condition +QT800
Hardening at 950 – 1050 ℃ with cooling in water or oil
Tempering at 750 – 800℃ with repeated tempering at a temperature of 650 – 700℃
One-time tempering at a temperature of 620 – 720 ℃ in the case when the concentration of Nickel in the chemical composition is in the low range
Delivery condition +QT900
Hardening at 950 – 1050 ℃ with cooling in water or oil
Tempering at a tempering of 600 – 650℃
Heat and plastic treatment of H17N2A / H17N2
Rolling and forging at 1150 -900 °C for H17N2A, for H17N2 at a temperature of 1050 – 900℃
Softening annealing
Annealing at 620 °C with cooling in the furnace for H660N17 and H2N17A
Heat treatment
Hardening at 950 – 975℃ for H17N2A, 975 – 1040℃ for H17N2 with cooling in oil
Tempering at 275 – 300℃ for H17N2A, for H2N17 in 275 – 350℃ in air
Heat and plastic treatment of 2H17N2
Rolling and forging at a temperature of 1150 – 900 ℃
Softening annealing
Annealing at 620 – 660℃ with cooling in the furnace
Heat treatment
Hardening at 1070 – 1100℃ with cooling in oil
Tempering at 650-740 ℃ with cooling in the air
1.4057 QT800 Stainless Steel
The exact composition varies for martensitic stainless steel grades. But typically 1.4057 stainless steel will contain: 15 – 17% chromium; 2 – 2.5% Nickel; 0.12 – 0.22% Carbon. It may also have small amounts of silicon, molybdenum, and phosphorous. Brearley’s initial samples of stainless steel were martensitic. These alloys are magnetic and are usually formed in the annealed condition, and heat treated afterwards.
Chromium is the main alloying element of martensitic 1.4057 stainless steel, carrying moderate corrosion resistance to a material with inherently high strength and hardness. Normally, nickel concentrations of 2 – 2.5% are added as a stabilizing element to make sure that a martensitic steel keeps its toughness properties during heat treatment, which allows the fabrication of a number of component types.
Martensitic stainless steels are often forgotten, maybe because compared to austenitic and ferritic grades, they are not in high demand. Though, they often play a huge and often unseen role in modern infrastructure. The strength which is gained by heat treatment depends on the carbon content of the alloy. Increasing the carbon content increases the potential hardness and strength but decreases toughness and ductility.
The higher carbon grades are capable of being heat treated to a hardness up to 60 HRC. In the heat-treated, hardened and tempered condition optimum corrosion resistance is achieved. Other martensitic grades have been created with nickel and nitrogen additions but possessing lower carbon levels than the traditional grades. These steels have improved weldability, toughness, and corrosion resistance.
Benefits of Using 1.4057 Stainless Steel
Easy to machine into complex parts
Suitable for applications that are hygiene-critical
Good resistance to seawater and water of varying salt concentrations
1.4057 is one of the most rounded stainless steel grades on the market and is an outstanding engineering material for demanding applications. It is a martensitic chromium alloy and has versatile thermodynamic properties and exceptional corrosion resistance.
1.4057 stainless steel is a widely-used engineering alloy for marine applications and is inherently resistant to salt water and scaling at continuous operating temperatures of 870 oC.
The tensile properties and high toughness of 1.4057 stainless steel are maintained in the quenched and tempered condition which makes it ideal for bolt and shaft applications.
Similar to other common stainless steel grades, it is resistant to chemical attack from a range of organic matter, corrosive elements and biological matter. Therefore 1.4057 stainless steel is uniquely suited for medical and food contact devices as well as for complex machinery in shipbuilding applications.
Mechanical Properties of 1.4057
| . | . |
| Description | 1.4057 Stainless Steel |
| Tensile Strength (MPa) | <1000 |
| Yield Strength (MPa) | 1080 |
| Elongation (% in 50mm) | 20 |
| Hardness (HB) | <388 |
| Impact Charpy V (J) | 50 – 84 |
Chemical Composition of 1.4057
| . | . |
| UNS No | S43100 |
| AISI | 431 |
| Carbon (C) | 0.12 – 0.22% |
| Chromium (Cr) | 5 – 17% |
| Manganese (Mn) | <1.0% |
| Nickel (Ni) | 2.50% |
| Phosphorous (P) | <0.04% |
| Silicon (Si) | <1.0% |
1.4057 is a very common used martensitic stainless steel grade. This grade is written as 1.4057 or X17CrNi16-2 according to EN norm and it is written as UNS S43100 according to UNS norm. This grade is similar to 420, 630 and 1.4418 grades in some properties. 431 material is usually produced in quenched and tempered condition. In warehouse, we keep both QT800 and QT900 heat threated conditions in our stocks. QT means Quenched and tempered and the number 800 or 900 shows the minimum ultimate tensile strength of the material. So if 1.4057 material is QT800 heat threated, then this means this material has a minimum tensile strength of 800 MPA. This grade has a really good mechanical properties and the price of this grade is not to high. Because of these advantages, the use of 1.4057 stainless steel is really wide. 1.4057 stainless steel material used in shaft parts, pump parts, molding parts, chemical industries. because of its preheat threated condition, this grade can be used with out heat threatment in many applications. Heat treatment is necessary only if the material should be harder or stronger.
EN 1.4057 stainless steel is a martensitic stainless steel formulated for primary forming into wrought products. 1.4057 is the EN numeric designation for this material. X17CrNi16-2 is the EN chemical designation.
The properties of EN 1.4057 stainless steel include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.4057 stainless steel to: wrought martensitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it’s 50% of the highest, and so on.
Grade 1.4057 is a martensitic stainless steel. 1.4057 is mainly being delivered in quenched and tempered condition. In quenched and tempered condition its tensile strength at room temperature is between 800 and 950 N/mm², its yield strength is at at least 600 N/mm². It can frequently be found in the pump as well as in the engineering industry.
