AISI 403, AISI 410, UNS S40300, UNS S41000

GE B50A947, B7B20A, SIEMENS 10705BC, 10705AT, 10725AH, 10725BA, 916208, APP-MV11-Z0-020, 090-297

What is AISI 403 grade steel?

403, 410 stainless steels are general-purpose martensitic stainless steels containing 11.5% chromium, which provide good corrosion resistance properties. However, the corrosion resistance of grade 410 steels can be further enhanced by a series of processes such as hardening, tempering and polishing. quenching and tempering can harden grade 410 steels. 403 martensitic stainless steels are fabricated using techniques that require final heat treatment. These grades are less resistant to corrosion when compared to that of austenitic grades. Their operating temperatures are often affected by their loss of strength at high temperatures, due to over-tempering and loss of ductility at sub-zero temperatures. They are generally used for applications involving mild corrosion, heat resistance and high strength, corrosion resistant chromium martensitic stainless steel used for the production of steam turbine blades, bolts, hydraulic press valves, cracking apparatus, water pump parts, nuts, stainless steel sieves for coal screening and other components working in contact with water and steam

See more materials in Steels of Blade for Steam and Gas Turbine, including 1.4906, XM-25, AISI 422 and B50A365.

Chemical Composition

Grade	Chemical Composition WT %
Grade	C	Mn	Si	P	S	Cr	Mo	Ni
GE B50A947 A1, A2, A3, A5	0.09-0.15	0.25-0.80	Max 0.5	Max 0.03	Max 0.030	12.25-13.0	Max 0.3	Max 0.60
GE B50A947 A4	0.09-0.15	0.25-0.80	Max 0.5	Max 0.025	Max 0.010	12.25-13.0	Max 0.3	Max 0.60
GE B50A947 B1, B2, B3	0.12-0.15	0.25-0.65	Max 0.5	Max 0.025	Max 0.010	11.50-12.50	Max 0.3	Max 0.75
SIEMENS 10705BC	0.08-0.15	Max 1.5	Max 1.0	Max 0.04	Max 0.030	11.5-13.5		Max 0.75
X12CrS13, 1.4005	0.06-0.15	Max 1.5	Max 1.0	Max 0.04	0.15-0.35	12.0-14.0	Max 0.6
X15Cr13, 1.4024	0.12-0.17	Max 1.0	Max 1.0	Max 0.04	Max 0.030	12.0-14.0
BS 410S21, 410S21	0.09-0.15	Max 1.0	Max 1.0	Max 0.04	Max 0.030	11.5-13.5		Max 1.00
UNS S41000, AISI 410, Grade 410	Max 0.15	Max 1.0	Max 1.0	Max 0.04	Max 0.030	11.5-13.5

Mechanical Properties

403 Mechanical properties acc. to GE B50A947

A1, A2

After extrusion to compressor blades the requirements shall meet the requirements of P3C-AG60
A 1, Brinell Hardness, 3000Kg Load: 241 Max
A 2, Brinell Hardness, 3000Kg Load: 241 - 302

A3, A4

Tensile strength ksi(MPa) %, min: 110(760)
Yield Strength 0.02% Offset ksi(MPa) min: 80(555)
Elong In 2 inches %, min: 18
RA %, min: 50
Brinell Hardness, 3000Kg load: 223-269
V-Notch Charpy min. Energy at R.T. ft-lbs(J) 40(54.2)

Tensile strength ksi(MPa) %, min: 100
Yield Strength 0.02% Offset ksi(MPa) min: 70
Elong In 2 inches %, min: 15
RA %, min: 40
Brinell Hardness, 3000Kg load: 207-241
V-Notch Charpy min. Energy at R.T. ft-lbs(J) -

B1, B2

Tensile strength ksi(MPa) %, min: 110(760)(
Yield Strength 0.02% Offset ksi(MPa) min: 80(555)
Elong In 2 inches %, min: 18
RA %, min: 55
Brinell Hardness, 3000Kg load: 223-269
V-Notch Charpy min. Energy at R.T. ft-lbs(J) 25(33.9)

Tensile strength ksi(MPa) %, min: 120(830)
Yield Strength 0.02% Offset ksi(MPa) min: 90(620)
Elong In 2 inches %, min: 18
RA %, min: 55
Brinell Hardness, 3000Kg load: 248-285
V-Notch Charpy min. Energy at R.T. ft-lbs(J) 25(33.9)

403 Mechanical properties acc. to EN 10088-1

Tensile strength R_m = 650 - 850 MPa
Yield point R_e: >450 MPa
Elongation A > 15%
Modulus of elasticity E = 215 GPa
Thermal conductivity coefficient λ = 30 W ⋅ m^-1 ⋅ K^-1
Thermal capacity c_p = 460 J ⋅ kg^-1 ⋅ K^-1
Hardness in softened state 121 - 187 HB

Physical Properties

Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100 °C (J/kg.K)	Electrical Resistivity (nΩ.m)
Elastic Modulus (GPa)	0-100 °C	0-315 °C	0-538 °C	at 100 °C	at 500 °C	Specific Heat 0-100 °C (J/kg.K)	Electrical Resistivity (nΩ.m)
410	7800	200	9.9	11	11.5	24.9	28.7	460	570

Heat Treatment

403 steels have good scaling resistance at temperatures of up to 650 °C. However, the mechanical properties of the material will tend to reduce at temperatures ranging from 400 to 580 °C.

403 steels can be fully annealed at temperatures from 815 to 900 °C, followed by slow furnace cooling and air-cooling. Process annealing of grade 410 steels can be carried out at temperatures ranging from 650 to 760 °C and air-cooled. Hardening – Hardening of grade 410 steels can be performed at 925 to 1010 °C, followed by air and oil quenching. Heavy sections of grade 410 need to be oil quenched. Tempering, to enhance the mechanical properties and hardness of grade 410 steels, follows this process. It is not recommended to perform tempering at temperatures from 400 to 580 °C.

Welding

403 steels can be welded using all conventional welding techniques, but the materials should pre-heated at 150 to 260 °C followed by post-weld annealing treatment, to mitigate cracking. 403 welding rods are recommended for tempering and post-hardening. In the "as welded" conditions, grade 309 filler rods can be used to achieve a ductile joint. According to AS 1554.6 standards, grade 309 electrodes or rods are preferred for welding 403 steels.

Machining

403 steels can be easily machined in highly tempered or annealed conditions. However, it is hard to machine grade 410 steels if they are hardened above 30HRC. Free machining grade 416 is the best titleernative.

What is AISI 403 equivalent to?

AISI 403, AISI 410, UNS S40300, UNS S41000, 1.4006, 1.4011, X12Cr13, X12Cr12, SUS410

Frequently Asked Questions about AISI 403

Common questions about AISI 403 steel grade, properties, equivalents, and ordering from Longhai Steel.

What is AISI 403 grade steel?

AISI 403 is a special steel grade supplied by Longhai Steel: AISI 410, 403 - Construction martensitic stainless chromium steel suitable for the production of Gas turbines, Bolts, screws, bushings and nuts, Petroleum fractionating structures, Shafts, pumps and valves

What is the chemical composition of AISI 403?

The chemical composition of AISI 403 is listed on this datasheet page and in the downloadable PDF.

What is AISI 403 equivalent to?

Equivalent and similar grades for AISI 403 are listed in the Similar or equivalents steel grade section on this page.

How can I get a quote for AISI 403?

Email sales@longhaisteel.com with size, quantity, and delivery requirements.