405 Stainless Steel 1.4002 Stainless Steel Pipe

ASTM A268 ASME SA268 S40500 405 Stainless Steel 1.4002 is a 12% chromium steel, designed to be used in the as welded condition. Unlike other grades in the 12% chromium category, 405 is not susceptible to extensive hardening through air cooling from high temperature. Commonly used for annealing boxes, steam nozzles, quenching racks, partitions and other fabrications that cannot be annealed after welded.

Soft and ductile, 405 can be easily machined using most standard practices. Experienced machinists comment that 405 machines similarly to 4130 alloy steel. 405 can be easily spun, drawn and formed using common forming procedures.

405 Stainless Steel can be welded using shielded fusion and resistance techniques. Oxyacetylene welding is not recommended. Use 405 Cb electrodes that contain columbium rather than aluminum to control hardening. Post weld annealing will maximize ductility. Soak at 1500-1600 F(817-871 C) and then quickly increase to 1900-2050 F(1038-1121 C). Do not remain at this temperature as the result will be excessive grain growth. Do not work below 1500 F(816C). After forging, air cool and anneal.

AISI Type 405 1.4002 Stainles Steel has marginal stainless steel corrosion resistance. It is used primarily as a structural material. It is serviceable in continuous service up to 1300 F and in intermittent exposures up to 1500 F. It does not harden appreciably when air cooled from high temperature where some austenite may exist.

405 is a 12% chromium steel designed to be used in the as-welded condition. Unlike other 12% chromium steels, it is not subject to a great deal of hardening through air cooling form high temperatures.

405 Stainless Steel Specification:
ASTM A240 Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
ASTM A268 Standard Specification for Seamless and Welded Ferritic and Martensitic Stainless Steel Tubing for General Service
EN 10088-2 Stainless steels – Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
JIS G3463 Stainless Steel for Boiler and Heat Exchanger Tubes

ASME SA268 405 Stainless Steel Chemical Composition:

Al	C	Mn	P	S	Cr	Si	Ni	N	Cu
0.10-0.30	max. 0.08	max. 1.00	max. 0.040	max. 0,030	11.5 – 14.5	max 1.00	max, 0.5	–	–

ASME SA240 405 Stainless Steel Chemical Composition:

Al	C	Mn	P	S	Cr	Si	Ni	N	Cu
0.10-0.30	max. 0.08	max. 1.00	max. 0.040	max. 0.030	11.5 – 14.5	max 1.00	max 0.60	–	–

EN 10088-2 1.4002 Stainless Steel Chemical Composition:

Al	C	Mn	P	S	Cr	Si	Ni	N	Cu
0.10-0.30	max. 0.08	max. 1.00	max. 0.040	max. 0.015	12.0 – 14.0	max 1.00	max 0.60	–	–

ASTM A268 ASME SA268 405 Stainless Steel Mechanical Properties

Material Grade	Matrial Number	Tensile Strength Rm N/mm² ksi(MPa) min	Yield Strength Rp0.2% N/mm²(MPa) min	Elongation (%)	Brinell Hardness Test max	Rockwell Hardness Test max
TP405	S40500	60 (415)	30 (205)	20	207	95

EN 10088-2 1.4002 Stainless Steel Mechanical Properties

Material Grade	Matrial Number	Tensile Strength Rm N/mm² ksi(MPa) min	Yield Strength Rp0.2% N/mm²(MPa) min	Elongation (%)
TP 405	1.4002	400-600	230	17

405 Stainless Steel Application

Commonly used for annealing boxes, steam nozzles, quenching racks, partitions and other fabrications that cannot be annealed after welding.

405 Stainless Steel Machinability

Soft and ductile, 405 can be easily machined using most standard practices. Experienced machinists comment that 405 machines similarly to 4130 alloy steel.

405 Stainless Steel Forming

405 can be easily spun, drawn and formed using common forming procedures.

405 Stainless Steel Welding

405 can be welded using shielded fusion and resistance techniques. Oxyacetylene welding is not recommended. Use 405 Cb electrodes that contain columbium rather than aluminum to control hardening. Post weld annealing will maximize ductility.

405 Stainless Steel Forging

Soak at 1500-1600°F(817-871°C) and then quickly increase to 1900-2050°F(1038-1121°C). Do not remain at this temperature as the result will be excessive grain growth. Do not work below 1500°F(816 °C). After forging, air cool and anneal.

405 Stainless Steel Annealing

Soak at 1200-1400°F(649-760°C), air cool.

405 Stainless Steel Hardening

While this alloy does not respond appreciably to heat treatment, soaking at 1800-1850°F(982-1010°C) followed by oil quenching will increase mechanical properties.

405 Stainless Steel Physical Properties:

Density (lb / cu. in.)	0.279
Specific Gravity g/cm³	7.75
Specific Heat (Btu/lb/°F – [32-212°F]	0.11
Thermal Conductivity	416
Modulus of Elasticity Tension	29