Grade 409 stainless steel is a Ferritic steel that offers good mechanical properties and high-temperature corrosion resistance. It is commonly considered as a chromium stainless steel, with applications in exhaust systems of automobiles and applications that demand weldability.
Grade 409 steels are also available in highly stabilized forms, such as grades S40930, S40920 and S40910. The stability of these grades is provided by the presence of niobium, titanium, or both, in the composition of steels.
CHEMICAL COMPOSITION: (ASTM A240)
Element
|
UNS S40910
|
UNS S40920
|
UNS S40930
|
Carbon
|
0.030 max.
|
0.030 max.
|
0.030 max
|
Manganese
|
1.00 max.
|
1.00 max.
|
1.00 max.
|
Sulfur
|
0.020 max.
|
0.020 max
|
0.020 max
|
Phosphorus
|
0.040 max.
|
0.040 max.
|
0.040 max.
|
Silicon
|
1.00 max.
|
1.00 max.
|
1.00 max.
|
Chromium
|
10.5 - 11.7
|
10.5 - 11.7
|
10.5 - 11.7
|
Nickel
|
0.50 max.
|
0.50 max.
|
0.50 max.
|
Nitrogen
|
0.030 max.
|
0.030 max.
|
0.030 max.
|
Titanium
|
6x(C+N) min. - 0.50 max.
|
8X(C+N)min. / 0.15 - 0.50
|
0.05 min.
|
Niobium
|
0.17 max.
|
0.10 max.
|
|
Ti + Nb
|
|
|
[0.08+8x(C+N)] min. - 0.75 max.
|
MECHANICAL PROPERTIES:
Type
|
Yield Strength 0.2% offset (KSI)
|
Tensile Strength (KSI)
|
% Elongation (2″ Gauge length)
|
S40910
|
25 min.
|
55 min
|
20 min.
|
S40920
|
25 min.
|
55 min.
|
20 min.
|
S40930
|
25 min.
|
55 min.
|
20 min.
|
PHYSICAL PROPERTIES:
Density (lb./ in^2) @ RT
|
|
0.28
|
Modulus of Elasticity in Tension (psi x 10^6)
|
|
29
|
Specific Heat (BTU/o F/lb.)
|
32 to 212 oF
|
0.114
|
Thermal Conductivity (BTU/hr/ft^2/ft)
|
212oF
|
14.4
|
Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F)
|
32 to 212oF
|
5.84
|
|
32 to 500oF
|
6.12
|
|
32 to 900oF
|
6.60
|
|
32 to 1,200oF
|
6.86
|
Electrical Resistivity (micro ohms - cm)
|
at 70oF
|
60.0
|
Oxidation Resistance - Continuous Service(oF)
|
|
1450
|
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FAQ
1. Q: Are you a factory or trading company?
A: We are professional manufacturer for steel plate, and our company also is a very
professional a trade company for steel products.we can also provide a wide range of steel products.
2. Q: Can I get samples before order ?
A: Yes, of course. For regular size samples are free. we also can supply according to your samples or technical drawings.
3. Q:what is your delivery time ?
A: Usually, materials can be prepared within one week. For Shipping date can be arranged within 10 days after receving the deposit or accepted orginal LC.
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A: We have obtained ISO, CE and other certifications. From materials to products, we check every process to maintain good quality.
6. Q:How can you ensure what I got will be good ?
A: We accept thirty inspection before shipment. Test of PMI is aviliable for each lot of materials. If the product fails the inspection before leaving the factory, you can refuse to accept the goods.
7. Q:How do you make our business long-term and good relationship?
A:We keep good quality and competitive price to ensure our customers reasonable benefit ; We respect every customer as our friend and we sincerely do business and make friends with them. No matter where they come from.
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A: For the regular products, even 10kgs order we can work out. For special customized order, MOQ can be confirmed according to each type. Please feel free to leave us message if you have any question about us and our products.
9. Q: How do we trust your company?
A: We specialise in steel business for years, headquarter locates in Wuxi, Jiangsu province,you are welcome to investigate in any ways, by all means, you could arrange company inspection before making any order.
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