300 Series stainless steel castings
The 300 series stainless steels are the most common chrome-nickel steels because they are highly corrosion resistant and suitable for temperature extremes while maintaining strength and durability. Various alloying elements alter properties such as hardening, tensile strengths, ductility, elongation and formability that make 300 stainless steels austenitic. 300 steels are not heat hardened, so they are often used in cookware, automotive and aerospace parts. Molybdenum, copper, titanium, nickel and nitrogen are common alloying elements that alter usability service.
Shelmet
Casting Metals
300 Series Stainless Steel
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300 Series Stainless Steel Castings - Investment Casting Metals
Shelmet investment casting metals & alloys
Though austenitic stainless steels aren’t hardenable through heat, they remain ductile—beneficial for parts that endure impact stress. Steel grades, such as 303, 304L, and 316L include sulfur, manganese, or selenium that improve machining without compromising corrosion resistance.
Key Takeaways
1) 300‑series stainless resist corrosion, endure heat, and cut machining time.
2) Specify surface finish and tolerances up front—they’re achievable and cost-effective.
3) Discuss stainless steel alloy options with your Shelmet metal expert to obtain maximum benefits with your specific castings. It’s a free call.
300 Stainless Steel Casting
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What is 300 Stainless Steel?
Shelmet’s Series 300 Stainless Steel castings are poured from the most used stainless steel alloys in common service throughout society. 304 stainless castings are corrosion and chemical resistant suitable for food and beverage services and for maintaining sharp edges in cutlery. 316 Stainless is routine from detailed computer electronics to military jets. 300 series stainless steels such as 309 alloys that are are corrosion and heat resistant.
Flexible uses of 300 series stainless are found in aerospace, medical & automotive parts, and cold-worked steels requiring durable sharpness such as razors.
The austenite crystal formation make steels incapable of heat treating to hardening like the 400 series. The 300 steels have additional chromium ranging between 18% to 30% and prevalent alloying agents of chromium, nickel, and molybdenum.
Common stainless steel selections
Alloying Agents
Chromium
Nickel
Molybdenum
Non-magnetic
Not heat treating hardenable
Highly corrosion resistant
High‑Temperature Strength and Toughness
Many 300‑series grades offer both corrosion resistance and mechanical strength at elevated temperatures—309 resists oxidation up to ~1,900 °F, and 310 handles ~2,000 °F. Metal parts cast with the 300 stainless series maintain tensile strengths in the 60–70 ksi range, good for aerospace, automotive, or thermal-system components.
When selecting an alloy for high-precision cast parts, engineers frequently choose 300 series stainless steels. Alloys in the 300 series provide outstanding combinations of performance that reduces machining, provides consistent part quality, and gives you long-term reliability.
Near-Net Shape Cuts Machining Costs
A key driver as investment casting benefits is how little machining is required. 300 Stainless Steel Investment casting delivers high surface quality that directly translates to lower scrap, faster turnover, and less machining time.
Discuss these options with your Shelmet metal casting expert. A 5 minute phone call can save you money and get your parts to your door faster.
300‑series stainless steel alloys like 304, 316, 321, and 309, contain 16–30% chromium and 6–35% nickel. These specific alloy mixes form self-healing oxide films that are resistant to atmospheric, marine, chemical, and high‑temperature corrosion.
In applications from food processing to petrochemical systems, this means cast parts last longer—without coating, plating, or frequent maintenance.
| Alloy | UNS | ASTM | ASME | AISI | AMS | Mil-Spec | FED | SAE | Grade |
|---|---|---|---|---|---|---|---|---|---|
| 302 | S30200 | A167 | SA240 | 302 | 5515 | MIL-S-5059 | QQ-S-763 | J230 | |
| A240 | SA479 | 5516 | MIL-S-7720 | QQ-S-766 | J405 | ||||
| A276 | 5600 | ||||||||
| A313 | 5656 | ||||||||
| A314 | 5637 | ||||||||
| A368 | 5688 | ||||||||
| A473 | 5693 | ||||||||
| A478 | 7210 | ||||||||
| A479 | 7241 | ||||||||
| A492 | |||||||||
| A493 | |||||||||
| A511 | |||||||||
| A554 | |||||||||
| A580 | |||||||||
| A666 |
| Alloy | UNS | ASTM | ASME | AISI | AMS | Mil-Spec | FED | SAE | Grade |
|---|---|---|---|---|---|---|---|---|---|
| 303 | S30300 | A194 | SA194 | 303 | 5640 | J405 | 8F | ||
| A314 | SA320 | 8FA | |||||||
| A320 | B8F | ||||||||
| A473 | B8FA | ||||||||
| A581 | |||||||||
| A582 | |||||||||
| A895 |
| Alloy | UNS | ASTM | ASME | AISI | AMS | Mil-Spec | FED | SAE | Grade |
|---|---|---|---|---|---|---|---|---|---|
| 304 | S30400 | A167 | SA182 | 304 | 5501 | MIL-S-5059 | QQ-S-766 | J405 | B8 |
| A182 | SA194 | 5513 | MIL-T-5695 | J405 | B8A | ||||
| A193 | SA213 | 5560 | MIL-T-6845 | 8 | |||||
| A194 | SA240 | 5563 | MIL-T-8504 | 8A | |||||
| A213 | SA249 | 5564 | MIL-T-8506 | F304 | |||||
| A240 | SA312 | 5565 | MIL-S-23195 | TP304 | |||||
| A249 | SA320 | 5566 | MIL-S-23196 | ||||||
| A269 | SA358 | 5567 | MIL-S-27419 | ||||||
| A270 | SA376 | 5639 | |||||||
| A271 | SA403 | 5697 | |||||||
| A276 | SA409 | 7228 | |||||||
| A312 | SA430 | 7245 | |||||||
| A313 | SA479 | ||||||||
| A314 | SA688 | ||||||||
| A320 | |||||||||
| A336 | |||||||||
| A358 | |||||||||
| A368 | |||||||||
| A376 | |||||||||
| A409 | |||||||||
| A430 | |||||||||
| A473 | |||||||||
| A478 | |||||||||
| A479 | |||||||||
| A492 | |||||||||
| A493 | |||||||||
| A511 | |||||||||
| A554 | |||||||||
| A580 | |||||||||
| A632 | |||||||||
| A666 | |||||||||
| A688 | |||||||||
| A793 | |||||||||
| A813 | |||||||||
| A814 | |||||||||
| A851 |
| Alloy | UNS | ASTM | ASME | AISI | AMS | Mil-Spec | FED | SAE | Grade |
|---|---|---|---|---|---|---|---|---|---|
| 304L | S30403 | A167 | SA182 | 304L | 5511 | MIL-S-403 | QQ-S-763 | J405 | TP 304L |
| A182 | SA213 | 5647 | MIL-S-23195 | QQ-S-766 | F 304L | ||||
| A213 | SA240 | MIL-S-23196 | |||||||
| A240 | SA249 | ||||||||
| A249 | SA312 | ||||||||
| A269 | SA403 | ||||||||
| A270 | SA479 | ||||||||
| A276 | SA688 | ||||||||
| A312 | |||||||||
| A314 | |||||||||
| A336 | |||||||||
| A403 | |||||||||
| A473 | |||||||||
| A478 | |||||||||
| A479 | |||||||||
| A511 | |||||||||
| A554 | |||||||||
| A580 | |||||||||
| A632 | |||||||||
| A666 | |||||||||
| A688 | |||||||||
| A774 | |||||||||
| A778 | |||||||||
| A813 | |||||||||
| A814 | |||||||||
| A851 |
| Alloy | UNS | ASTM | ASME | AISI | AMS | Mil-Spec | FED | SAE | Grade |
|---|---|---|---|---|---|---|---|---|---|
| 310 | S31000 | A167 | SA182 | 310 | QQ-S-763 | J405 | |||
| A182 | SA213 | QQ-S-766 | |||||||
| A213 | SA249 | ||||||||
| A249 | SA312 | ||||||||
| A276 | SA358 | ||||||||
| A314 | SA403 | ||||||||
| A336 | SA409 | ||||||||
| A358 | |||||||||
| A403 | |||||||||
| A409 | |||||||||
| A473 | |||||||||
| A580 | |||||||||
| A632 |
| Alloy | UNS | ASTM | ASME | AISI | AMS | Mil-Spec | FED | SAE | Grade |
|---|---|---|---|---|---|---|---|---|---|
| 316 | S31600 | A167 | SA182 | 316 | 5524 | MIL-S-5059 | QQ-S-763 | J405 | B8M |
| A182 | SA193 | 5573 | QQ-S-766 | B8MA | |||||
| A193 | SA194 | 5648 | B8M2 | ||||||
| A194 | SA213 | 5690 | B8M3 | ||||||
| A213 | SA240 | 5696 | 8M | ||||||
| A240 | SA249 | 7490 | 8MA | ||||||
| A249 | SA312 | TP316 | |||||||
| A269 | SA320 | ||||||||
| A270 | SA358 | ||||||||
| A271 | SA376 | ||||||||
| A276 | SA403 | ||||||||
| A312 | SA409 | ||||||||
| A313 | SA430 | ||||||||
| A314 | SA479 | ||||||||
| A320 | SA688 | ||||||||
| A336 | |||||||||
| A358 | |||||||||
| A368 | |||||||||
| A376 | |||||||||
| A403 | |||||||||
| A409 | |||||||||
| A430 | |||||||||
| A473 | |||||||||
| A478 | |||||||||
| A479 | |||||||||
| A492 | |||||||||
| A493 | |||||||||
| A511 | |||||||||
| A554 | |||||||||
| A580 | |||||||||
| A632 | |||||||||
| A666 | |||||||||
| A688 | |||||||||
| A771 | |||||||||
| A813 | |||||||||
| A814 | |||||||||
| A826 |
| Alloy | UNS | ASTM | ASME | AISI | AMS | Mil-Spec | FED | SAE | Grade |
|---|---|---|---|---|---|---|---|---|---|
| 316L | S31603 | A167 | SA182 | 316L | 5507 | QQ-S-763 | J405 | TP 316L | |
| A182 | SA213 | 5653 | QQ-S-766 | F 316L | |||||
| A213 | SA240 | ||||||||
| A240 | SA249 | ||||||||
| A249 | SA312 | ||||||||
| A269 | SA403 | ||||||||
| A270 | SA479 | ||||||||
| A276 | SA688 | ||||||||
| A312 | |||||||||
| A314 | |||||||||
| A336 | |||||||||
| A403 | |||||||||
| A473 | |||||||||
| A478 | |||||||||
| A479 | |||||||||
| A511 | |||||||||
| A554 | |||||||||
| A580 | |||||||||
| A632 | |||||||||
| A666 | |||||||||
| A688 | |||||||||
| A774 | |||||||||
| A778 | |||||||||
| A813 | |||||||||
| A814 |
| Alloy | UNS | ASTM | ASME | AISI | AMS | Mil-Spec | FED | SAE | Grade |
|---|---|---|---|---|---|---|---|---|---|
| 347 | S34700 | A167 | SA193 | 347 | 5512 | MIL-S-23195 | QQ-S-763 | ||
| A182 | SA194 | 5556 | MIL-S-23196 | QQ-S-766 | |||||
| A193 | SA213 | 5558 | |||||||
| A194 | SA240 | 5571 | |||||||
| A213 | SA249 | 5575 | |||||||
| A240 | SA312 | 5646 | |||||||
| A249 | SA320 | 5654 | |||||||
| A269 | SA358 | 5674 | |||||||
| A271 | SA376 | 7229 | |||||||
| A276 | SA403 | 7490 | |||||||
| A312 | SA409 | ||||||||
| A314 | SA430 | ||||||||
| A320 | SA479 | ||||||||
| A336 | |||||||||
| A358 | |||||||||
| A376 | |||||||||
| A403 | |||||||||
| A409 | |||||||||
| A430 | |||||||||
| A473 | |||||||||
| A479 | |||||||||
| A511 | |||||||||
| A554 | |||||||||
| A580 | |||||||||
| A632 | |||||||||
| A774 | |||||||||
| A778 | |||||||||
| A813 | |||||||||
| A814 |
Shelmet Precision Casting 300 Stainless Steel Alloys
300 stainless steel investment castings are austenitic chromium and nickel alloys poured for corrosion, heat and chemically resistant parts.
Shelmet Saves You Money & Gets You To Market Faster!
Experienced Shelmet metal casting experts save you development and casting use costs, because Shelmet evaluates and samples castings in your market. Carbon steels poured with differing alloys directly affect metal casting production, timing. and costs.