You are looking at a quote for stainless steel bars. The price is listed per kg or per ton. You need to know if you are paying a fair price.

Stainless steel bar prices vary by grade, size, quantity, and market conditions. As of 2026, 304 stainless steel bar¹ typically costs $3.00-4.00 per kg ($3,000-4,000 per ton). 316 stainless steel bar² costs $4.00-6.00 per kg ($4,000-6,000 per ton). Larger quantities and standard sizes cost less. Small quantities and custom sizes cost more.

I have supplied stainless steel bars for projects across many industries. A machine shop ordered 304 round bar in large quantities. A railing fabricator ordered smaller quantities of 316 flat bar. Let me walk you through the pricing.

---

How much does stainless steel cost per ton?

304 stainless steel bar¹ costs $3,000 to $4,000 per ton. 316 stainless steel bar² costs $4,000 to $6,000 per ton. 430 stainless steel bar³ costs $1,800 to $2,500 per ton.

The price per ton depends on grade, form (round, square, flat), diameter or size, finish, and quantity. Larger orders (over 10 tons) get the lowest prices. Smaller orders (under 500 kg) cost significantly more per ton due to processing and handling fees.

Price per Ton by Grade and Form

Let me provide typical price ranges for stainless steel bars.

304 Stainless Steel Bar

Form	Price per ton (USD)	Notes
Round bar, 10-50mm	$3,000-3,500	Most common sizes
Round bar, under 10mm	$3,200-3,800	Small diameter premium
Round bar, over 50mm	$3,100-3,600	Larger diameter
Square bar	$3,100-3,600	Similar to round
Flat bar	$3,000-3,500	Less processing
Hex bar	$3,300-3,800	More processing

316 Stainless Steel Bar

Form	Price per ton (USD)	Notes
Round bar, 10-50mm	$4,200-4,800	Most common sizes
Round bar, under 10mm	$4,500-5,200	Small diameter premium
Round bar, over 50mm	$4,300-5,000	Larger diameter
Square bar	$4,200-4,900	Similar to round
Flat bar	$4,000-4,700	Less processing
Hex bar	$4,500-5,500	More processing

430 Stainless Steel Bar (Ferritic)

Form	Price per ton (USD)
Round bar	$1,800-2,200
Flat bar	$1,700-2,100

Quantity Discounts⁴ (304 round bar, 20mm)

Quantity	Price per ton (USD)
Under 100 kg	$4,500-5,000
100-500 kg	$3,800-4,200
500 kg - 2 tons	$3,400-3,800
2-10 tons	$3,200-3,500
Over 10 tons	$3,000-3,300

My Experience
For a large order of 15 tons of 304 round bar (20mm), we paid $3,100 per ton. For a small order of 100 kg of the same bar, we paid $4,800 per ton. Quantity makes a huge difference.

---

How much does 1 kg of stainless steel cost?

304 stainless steel bar¹ costs $3.00 to $4.00 per kg. 316 stainless steel bar² costs $4.00 to $6.00 per kg. 430 stainless steel bar costs $1.80 to $2.50 per kg.

The price per kg is simply the per-ton price divided by 1,000. But small quantities cost more per kg because of cutting, handling, and shipping fees. For a single bar (e.g., 20mm × 6m, about 15 kg), you might pay $5-7 per kg for 304 and $7-10 per kg for 316.

Price per kg by Quantity

Let me show you how quantity affects the price per kg.

304 Round Bar, 20mm Diameter

Quantity	Price per kg (USD)
Single bar (15 kg)	$5.00-6.00
100 kg	$4.00-4.50
500 kg	$3.50-3.80
1 ton	$3.20-3.50
10 tons	$3.00-3.20

316 Round Bar, 20mm Diameter

Quantity	Price per kg (USD)
Single bar (15 kg)	$7.00-9.00
100 kg	$5.50-6.50
500 kg	$4.80-5.50
1 ton	$4.20-4.80
10 tons	$4.00-4.50

Why Small Quantities Cost More

• Cutting fee (typically $5-10 per cut)
• Handling and packaging
• Shipping for small orders (higher per kg)
• Supplier minimum fees
• Less bargaining power

My Experience
For a small repair job, I bought a single 1-meter length of 304 round bar. I paid $6.50 per kg. For a production order of 10 tons, I paid $3.10 per kg. Buying in bulk saves money.

---

How many steel bars are in 1 ton?

The number of bars in 1 ton depends on the bar diameter, length, and material density. For 304 stainless steel¹ (density 8.0 g/cm³), a 20mm diameter × 6m bar weighs about 15 kg. One ton would contain about 66 bars.

For round bars, use the formula: weight per meter² = (diameter in mm)² × 0.00623 kg/m for 304/316. For square bars, weight per meter² = (side in mm)² × 0.008 kg/m. For flat bars, weight per meter² = width (mm) × thickness (mm) × 0.008 kg/m.

Number of Bars per Ton (304/316)

Let me provide a table for common bar sizes (6m length).

Round Bar (6m length, 304/316)

Diameter (mm)	Weight per Bar (kg)	Bars per Ton
6	1.34	746
8	2.39	418
10	3.74	267
12	5.38	186
16	9.57	104
20	14.9	67
25	23.4	43
32	38.3	26
40	59.8	17
50	93.5	11

Square Bar (6m length, 304/316)

Side (mm)	Weight per Bar (kg)	Bars per Ton
10	4.80	208
12	6.91	145
16	12.3	81
20	19.2	52
25	30.0	33
32	49.2	20
40	76.8	13

Flat Bar (6m length, 304/316)

Size (mm)	Weight per Bar (kg)	Bars per Ton
20×5	4.80	208
30×5	7.20	139
40×5	9.60	104
50×5	12.0	83
40×10	19.2	52
50×10	24.0	42
60×10	28.8	35

Weight Formula for 304/316

• Round bar: kg/m = (diameter mm)² × 0.00623
• Square bar: kg/m = (side mm)² × 0.008
• Flat bar: kg/m = width mm × thickness mm × 0.008

My Experience
When quoting a large order of 20mm round bar, I calculated that 1 ton would be about 67 bars. The customer ordered 2 tons (134 bars) and the shipment was exactly on weight.

---

How much does stainless steel cost per kg¹?

Stainless steel cost per kg ranges from $1.80 to $6.00 depending on grade and form. 430 costs $1.80-2.50 per kg. 304 costs $3.00-4.00 per kg. 316 costs $4.00-6.00 per kg.

The price per kg also depends on quantity, size, and finish. Small quantities cost more per kg. Small diameters (under 10mm) cost more per kg. Special finishes (ground, polished) cost more. Large quantities of standard sizes in 304 are the most economical.

Complete Price per kg Reference

Let me provide a comprehensive price reference.

304 Stainless Steel²

Form	Price per kg (USD)
Round bar, large quantity (10+ tons)	$3.00-3.30
Round bar, medium quantity (500 kg)	$3.40-3.80
Round bar, small quantity (100 kg)	$4.00-4.50
Round bar, single bar	$5.00-6.00
Flat bar	$3.00-3.50 (large quantity)
Hex bar	$3.30-3.80 (large quantity)

316 Stainless Steel

Form	Price per kg (USD)
Round bar, large quantity (10+ tons)	$4.00-4.50
Round bar, medium quantity (500 kg)	$4.80-5.50
Round bar, small quantity (100 kg)	$5.50-6.50
Round bar, single bar	$7.00-9.00
Flat bar	$4.00-4.70 (large quantity)
Hex bar	$4.50-5.50 (large quantity)

430 Stainless Steel

Form	Price per kg (USD)
Round bar, large quantity	$1.80-2.00
Round bar, small quantity	$2.20-2.50

Price Comparison by Grade

Grade	Relative Cost
430	0.6× 304
304	1.0× (base)
304L	1.05× 304
316	1.4-1.5× 304
316L	1.5-1.6× 304

My Experience
For a customer making a large quantity of parts, we quoted 304 round bar at $3.20 per kg. For a hobbyist buying a single bar, we quoted $5.50 per kg. The difference is all in the quantity.

---

Conclusion

304 stainless steel bar¹ costs $3,000-4,000 per ton ($3.00-4.00 per kg). 316 costs $4,000-6,000 per ton ($4.00-6.00 per kg). Quantity is the biggest factor in price per kg. A 20mm round bar weighs 15 kg per 6m length.

---