Special Alloy Round Bar Inventory

Date: 2026-09-29

Why Choose Our 17-4PH | 15-5PH | 440C | 440B | 440?

All round bars listed below are produced by theESR (Electro-Slag Remelting)process, offering significant advantages over conventional AOD material:

1. Higher Purity ESR significantly reduces impurities and inclusions, resulting in cleaner, more homogeneous material.

2. Superior Machinability Fine, uniformly dispersed inclusions ensure stable cutting forces during machining, reducing tool wear and breakage. Tool life is extended and downtime for tool changes is minimized.

3. Consistent Performance & Reliability 17-4PH is a precipitation-hardening steel whose post-aging strength and hardness are highly sensitive to composition segregation.

AOD material: in the same heat or even the same bar, elongation can vary by ~20% at high-hardness aging (e.g. H900), and yield ratio varies significantly at lower hardness (e.g. H1025).

ESR material: uniform composition keeps post-aging hardness variation within ±2 HRC. Longitudinal and transverse mechanical properties are closely matched, with significantly better fatigue strength and impact toughness — ideal for high-end equipment and dynamic / fatigue loading applications.

Current Stock – 17-4PH (UNS S17400) Round Bars

No.	Surface	Diameter (mm)	Length (mm)	Tolerance	Stock (kg)
1	Ground	3	2500	±0.05	5000
2	Ground	4	2500	±0.05	5000
3	Ground	5	2500	±0.05	5000
4	Ground	6.3	2500	0 to +0.1	5000
5	Ground	7	2500	0 to -0.05	5000
6	Ground	8.2	2500	0 to +0.1	5000
7	Ground	9.3	2500	0 to +0.1	5000
8	Ground	10.3	2500	0 to +0.1	5000
9	Ground	11.3	2500	0 to +0.1	5000
10	Peeled	12	5000-6000	0 to +0.5	5000
11	Peeled	14	5000-6000	0 to +0.5	5000
12	Peeled	16	5000-6000	0 to +0.5	5000
13	Peeled	18	5000-6000	0 to +0.5	5000
14	Peeled	19	5000-6000	0 to +0.5	5000
15	Peeled	20	5000-6000	0 to +0.5	5000
16	Peeled	22	5000-6000	0 to +0.5	5000
17	Peeled	23	5000-6000	0 to +0.5	5000
18	Peeled	25	5000-6000	0 to +0.5	5000
19	Peeled	28	5000-6000	0 to +0.5	5000
20	Peeled	30	5000-6000	0 to +0.5	5000
21	Peeled	32	5000-6000	0 to +0.5	5000
22	Peeled	35	5000-6000	0 to +0.5	5000
23	Peeled	38	5000-6000	0 to +0.5	5000
24	Peeled	40	5000-6000	0 to +1	5000
25	Peeled	42	5000-6000	0 to +1	5000
26	Peeled	45	5000-6000	0 to +1	5000
27	Peeled	48	5000-6000	0 to +1	5000
28	Peeled	50	5000-6000	0 to +1	5000
29	Peeled	55	5000-6000	0 to +1	5000
30	Peeled	60	5000-6000	0 to +1	5000
31	Peeled	65	5000-6000	0 to +1	5000
32	Peeled	70	5000-6000	0 to +1	5000
33	Peeled	75	5000-6000	0 to +1	5000
34	Peeled	80	5000-6000	0 to +4	5000
35	Peeled	85	5000-6000	0 to +4	5000
36	Peeled	90	5000-6000	0 to +4	5000
37	Peeled	95	5000-6000	0 to +4	5000
38	Peeled	100	4000-6000	0 to +4	5000
39	Peeled	105	4000-6000	0 to +4	5000
40	Peeled	110	4000-6000	0 to +4	5000
41	Peeled	115	4000-6000	0 to +4	5000
42	Peeled	120	4000-6000	0 to +4	5000
43	Peeled	130	4000-6000	0 to +4	5000
44	Peeled	140	4000-6000	0 to +4	5000
45	Peeled	150	4000-6000	0 to +4	5000
46	Peeled	160	4000-6000	0 to +4	5000
47	Peeled	170	4000-6000	0 to +4	5000
48	Peeled	180	4000-6000	0 to +4	5000
49	Peeled	190	4000-6000	0 to +4	5000
50	Peeled	200	4000-6000	0 to +4	5000
51	Peeled	210	4000-6000	0 to +4	5000
52	Peeled	220	4000-6000	0 to +4	5000
53	Peeled	230	4000-6000	0 to +4	5000
54	Peeled	240	4000-6000	0 to +4	5000
55	Peeled	250	4000-6000	0 to +4	5000
56	Peeled	260	4000-6000	0 to +4	5000
57	Peeled	270	4000-6000	0 to +4	5000
58	Peeled	280	4000-6000	0 to +4	5000
59	Peeled	290	4000-6000	0 to +4	5000
60	Peeled	300	approx. 3000	0 to +5	5000
61	Peeled	310	approx. 3000	0 to +5	5000
62	Peeled	320	approx. 3000	0 to +5	5000
63	Peeled	330	approx. 3000	0 to +5	5000
64	Peeled	340	approx. 3000	0 to +5	5000
65	Peeled	350	approx. 3000	0 to +5	5000
66	Peeled	360	approx. 3000	0 to +5	5000
67	Peeled	370	approx. 3000	0 to +5	5000
68	Peeled	380	approx. 3000	0 to +5	5000
69	Peeled	400	approx. 2000	0 to +5	5000
70	Peeled	420	approx. 2000	0 to +5	5000
71	Peeled	450	approx. 2000	0 to +5	5000
72	Peeled	470	approx. 2000	0 to +5	5000
73	Peeled	500	approx. 2000	0 to +5	5000

Current Stock – 15-5PH (UNS S15500) Round Bars

No.	Surface	Diameter (mm)	Length (mm)	Tolerance	Stock (kg)
1	Peeled	11	2500	0 to +0.5	5000
2	Peeled	12	5000-6000	0 to +0.5	5000
3	Peeled	13	5000-6000	0 to +0.5	5000
4	Peeled	14	5000-6000	0 to +0.5	5000
5	Peeled	16	5000-6000	0 to +0.5	5000
6	Peeled	18	5000-6000	0 to +0.5	5000
7	Peeled	19	5000-6000	0 to +0.5	5000
8	Peeled	20	5000-6000	0 to +0.5	5000
9	Peeled	22	5000-6000	0 to +0.5	5000
10	Peeled	23	5000-6000	0 to +0.5	5000
11	Peeled	24	5000-6000	0 to +0.5	5000
12	Peeled	25	5000-6000	0 to +0.5	5000
13	Peeled	26	5000-6000	0 to +0.5	5000
14	Peeled	28	5000-6000	0 to +0.5	5000
15	Peeled	30	5000-6000	0 to +0.5	5000
16	Peeled	32	5000-6000	0 to +0.5	5000
17	Peeled	35	5000-6000	0 to +0.5	5000
18	Peeled	38	5000-6000	0 to +0.5	5000
19	Peeled	40	5000-6000	0 to +1	5000
20	Peeled	42	5000-6000	0 to +1	5000
21	Peeled	45	5000-6000	0 to +1	5000
22	Peeled	48	5000-6000	0 to +1	5000
23	Peeled	50	5000-6000	0 to +1	5000
24	Peeled	55	5000-6000	0 to +1	5000
25	Peeled	60	5000-6000	0 to +1	5000
26	Peeled	65	5000-6000	0 to +1	5000
27	Peeled	70	5000-6000	0 to +1	5000
28	Peeled	75	5000-6000	0 to +1	5000
29	Peeled	80	5000-6000	0 to +1	5000
30	Peeled	85	5000-6000	0 to +1	5000
31	Peeled	90	5000-6000	0 to +1	5000
32	Peeled	95	5000-6000	0 to +1	5000
33	Peeled	100	4000-6000	0 to +4	5000
34	Peeled	105	4000-6000	0 to +4	5000
35	Peeled	110	4000-6000	0 to +4	5000
36	Peeled	115	4000-6000	0 to +4	5000
37	Peeled	120	4000-6000	0 to +4	5000
38	Peeled	130	4000-6000	0 to +4	5000
39	Peeled	140	4000-6000	0 to +4	5000
40	Peeled	150	4000-6000	0 to +4	5000
41	Peeled	160	4000-6000	0 to +4	5000
42	Peeled	170	4000-6000	0 to +4	5000
43	Peeled	180	4000-6000	0 to +4	5000
44	Peeled	190	4000-6000	0 to +4	5000
45	Peeled	200	4000-6000	0 to +4	5000
46	Peeled	210	4000-6000	0 to +4	5000
47	Peeled	220	4000-6000	0 to +4	5000
48	Peeled	230	4000-6000	0 to +4	5000
49	Peeled	240	4000-6000	0 to +4	5000
50	Peeled	250	4000-6000	0 to +4	5000
51	Peeled	260	4000-6000	0 to +4	5000
52	Peeled	270	approx. 3000	0 to +5	5000
53	Peeled	280	approx. 3000	0 to +5	5000
54	Peeled	290	approx. 3000	0 to +5	5000
55	Peeled	300	approx. 3000	0 to +5	5000
56	Peeled	310	approx. 3000	0 to +5	5000
57	Peeled	320	approx. 3000	0 to +5	5000
58	Peeled	330	approx. 3000	0 to +5	5000
59	Peeled	340	approx. 3000	0 to +5	5000
60	Peeled	350	approx. 3000	0 to +5	5000
61	Peeled	360	approx. 2000	0 to +5	5000
62	Peeled	370	approx. 2000	0 to +5	5000
63	Peeled	380	approx. 2000	0 to +5	5000
64	Peeled	400	approx. 2000	0 to +5	5000
65	Peeled	420	approx. 2000	0 to +5	5000
66	Peeled	450	approx. 2000	0 to +5	5000
67	Peeled	470	approx. 2000	0 to +5	5000
68	Peeled	500	approx. 2000	0 to +5	5000

440 Series – Stock Summary

440C, 440B and 440 are available across the full diameter ranges below. Please contact us for detailed diameter-by-diameter availability.

Material	UNS No.	Surface	Diameter Range (mm)	Length (mm)	Tolerance
440C	S44004	Ground	6.3 – 35.3	2500–6000	0 to +0.1
440C	S44004	Peeled	38 – 350	4000–6000	0 to +4 / +5
440B	S44003	Ground	10.2 – 11.3	2500	0 to +0.1
440B	S44003	Peeled	12 – 350	4000–6000	0 to +0.5 / +5
440B	S44003	Ground (Large)	373 – 503	2000–3000	0 to +3
440	S44000	Ground	6.5 – 11.5	2500	0 to +0.1
440	S44000	Peeled	12 – 350	4000–6000	0 to +0.5 / +5

We also stock other special alloy round bars (ESR). Please contact us for availability and specifications.

How to Read the Table

· Ground – Centerless ground, bright finish (small diameters).

· Peeled – Peeled / turned, black finish (larger diameters).

· ESR – Electro-Slag Remelting; all bars listed above are ESR quality.

· Stock (kg) – Quantity held per diameter / specification, ready for immediate dispatch.

Last updated: 2026-09-29. Stock moves fast – please confirm availability before ordering.

Need a Quote or Custom Size?

Send us your material, diameter & quantity – we'll reply within 24 hours.

Email: [sourcing@evernickel.com]

Phone / WhatsApp: +8617773160488

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Tags : 17-4PH Round Bar , 15-5PH Bar , Round Bar Stockist

Special Alloy Round Bar Inventory

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